Hyundai Santa Fe (TM): Engine Control System - Engine Control/Fuel SystemHyundai Santa Fe (TM): Engine Control System

Description and operation

Description
If the Gasoline Engine Control system components (sensors, ECM, injector, etc.) fail, interruption to the fuel supply or failure to supply the proper amount of fuel for various engine operating conditions will result. The following situations may be encountered.
1.
Engine is hard to start or does not start at all.
2.
Unstable idle.
3.
Poor driveability
If any of the above conditions are noted, first perform a routine diagnosis that includes basic engine checks (ignition system malfunction, incorrect engine adjustment, etc.). Then, inspect the Gasoline Engine Control system components with the diagnostic tool.
  
Before removing or installing any part, read the diagnostic trouble codes and then disconnect the battery negative (-) terminal.
Before disconnecting the cable from battery terminal, turn the ignition switch to OFF. Removal or connection of the battery cable during engine operation or while the ignition switch is ON could cause damage to the ECM.
The control harnesses between the ECM and heated oxygen sensor are shielded with the shielded ground wires to the body in order to prevent the influence of ignition noises and radio interference. When the shielded wire is faulty, the control harness must be replaced.
When checking the generator for the charging state, do not disconnect the battery '+' terminal to prevent the ECM from damage due to the voltage.
When charging the battery with the external charger, disconnect the vehicle side battery terminals to prevent damage to the ECM.
Malfunction Indicator Lamp (MIL)
[EOBD]
A malfunction indicator lamp illuminates to notify the driver that there is a problem with the vehicle. However, the MIL will go off automatically after 3 subsequent sequential driving cycles without the same malfunction. Immediately after the ignition switch is turned on (ON position - do not start), the MIL will illuminate continuously to indicate that the MIL operates normally.
Faults with the following items will illuminate the MIL.
Catalyst
Fuel system
Mass Air Flow Sensor (MAFS)
Intake Air Temperature Sensor (IATS)
Engine Coolant Temperature Sensor (ECTS)
Throttle Position Sensor (TPS)
Upstream Oxygen Sensor
Upstream Oxygen Sensor Heater
Downstream Oxygen Sensor
Downstream Oxygen Sensor Heater
Injector
Misfire
Crankshaft Position Sensor (CKPS)
Camshaft Position Sensor (CMPS)
Evaporative Emission Control System
Vehicle Speed Sensor (VSS)
Idle Speed Control Actuator (ISCA)
Power Supply
ECM/ PCM
MT/AT Encoding
Acceleration Sensor
MIL-on Request Signal
Power Stage
  
Refer to "Inspection Chart For Diagnostic Trouble Codes (DTC)" for more information.
[NON-EOBD]
A malfunction indicator lamp illuminates to notify the driver that there is a problem with the vehicle. However, the MIL will go off automatically after 3 subsequent sequential driving cycles without the same malfunction. Immediately after the ignition switch is turned on (ON position - do not start), the MIL will illuminate continuously to indicate that the MIL operates normally.
Faults with the following items will illuminate the MIL
Heated oxygen sensor (HO2S)
Mass Air Flow sensor (MAFS)
Throttle position sensor (TPS)
Engine coolant temperature sensor (ECTS)
Idle speed control actuator (ISCA)
Injectors
ECM
  
Refer to "Inspection Chart For Diagnostic Trouble Codes (DTC)" for more information.
[INSPECTION]
1.
After turning ON the ignition key, ensure that the light illuminates for about 5 seconds and then goes out.
2.
If the light does not illuminate, check for an open circuit in the harness, a blown fuse or a blown bulb.
Self-Diagnosis
The ECM monitors the input/output signals (some signals at all times and the others under specified conditions). When the ECM detects an irregularity, it records the diagnostic trouble code, and outputs the signal to the Data Link connector. The diagnosis results can be read with the MIL or the diagnostic tool. Diagnostic Trouble Codes (DTC) will remain in the ECM as long as battery power is maintained. The diagnostic trouble codes will, however, be erased when the battery terminal or ECM connector is disconnected, or by the diagnostic tool.
  
If a sensor connector is disconnected with the ignition switch turned on, the diagnostic trouble code (DTC) is recorded. In this case, disconnect the battery negative terminal (-) for 15 seconds or more, and the diagnosis memory will be erased.
The Relation Between DTC and Driving Pattern in EOBD System

1.
When the same malfunction is detected and maintained during two sequential driving cycles, the MIL will automatically illuminate.
2.
The MIL will go off automatically if no fault is detected after 3 sequential driving cycles.
3.
A Diagnostic Trouble Code (DTC) is recorded in ECM memory when a malfunction is detected after two sequential driving cycles. The MIL will illuminate when the malfunction is detected on the second driving cycle.
If a misfire is detected, a DTC will be recorded, and the MIL will illuminate, immediately after a fault is first detected.
4.
A Diagnostic Trouble Code (DTC) will automatically erase from ECM memory if the same malfunction is not detected for 40 driving cycles.
  
A "warm-up cycle" means sufficient vehicle operation such that the coolant temperature has risen by at least 40 degrees Fahrenheit from engine starting and reaches a minimum temperature of 160 degress Fahrenheit.
A "driving cycle" consists of engine startup, vehicle operation beyond the beginning of closed loop operation.

