Infiniti FX35, FX50 (S51). Manual - part 868

 

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Infiniti FX35, FX50 (S51). Manual - part 868

 

 

P1238, P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

EC-1013

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

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P1238, P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

Description

INFOID:0000000005237500

Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc.
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The throttle position sensor detects the throttle valve position, and sends the voltage signal to the ECM. The
ECM judges the current opening angle of the throttle valve from this signal and opens/closes the throttle valve
in response to driving conditions via the throttle control motor.

DTC Logic

INFOID:0000000005237501

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test. 
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A AND B

1.

Turn ignition switch ON and wait at least 1 second.

2.

Shift selector lever position to D and wait at least 3 seconds.

3.

Shift selector lever position to P.

4.

Turn ignition switch OFF and wait at least 10 seconds.

5.

Turn ignition switch ON and wait at least 1 second.

6.

Shift selector lever position to D and wait at least 3 seconds.

7.

Shift selector lever position to P.

8.

Turn ignition switch OFF, wait at least 10 seconds, and then turn ON.

9.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-1014, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION C

1.

Turn ignition switch ON and wait at least 1 second.

2.

Shift selector lever position to D and wait at least 3 seconds.

3.

Shift selector lever position to P.

4.

Start engine and let it idle for 3 seconds.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1238

Electric throttle control 
actuator (bank 2)

A)

Electric throttle control actuator does not function 
properly due to the return spring malfunction.

• Electric throttle control actuator

B)

Throttle valve opening angle in fail-safe mode is 
not in specified range.

C)

ECM detect that the throttle valve is stuck open.

P2119

Electric throttle control 
actuator (bank 1)

A)

Electric throttle control actuator does not function 
properly due to the return spring malfunction.

B)

Throttle valve opening angle in fail-safe mode is 
not in specified range.

C)

ECM detects that the throttle valve is stuck open.

EC-1014

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

P1238, P2119 ELECTRIC THROTTLE CONTROL ACTUATOR

5.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-1014, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005237502

1.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1.

Turn ignition switch OFF.

2.

Remove the intake air duct.

3.

Check that no foreign matter is caught between the throttle valve
(1) and the housing.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Remove the foreign matter and clean the electric throttle

control actuator inside.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace malfunctioning electric throttle control actuator.

2.

Perform 

EC-1014, "Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000005237503

1.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to 

EC-581, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.

2.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-582, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

JMBIA1556ZZ

P1239, P2135 TP SENSOR

EC-1015

< DTC/CIRCUIT DIAGNOSIS >

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P1239, P2135 TP SENSOR

Description

INFOID:0000000005237504

Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement. 
The throttle position sensor has two sensors. These sensors are a
kind of potentiometer which transform the throttle valve position into
output voltage, and emit the voltage signal to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and controls the throttle valve opening angle in response to
driving conditions via the throttle control motor.

DTC Logic

INFOID:0000000005237505

DTC DETECTION LOGIC

NOTE:
If DTC P1239 or P2135 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to 

EC-965, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test. 
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and let it idle for 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-1015, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005237506

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection M95