Components and components location

Components Location

1. ECM (Engine Control Module)
2. Manifold Absolute Pressure Sensor (MAPS)
3. Intake Air Temperature Sensor (IATS)
4. Engine Coolant Temperature Sensor (ECTS)
5. Throttle Position Sensor (TPS)
6. Crankshaft Position Sensor (CKPS)
7. Camshaft Position Sensor (CMPS) [Bank 1 / Intake]
8. Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust]
9. Knock Sensor (KS)
10. Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1]
11. Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 2]
12. Accelerator Position Sensor (APS)
13. A/C Pressure Transducer (APT)
14. ETC Motor
15. Injector
16. Purge Control Solenoid Valve (PCSV)
17. Variable Force Solenoid (VFS) [Bank 1 / Intake]
18. Variable Force Solenoid (VFS) [Bank 1 / Exhaust]
19. Variable Intake Solenoid (VIS)
20. Ignition Coil
21. Main Relay
22. Fuel Pump Relay
23. Data Link Connector (DLC) [16-Pin]
24. Multi-Purpose Check Connector [16 Pin]

1. ECM (Engine Control Module)
2. Manifold Absolute Pressure Sensor (MAPS)
3. Intake Air Temperature Sensor (IATS)

4. Engine Coolant Temperature Sensor (ECTS)
5. Throttle Position Sensor (TPS) [integrated into ETC Module]
14. ETC Motor [integrated into ETC Module]

6. Crankshaft Position Sensor (CKPS)
7. Camshaft Position Sensor (CMPS) [Bank 1 / Intake]

8. Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust]
9. Knock Sensor (KS)

10. Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1]
11. Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor 2]

12. Accelerator Position Sensor (APS)
13. A/C Pressure Transducer (APT)

15. Injector
16. Purge Control Solenoid Valve (PCSV)

17. Variable Force Solenoid (VFS) [Bank 1 / Intake]
18. Variable Force Solenoid (VFS) [Bank 1 / Exhaust]

19. Variable Intake Solenoid (VIS)
20. Ignition Coil

21. Main Relay
22. Fuel Pump Relay
23. Data Link Connector (DLC) [16-Pin]

24. Multi-Purpose Check Connector [16 Pin]



Engine Control Module (ECM). Schematic diagrams

ECM Terminal and Input/Output signal

ECM Terminal Function
Connector A
Pin No
Description
Connected to
1
Power ground
Chassis Ground
2
-
-
3
-
-
4
-
-
5
-
-
6
Fuel Sender Signal
Fuel Sender
7
-
-
8
-
-
9
-
-
10
-
-
11
-
-
12
-
-
13
-
-
14
-
-
15
Stop Lamp Signal
Stop Lamp
16
Brake Test Switch
Brake Switch
17


18
-

19
-

20
Output Speed (Supply)
ATM Solenoid Valve (Otput Speed)
21
Input Speed (Supply)
ATM Solenoid Valve (Input Speed)
22
-
-
23
-
-
24
-
-
25
-
-
26
-
-
27
[A/T] SOL. (PWR1)
ATM Solenoid Valve
28
-
-
29
-
-
30
-
-
31
-
-
-
-
32
-
-
33
-
-
34
-
-
35
-
-
36
-
-
37
-
-
38
APT (Signal)
A/C Pressure Transducer (APT)
39
-
-
40
-
-
41
-
-
42
-
-
43
[A/T] Output Speed (Signal)
Engine Control Relay
44
[A/T] Input Speed (Signal)
ATM Solenoid Valve
45
-
-
46
-
-
47
-
-
48
[A/T] SOL. (VFS_26B)
ATM Solenoid Valve
49
[A/T] SOL. (VFS_OD)
ATM Solenoid Valve
50
[A/T] SOL. (VFS_PWR2)
ATM Solenoid Valve
51
-
-
52
-
-
53
-
-
54
-
-
55
-
-
56
APS (APS. 2 Ground)
Accelerator Position Sensor (APS)
57
APS (APS. 1 Ground)
Accelerator Position Sensor (APS)
58
-
-
59
-
-
60
-
-
61
APT (Ground)
A/C Pressure Transducer (APT)
62
-
-
63
-
-
64
-
-
65
-
-
66
-
-
67
-
-
68
-
-
69
[A/T] SOL. (OTS (-))
ATM Solenoid Valve
70
[A/T] SOL. (OTS (+))
ATM Solenoid Valve
71
-
-
72
[A/T] SOL. (VFS_LINE)
ATM Solenoid Valve
73
[A/T] SOL. (VFS_UD)
ATM Solenoid Valve
74
Start Relay Control
B/Alarm Relay
75
-
-
76
Vehicle Speed Signal
IBU & ESP Control Module
77
-
-
78
-
-
79
APS (APS. 2 Ground)
Accelerator Position Sensor (APS)
80
APS (APS. 1 Ground)
Accelerator Position Sensor (APS)
81
-
-
82
O2 Sensor (Up) (V_N)
Oxygen Sensor (Up)
83
O2 Sensor (Down) (Ground)
Oxygen Sensor (Down)
84
O2 Sensor (Up) (V_RC)
Oxygen Sensor (Up)
85
-
-
86
-
-
87
-
-
88
-
-
89
-
-
90
-
-
91
-
-
92
-
-
93
-
-
94
[A/T] SOL. Power (SS-B)
ATM Solenoid Valve
95
[A/T] SOL. (VFS_35R)
ATM Solenoid Valve
96
Memory Power
PCB Block
97
Wiper 'P' Input
PCB Block
98
-
-
99
-
-
100
-
-
101
-
-
102
APS (APS. 2 Supply)
Accelerator Position Sensor (APS)
103
APS (APS. 1 Supply)
Accelerator Position Sensor (APS)
104
APT (Supply)
A/C Pressure Transducer (APT)
105
O2 Sensor (Up) (V_G)
Oxygen Sensor (Up)
106
O2 Sensor (Down) (Signal)
Oxygen Sensor (Down)
107
O2 Sensor (Up) (V_IP)
Oxygen Sensor (Up)
108
-
-
109
Knock Sensor (Ground)
Knock Sensor (KS)
110
Knock Sensor (Signal)
Knock Sensor (KS)
111
-
-
112
-
-
113
-
-
114
-
-
115
-
-
116
-
-
117
[A/T] SOL. (SS-A)
ATM Solenoid Valve
118
[A/T] SOL. (VFS_T/CON)
ATM Solenoid Valve
119
Memory Power
PCB Block

Connector B
Pin No
Description
Connected to
1
Engine Control Relay 'ON' Input
Engine Control Relay
2
Engine Control Relay 'ON' Input
Engine Control Relay
3
Ground
Ground
4
Ground
Ground
5
Engine Control Relay 'ON' Input
PCB Block
6
P-CAN (High)
P-CAN (High)
7
P-CAN (Low)
P-CAN (Low)
8
-
-
9
-
-
10
-
-
11
-
-
12
-
-
13
OPTS (Signal)
Oil Pressure Switch
14
CMP (IN) (Signal)
Camshaft Position Sensor (Intake)
15
CMP (EX) (Signal)
Camshaft Position Sensor (Exhaust)
16
ETC Motor & Throttle Position Sensor.1 Signal
ETC Motor & Throttle Position Sensor
17
ETC Motor & Throttle Position Sensor Supply
ETC Motor & Throttle Position Sensor
18
-
-
19
-
-
20
-
-
21
-
-
22
-
-
23
-
-
24
Ignition Coil #1 (Control)
Ignition Coil #1
25
O2 Sensor (Up) (Heater)
Oxygen Sensor (Up)
26
O2 Sensor (Down) (Heater)
Oxygen Sensor (Down)
27
-
-
28
-
-
29
Local-CAN (High)
Electronic ATM Shift Lever, SCU (High)
30
Local-CAN (Low)
Electronic ATM Shift Lever, SCU (Low)
31
-
-
32
-
-
33
-
-
34
WTS #1 (Signal)
Engine Coolant Temperature Sensor
35
Sensor Power : Map, CMP (In), CKP
Sensor Power : Map, CMP (In), CKP
36
-
-
37
CMP (In) (Ground)
Camshaft Position Sensor (Intake)
38
CMP (EX) (Ground)
Camshaft Position Sensor (Exhaust)
39
ETC Motor & Throttle Position Sensor.2 Signal
ETC Motor & Throttle Position Sensor
40
-
-
41
-
-
42
Fuel Pump Relay Control
Fuel Pump Relay
43
Engine Control Relay Control
Engine Control Relay
44
-
-
45
-
-
46
A/C Relay Control
A/C Relay
47
Ignition Coil #3 (Control)
Ignition Coil #3
48
ETC DC Motor (+)
ETC Motor
49
ETC DC Motor (-)
ETC Motor
50
-
-
51
ON/Start (Input)
ON/Start (Input)
52
-
-
53
-
-
54
-
-
55
-
-
56
-
-
57
WTS #1 (Ground)
Engine Coolant Temperature Sensor
58
MAP & IAT Ground
MAP Sensor
59
-
-
60
-
-
61
-
-
62
ETC (TPS Groud)
ETC Motor & Throttle Position Sensor
63
-
-
64
-
-
65
Start Relay (Low Side)
Start Relay
66
-
-
67
-
-
68
-
-
69
-
-
70
OCV Control (EX)
CVVT Oil Control Valve (OCV)
71
OCV Control (IN)
CVVT Oil Control Valve (OCV)
72
-
-
73
-
-
74
-
-
75
Local-CAN2 (High)
Can Check
76
Local-CAN2 (Low)
Can Check
77
Alternator (IN)
Alternator
78
-
-
79
-
-
80
CKP (Ground)
Crankshaft Position Sensor (CKPS)
81
MAP Sensor (Signal)
MAP Sensor
82
Ignition Coil #1/#4 (Feedback)
Ignition Coil #1 / #4 (Feedback)
83
-
-
84
-
-
85
-
-
86
-
-
87
-
-
88
C/FAN Motor (PWM Signal)
C/FAN Motor
89
PCSV Control
Purge Control Solanoid Valve
90
CCV Control (Not Used)
Canister Close Valve
91
-
-
92
VIS Control
Variable Intake Solenoid Valve (VIS)
93
Ignition Coil #4 Control
Ignition Coil #4
94
Injector Coil #4 Control
Injector Coil #4
95
-
-
96
-
-
97
-
-
98
-
-
99
IMMO. Data Line
Immobilizer
100
-
-
101
-
-
102
-
-
103
Crankshaft Position Sensor (CKPS) signal input
Crankshaft Position Sensor (CKPS)
104
IAT Sensor
MAP Sensor
105
Ignition Coil #2 / #3 (Feedback)
Ignition Coil #2 / #3 (Feedback)
106
-
-
107
-
-
108
CMP (EX) (Supply)
Camshaft Position Sensor (CMPS)
109
FTPS (Not Used)
Fuel Tank Pressure Sensor (FTPS)
110
Engine RPM Signal
Engine RPM Signal
111
-
-
112
-
-
113
-
-
114
-
-
115
Thermostat PWM
Electronic Thermostat
116
Ignition Coil #2 Control
Ignition Coil #2
117
Injector Coil #1 Control
Injector Coil #1
118
Injector Coil #3 Control
Injector Coil #3
119
Injector Coil #2 Control
Injector Coil #2

Engine Control Module (ECM). Repair procedures

Removal
  
If you replace the PCM, you must perform oil pressure characteristics back up & input (TCU Replacement).
(Refer to Automatic Transaxle System - "Automatic Transaxle Control System")
  
When replacing the ECM, the vehicle equipped with the immobilizer must be performed procedure as below.
[In the case of installing used ECM]
1)
Perform "ECM Neutral mode" procedure with diagnostic tool.
(Refer to Body Electric System - "Immobilizer System")
2)
After finishing "ECM Neutral mode", perform "Key teaching" procedure with diagnostic tool.
(Refer to Body Electric System - "Immobilizer System")
[In the case of installing new ECM]
Perform "Key teaching" procedure with diagnostic tool.
(Refer to Body Electric System - "Immobilizer System")
  
When replacing the ECM, the vehicle equipped with the smart key system (Button start) must be performed procedure as below.
[In the case of installing used ECM]
1)
Perform "ECM Neutral mode" procedure with diagnostic tool.
(Refer to Body Electric System - "Smart Key")
2)
After finishing "ECM Neutral mode", insert the key (or press the start button) and turn it to the IGN ON and OFF position. Then the ECM learns the smart key information automatically.
[In the case of installing new ECM]
Insert the key (or press the start button) and turn it to the IGN ON and OFF position. Then the ECM learns the smart key information automatically.
1.
Turn the ignition switch OFF and disconnect the battery negative (-) terminal.
2.
Remove the air cleaner assembly.
(Refer to Engine Mechanical System - "Air Cleaner")
3.
Disconnect the ECM connector (A).

4.
Remove the mounting bolt (A) and nuts (B), and then remove the ECM (C).

Installation
  
When replacing the ECM, the vehicle equipped with the immobilizer must be performed procedure as below.
[In the case of installing used ECM]
1)
Perform "ECM Neutral mode" procedure with diagnostic tool.
(Refer to Body Electric System - "Immobilizer System")
2)
After finishing "ECM Neutral mode", perform "Key teaching" procedure with diagnostic tool.
(Refer to Body Electric System - "Immobilizer System")
[In the case of installing new ECM]
Perform "Key teaching" procedure with diagnostic tool.
(Refer to Body Electric System - "Immobilizer System")
  
When replacing the ECM, the vehicle equipped with the smart key system (Button start) must be performed procedure as below.
[In the case of installing used ECM]
1)
Perform "ECM Neutral mode" procedure with diagnostic tool.
(Refer to Body Electric System - "Smart Key")
2)
After finishing "ECM Neutral mode", insert the key (or press the start button) and turn it to the IGN ON and OFF position. Then the ECM learns the smart key information automatically.
[In the case of installing new ECM]
Insert the key (or press the start button) and turn it to the IGN ON and OFF position. Then the ECM learns the smart key information automatically.
1.
Install in the reverse order of removal.
ECM Problem Inspection Procedure
1.
TEST ECM GROUND CIRCUIT : Measure resistance between ECM and chassis ground using the backside of ECM harness connector as ECM side check point. If the problem is found, repair it.
Specification : Below 1Ω
2.
TEST ECM CONNECTOR : Disconnect the ECM connector and visually check the ground terminals on ECM side and harness side for bent pins or poor contact pressure. If the problem is found, repair it.
3.
If problem is not found in Step 1 and 2, the ECM could be faulty. If so, make sure there were no DTC's before swapping the ECM with a new one, and then check the vehicle again. If DTC's were found, examine this first before swapping ECM.
4.
RE-TEST THE ORIGINAL ECM : Install the original ECM (may be broken) into a known-good vehicle and check the vehicle. If the problem occurs again, replace the original ECM with a new one. If problem does not occur, this is intermittent problem.
(Refer to "Intermittent Problem Inspection Procedure" in Basic Inspection Procedure)
VIN Programming Procedure
VIN (Vehicle Identification Number) is a number that has the vehicle's information (Maker, Vehicle Type, Vehicle Line/Series, Body Type, Engine Type, Transmission Type, Model Year, Plant Location and so forth. For more information, please refer to the group "GI" in this SERVICE MANUAL). When replacing an ECM, the VIN must be programmed in the ECM. If there is no VIN in ECM memory, the fault code (DTC P0630) is set.
  
The programmed VIN cannot be changed. When writing the VIN, confirm the VIN carefully
1.
Turn OFF the ignition switch.
2.
Connect the diagnostic tool to Data Link Connector (DLC).
3.
Turn ON the ignition switch.
4.
Select "Vehicle, Model Year, Engine, System".
5.
Select "Vehicle S/W Management".
6.
Select "Write VIN".

7.
Input the VIN.
  
Before inputing the VIN, confirm the VIN again because the programmed VIN cannot be changed.

ETC (Electronic Throttle Control) System

Description and operation

Description
The Electronic Throttle Control (ETC) System consists of a throttle body with an integrated control motor and throttle position sensor (TPS). Instead of the traditional throttle cable, an Accelerator Position Sensor (APS) is used to receive driver input. The ECM uses the APS signal to calculate the target throttle angle; the position of the throttle is then adjusted via ECM control of the ETC motor. The TPS signal is used to provide feedback regarding throttle position to the ECM. Using ETC, precise control over throttle position is possible; the need for external cruise control modules/cables is eliminated.

Troubleshooting

Fail-Safe Mode
Item
Fail-Safe
ETC Motor
Throttle valve stuck at 5°
TPS
TPS 1 fault
Replace it with TPS2
TPS 2 fault
Replace it with TPS1
TPS 1, 2 fault
Throttle valve stuck at 5°
APS
TPS 1 fault
Replace it with TPS2
TPS 2 fault
Replace it with TPS1
TPS 1, 2 fault
Throttle valve stuck at 5°

  
When throttle value is stuck at 5°, engine speed is limited at below 1,500rpm and vehicle speed at maximum 40 - 50 km/h (25 - 31 mph).

Specifications

Specification
[Throttle Position Sensor (TPS)]
Throttle Angle (°)
Output Voltage (V)
TPS1
TPS2
0
0.0
5.0
10
0.48
4.52
20
0.95
4.05
30
1.43
3.57
40
1.90
3.10
50
2.38
2.62
60
2.86
2.14
70
3.33
1.67
80
3.81
1.19
90
4.29
0.71
100
4.76
0.24
105
5.0
0
C.T (6 - 15°)
0.29 - 0.71
4.29 - 4.71
W.O.T (93 - 102°)
4.43 - 4.86
0.14 - 0.57

Item
Sensor Resistance (kΩ)
TPS1
0.875 - 1.625 [20°C (68°F)]
TPS2
0.875 - 1.625 [20°C (68°F)]

[ETC Motor]
Item
Specification
Coil Resistance (Ω)
1.2 - 1.8 [20°C (68°F)]

Schematic diagrams

Schematic Diagram

Circuit Diagram

Harness Connector

Repair procedures

Inspection
Throttle Position Sensor (TPS)
1.
Connect the diagnostic tool on the Data Link Connector (DLC).
2.
Start the engine and measure the output voltage of TPS 1 and 2 at C.T. and W.O.T.
Throttle Angle
Output Voltage (V)
TPS 1
TPS 2
C.T
0.3 - 0.9
4.2 - 5.0
W.O.T
1.5 - 3.0
3.3 - 3.8

3.
Turn the ignition switch OFF and disconnect the scantool from the DLC.
4.
Disconnect the ETC module connector and measure the resistance between the ETC module terminals 1 and 2.
Specification : Refer to "Specification"
ETC Motor
1.
Turn the ignition switch OFF.
2.
Disconnect the ETC module connector.
3.
Measure resistance between the ETC module terminals 3 and 6.
4.
Check that the resistance is within the specification.
Specification : Refer to "Specification"
Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Remove the resonator and the air intake hose.
(Refer to Engine Mechanical System - "Intake Manifold")
3.
Disconnect the ETC module connector (A).

4.
Remove the installation bolts (A), and then remove the ETC module from the engine.
Tightening Torque :
7.8 - 11.8 N.m (0.8 - 1.2 kgf.m, 5.8 - 8.7 lb-ft)

Installation
  
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
1.
Installation is reverse of removal.

Manifold Absolute Pressure Sensor (MAPS). Description and operation

Description
Manifold Absolute Pressure Sensor (MAPS) is a speed-density type sensor and is installed on the surge tank. It senses absolute pressure of the surge tank and transfers the analog signal proportional to the pressure to the ECM. By using this signal, the ECM calculates the intake air quantity and engine speed.
The MAPS consists of a piezo-electric element and a hybrid IC amplifying the element output signal. The element is silicon diaphragm type and adapts pressure sensitive variable resistor effect of semi-conductor. Because 100% vacuum and the manifold pressure apply to both sides of the sensor respectively, this sensor can output analog signal by using the silicon variation proportional to pressure change.

Manifold Absolute Pressure Sensor (MAPS). Specifications

Specification
Pressure (kPa)
Output Voltage (V)
20.0
0.79
46.7
1.84
101.3
4.0

Manifold Absolute Pressure Sensor (MAPS). Schematic diagrams

Circuit Diagram

Harness Connector

Manifold Absolute Pressure Sensor (MAPS). Repair procedures

Inspection
1.
Connect the diagnostic tool on the Data Link Connector (DLC).
2.
Measure the output voltage of the MAPS at idle and IG ON.
Specification : Refer to "Specification"
Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the manifold absolute pressure sensor connector (A).
3.
Remove the installation bolt (B), and then remove the sensor from the surge tank.
Tightening Torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

Installation
  
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
  
Insert the sensor in the installation hole and be careful not to damage when installation.
1.
Installation is reverse of removal.

Intake Air Temperature Sensor (IATS). Description and operation

Description
Intake Air Temperature Sensor (IATS) is included inside Manifold Absolute Pressure Sensor and detects the intake air temperature.
To calculate precise air quantity, correction of the air temperature is needed because air density varies according to the temperature. So the ECM uses not only MAPS signal but also IATS signal. This sensor has a Negative Temperature Coefficient (NTC) Thermister and it's resistance changes in reverse proportion to the temperature.

Intake Air Temperature Sensor (IATS). Specifications

Specification
Temperature [°C (°F)]
Resistance (kΩ)
-40 (-40)
40.93 - 48.35
-20 (-4)
13.89 - 16.03
0 (32)
5.38 - 6.09
10 (50)
3.48 - 3.90
20 (68)
2.31 - 2.57
40 (104)
1.08 - 1.21
60 (140)
0.54 - 0.62
80 (176)
0.29 - 0.34

Intake Air Temperature Sensor (IATS). Schematic diagrams

Circuit Diagram

Harness Connector

Intake Air Temperature Sensor (IATS). Repair procedures

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the IATS connector.
3.
Measure resistance between the IATS terminals 3 and 4.
4.
Check that the resistance is within the specification.
Specification : Refer to "Specification"
Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the manifold absolute pressure sensor connector (A).
3.
Remove the installation bolt (B), and then remove the sensor from the surge tank.
Tightening Torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

Installation
  
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
  
Insert the sensor in the installation hole and be careful not to damage when installation.
1.
Installation is reverse of removal.

Engine Coolant Temperature Sensor (ECTS). Description and operation

Description
Engine Coolant Temperature Sensor (ECTS) is located in the engine coolant passage of the cylinder head for detecting the engine coolant temperature. The ECTS uses a thermistor whose resistance changes with the temperature.
The electrical resistance of the ECTS decreases as the temperature increases, and increases as the temperature decreases. The reference +5V is supplied to the ECTS via a resistor in the ECM. That is, the resistor in the ECM and the thermistor in the ECTS are connected in series. When the resistance value of the thermistor in the ECTS changes according to the engine coolant temperature, the output voltage also changes.
During cold engine operation, the ECM increases the fuel injection duration and controls the ignition timing using the information of engine coolant temperature to avoid engine stalling and improve drivability.

Engine Coolant Temperature Sensor (ECTS). Specifications

Specification
Temperature [°C (°F)]
Resistance (kΩ)
-40 (-40)
41.74 - 54.54
-30 (-22)
23.54 - 29.94
-20 (-4)
14.13 - 16.83
-10 (14)
8.39 - 10.22
0 (32)
5.28 - 6.29
10 (50)
3.42 - 4.00
20 (68)
2.31 - 2.59
30 (86)
1.55 - 1.76
40 (104)
1.08 - 1.21
50 (122)
0.77 - 0.85
60 (140)
0.56 - 0.61
70 (158)
0.41 - 0.44
80 (176)
0.31 - 0.33
90 (194)
0.23 - 0.25
100 (212)
0.18 - 0.19

Engine Coolant Temperature Sensor (ECTS). Schematic diagrams

Circuit Diagram

Harness Connector

Engine Coolant Temperature Sensor (ECTS). Repair procedures

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the ECTS connector.
3.
Remove the ECTS.
4.
After immersing the thermistor of the sensor into engine coolant, measure resistance between the ECTS terminals 3 and 4.
5.
Check that the resistance is within the specification.
Specification : Refer to "Specification"
Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Remove the engine control module.
(Refer to Engine Control/Fuel System - "Engine Control Module (ECM)")
3.
Disconnect the engine coolant temperature sensor connector (A).
4.
Remove the installation bolts (B), and then remove the engine coolant temperature sensor from the engine.
Tightening Torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

  
Note that engine coolant may be flowed out from the water temperature control assembly when removing the sensor.
5.
Supplement the engine coolant.
(Refer to Engine Mechanical System - "Coolant")
Installation
  
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
  
Apply the engine coolant to the O-ring.
  
Insert the sensor in the installation hole and be careful not to damage when installation.
1.
Installation is reverse of removal.

Crankshaft Position Sensor (CKPS). Description and operation

Description
Crankshaft Position Sensor (CKPS) detects the crankshaft position and is one of the most important sensors of the engine control system. If there is no CKPS signal input, the engine may stop because of CKPS signal missing. This sensor is installed on the cylinder block or the transaxle housing and generates alternating current by magnetic flux field which is made by the sensor and the target wheel when engine runs.
The target wheel consists of 58 slots and 2 missing slots on 360 degrees CA (Crank Angle).

Crankshaft Position Sensor (CKPS). Schematic diagrams

Circuit Diagram

Harness Connector

Crankshaft Position Sensor (CKPS). Repair procedures

Inspection
1.
Check the signal waveform of the CMPS and CKPS using the diagnostic tool.
Specification : Refer to "DTC Diagnostic Guide"
Removal
  
Be careful not to damage the parts located under the vehicle (floor under cover, fuel filter, fuel tank and canister) when raising the vehicle using the lift.
(Refer to General Information - "Lift and Support Points")
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the crankshaft position sensor connector (A).

3.
Lift the vehicle.
4.
Remove the engine room under cover.
(Refer to Engine Mechanical System - "Engine Room Under Cover")
5.
Remove the protector (A).

6.
Remove the installation bolt (A), and then remove the crankshaft position sensor.
Tightening Torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

Installation
  
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
  
Apply the engine oil to the O-ring.
  
Insert the sensor in the installation hole and be careful not to damage when installation.
1.
Installation is reverse of removal.
Crankshaft position sensor installation bolt : 9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)
Crankshaft position sensor protector installation bolt (M8) : 18.6 - 23.5 N.m
(1.9 - 2.4 kgf.m, 13.7 - 17.4 lb-ft)
Crankshaft position sensor protector installation bolt (M6) : 9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

Camshaft Position Sensor (CMPS). Description and operation

Description
Camshaft Position Sensor (CMPS) is a hall sensor and detects the camshaft position by using a hall element.
It is related with Crankshaft Position Sensor (CKPS) and detects the piston position of each cylinder which the CKPS can't detect.
The CMPS is installed on engine head cover and uses a target wheel installed on the camshaft. The Cam Position sensor is a hall-effect type sensor. As the target wheel passes the Hall sensor, the magnetic field changes in the sensor. The sensor then switches a signal which creates a square wave.

Camshaft Position Sensor (CMPS). Schematic diagrams

Circuit Diagram

Harness Connector

Camshaft Position Sensor (CMPS). Repair procedures

Inspection
1.
Check the signal waveform of the CMPS and CKPS using the diagnostic tool.
Specification : Refer to "DTC Diagnostic Guide"
Removal
  
DON’T remove the camshaft position sensor during engine running or right after engine stops, or a scald by the flowed out engine oil may occur.
[Bank 1 / Intake]
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the camshaft position sensor connector (A).
3.
Remove the installation bolt, and then remove the sensor (B).
Tightening Torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

[Bank 1 / Exhaust]
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the camshaft position sensor connector (A).
3.
Remove the hanger and the protector.
4.
Remove the installation bolt, and then remove the sensor.
Tightening Torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

Installation
  
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
  
Apply the engine oil to the O-ring.
  
Insert the sensor in the installation hole and be careful not to damage when installation.
  
Be careful not to damage the sensor housing and the connector.
Be careful not to damage the O-ring.
1.
Installation is reverse of removal.

Knock Sensor (KS). Description and operation

Description
Knocking is a phenomenon characterized by undesirable vibration and noise and can cause engine damage. Knock Sensor (KS) is installed on the cylinder block and senses engine knocking.
When knocking occurs, the vibration from the cylinder block is applied as pressure to the piezoelectric element. When a knock occurs, the sensor produces voltage signal. The ECM retards the ignition timing when knocking occurs. If the knocking disappears after retarding the ignition timing, the ECM will advance the ignition timing. This sequential control can improve engine power, torque and fuel economy.

Knock Sensor (KS). Specifications

Specification
Item
Specification
Capacitance (pF)
850 - 1,150

Knock Sensor (KS). Schematic diagrams

Circuit Diagram

Harness Connector

Knock Sensor (KS). Repair procedures

Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Remove the intake manifold.
(Refer to Engine Mechanical System - "Intake Manifold")
3.
Remove the installation bolt (A), and then remove the sensor from the cylinder block.
Tightening Torque :
18.6 - 23.5 N.m (1.9 - 2.4 kgf.m, 13.7 - 17.4 lb-ft)

Installation
  
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
1.
Installation is reverse of removal.

Heated Oxygen Sensor (HO2S). Description and operation

Description
Heated Oxygen Sensor (HO2S) consists of zirconium and alumina and is installed both upstream and downstream of the Manifold Catalytic Converter. It varies in accordance with the air/fuel ratio.
The sensor must be hot in order to operate normally. To keep it hot, the sensor has a heater which is controlled by the ECM via a duty cycle signal. When the exhaust gas temperature is lower than the specified value, the heater warms the sensor tip.

Heated Oxygen Sensor (HO2S). Specifications

Specification
HO2S [Bank 1 / Sensor 1] [Euro-V]
Item
Specification
Heater Resistance (Ω)
2.5 - 4.0 [20°C (68°F)]

HO2S [Bank 1 / Sensor 1] [Except Euro-V]
A/F Ratio (λ)
Output Voltage (V)
RICH
Approx. 0.9
LEAN
Approx. 0.04

Item
Specification
Heater Resistance (Ω)
3.3 - 4.1Ω [21°C (69.8°F)]

HO2S [Bank 1 / Sensor 2]
A/F Ratio (λ)
Output Voltage (V)
RICH
Approx. 0.9
LEAN
Approx. 0.04

Item
Specification
Heater Resistance (Ω)
3.3 - 4.1Ω [21°C (69.8°F)]

Heated Oxygen Sensor (HO2S). Schematic diagrams

Circuit Diagram

Harness Connector
[Bank 1 / Sensor 1]

[Bank 1 / Sensor 2]

Heated Oxygen Sensor (HO2S). Repair procedures

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the HO2S connector.
3.
Measure resistance between the HO2S terminals 4 and 5 [B1/S1] [Euro-V].
4.
Measure resistance between the HO2S terminals 3 and 4 [B1/S1] [Except Euro-V].
5.
Measure resistance between the HO2S terminals 3 and 4 [B1/S2].
6.
Check that the resistance is within the specification.
Specification : Refer to "Specification"
Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the connector (A), and then remove the sensor (B).
Tightening Torque :
39.2 - 49.1 N.m (4.0 - 5.0 kgf.m, 28.9 - 36.2 lb-ft)
  
Note that the SST (Part No. : 09392-2H100) is useful when removing the heated oxygen sensor.
[Bank 1 / Sensor 1]

[Bank 1 / Sensor 2]

Installation
  
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
  
DON’T use a cleaner, spray, or grease to sensing element and connector of the sensor because oil component in them may malfunction the sensor performance.
Sensor and its wiring may be damaged in case of contacting with the exhaust system (Exhaust Manifold, Catalytic Converter, and so on).
1.
Installation is reverse of removal.

Accelerator Position Sensor (APS). Description and operation

Description
On electronic injection systems, there is no longer a load lever that mechanically controls the fuelling. The flow is caculated by the ECM depending on a number of parameters, including pedal position, which is measured using a potentiometer. The pedal sensor has two potentio-meters whoses slides are mechanically solid. The two potentiometers are supplied from distinct and different power sources so there is built in redundancy of information giving reliable driver's request information. A voltage is generated across the potentiometer in the acceleration position sensor as a function of the accelerator-pedal setting. Using a peogrammed characteristic curve, the pedal's position is then calculated from this voltage.

Accelerator Position Sensor (APS). Specifications

Specification
Accelerator Position
Output Voltage (V) [Vref=5V]
APS 1
APS 2
C.T
0.7 - 0.8
0.33 - 0.43
W.O.T
3.98 - 4.35
1.93 - 2.17

Accelerator Position Sensor (APS). Schematic diagrams

Circuit Diagram

Harness Connector

Accelerator Position Sensor (APS). Repair procedures

Inspection
1.
Connect the diagnostic tool on the Data Link Connector (DLC).
2.
Turn the ignition switch ON.
3.
Measure the output voltage of the APS 1 and 2 at C.T and W.O.T.
Accelerator Position
Output Voltage (V) [Vref=5V]
APS 1
APS 2
C.T
0.7 - 0.8
0.33 - 0.43
W.O.T
3.98 - 4.35
1.93 - 2.18

Removal
1.
Turn the ignition switch OFF and disconnect the battery (-) terminal.
2.
Disconnect the accelerator position snesor connector (A).

3.
Disconnect the mounting cap (A).

4.
Remove the accelerator pedal module from the vehicle after loosening the mounting bolt (A).
Tightening Torque :
8.8 - 13.7 N.m (0.9 - 1.4 kgf.m, 6.5 - 10.1 lb.ft)

Installation
1.
Install in the reverse order of removal.

Injector. Description and operation

Description
Based on information from various sensors, the ECM can calculate the fuel amount to be injected. The fuel injector is a solenoid-operated valve and the fuel injection amount is controlled by length of injection time. The ECM controls each injector by grounding the control circuit. When the ECM energizes the injector by grounding the control circuit, the circuit voltage should be low (theoretically 0V) and the fuel is injected. When the ECM de-energizes the injector by opening control circuit, the fuel injector is closed and circuit voltage should momentarily peak.

Injector. Specifications

Specification
Item
Specification
Coil Resistance (Ω)
13.8 - 15.2 [20°C (68°F)]

Injector. Schematic diagrams

Circuit Diagram

Harness Connector

Injector. Repair procedures

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the injector connector.
3.
Measure resistance between the injector terminals 1 and 2.
4.
Check that the resistance is within the specification.
Specification : Refer to "Specification"
Removal
1.
Release the residual pressure in fuel line.
Release the residual pressure in fuel line.
2.
Turn the ignition switch OFF and disconnect the battery (-) terminal.
3.
Disconnect the fuel delivery line quick-connector (A).

  
Open the clamp cover (B) before disconnecting the quick-connector. (If the clip is applied)

  
When removing the quick-connnector with the clip removing tool (A), be careful not to damage the plastic clip (B).
If the clip is damaged, it can cause a fuel leak due to bad connection and could result in a fire.

4.
Disconnect the injector connector (A).

5.
Remove the delivery pipe & injector assembly after loosening the bolt (A).
Tightening Torque
18.6 - 23.5 N.m (1.9 - 2.4 kgf.m, 13.7 - 17.4 lb-ft)

6.
Remove the injector from the delivery pipe (A) after releasing the fixing clip both side as shown below.

Installation
  
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
  
Apply the engine oil to the injector O-ring.
  
Inspect the injector O-ring when installing.
1.
Installation is reverse of removal.

Purge Control Solenoid Valve (PCSV). Description and operation

Description
Purge Control Solenoid Valve (PCSV) is installed on the surge tank and controls the passage between the canister and the intake manifold. It is a solenoid valve and is open when the ECM grounds the valve control line. When the passage is open (PCSV ON), fuel vapor stored in the canister is transferred to the intake manifold.

Purge Control Solenoid Valve (PCSV). Specifications

Specification
Item
Specification
Coil Resistance (Ω)
19.0 - 22.0 [20°C (68°F)]

Purge Control Solenoid Valve (PCSV). Schematic diagrams

Circuit Diagram

Harness Connector

Purge Control Solenoid Valve (PCSV). Repair procedures

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the PCSV connector.
3.
Measure resistance between the PCSV terminals 1 and 2.
4.
Check that the resistance is within the specification.
Specification : Refer to "Specification"
Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the purge control solenoid valve connector (A).
3.
Disconnect the vapor hoses (B) from the purge control solenoid valve.
4.
Remove the bracket installation bolt (C), and then remove the valve from the surge tank.
Tightening Torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

Installation
  
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
  
Be careful of foreign material not to flow into the valve.
1.
Installation is reverse of removal.

Variable Force Solenoid (VFS). Description and operation

Description
CVVT (Continuous Variable Valve Timing) system advances or retards the valve opening and closing timing of the intake or the exhaust valve in accordance with the ECM control, calculated by the engine speed and the load. The CVVT control causes a valve over-lap or under-lap between the intake valve and the exhaust valve. This improves fuel efficiency, reduces exhaust gases (NOx, HC) and enhances the engine performance, thanks to reduced pumping loss, internal EGR (Exhaust Gas Recirculation) release, improved combustion stability, and increased volumetric efficiency.The system consists of the CVVT Oil Control Valve (OCV), which receives the ECM PWM (Pulse With Modulation) control signal to change the path of the engine oil to supply to or discharge from the cam phaser, the CVVT Oil Temperature Sensor (OTS), which measures the temperatures of the engine oil, and the cam phaser, which varies the cam phasing by using the hydraulic force of the engine oil.The oil delivered from the CVVT oil control valve varies the phase angle of the cam, by rotating the rotor connected to the camshaft of the cam phaser and causing the camshaft to rotate in the direction of its engine running rotation (intake advanced / exhaust retarded) or the opposite direction (intake retarded/ exhaust advanced).

Variable Force Solenoid (VFS). Specifications

Specification
Item
Specification
Coil Resistance (Ω)
6.0 - 7.0 [20°C (68°F)]

Variable Force Solenoid (VFS). Schematic diagrams

Circuit Diagram

Harness Connector

Variable Force Solenoid (VFS). Repair procedures

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the OCV connector.
3.
Measure resistance between the OCV terminals 1 and 2.
4.
Check that the resistance is within the specification.
Specification : Refer to "Specification"
Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the CVVT oil control valve connector (A).
3.
Remove the installation bolt (B), and then remove the valve from the engine.
Tightening Torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)
[Bank 1 / Intake]

[Bank 1 / Exhaust]

Installation
  
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
  
Apply the engine oil to the valve O-ring.
1.
Installation is reverse of removal.

Variable Intake Solenoid (VIS) Valve. Description and operation

Description
Variable Intake manifold Solenoid (VIS) valve is installed on the intake manifold. The VIS valve controls the vacuum modulator which activates a valve in the intake manifold. The ECM opens or closes this valve according to engine condition (Refer to below table).

Engine Condition
VIS Valve
Operation
Medium speed
Closed
Increasing engine performance in low engine speed by reducing intake interference among cylinders
Low / High speed
Open
Minimizing intake resistance by shortening intake manifold length and increasing area of air entrance

Variable Intake Solenoid (VIS) Valve. Specifications

Specification
Item
Specification
Coil resistance (Ω)
30.0 - 35.0 [20°C (68°F)]

Variable Intake Solenoid (VIS) Valve. Schematic diagrams

Circuit Diagram

Harness Connector

Variable Intake Solenoid (VIS) Valve. Repair procedures

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the VIS valve connector.
3.
Measure resistance between VIS valve terminals 1 and 2.
Specification : Refer to "Specification"
Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the variable intake solenoid valve connector (A).
3.
Disconnect the vacuum link (B) from the valve.

4.
Disconnect the vacuum hoses (A) from the valve.
5.
Remove the installation bolt (B), and then remove the valve from the surge tank.
Tightening Torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

Installation
  
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
  
Be careful of foreign material not to flow into the valve.
1.
Installation is reverse of removal.
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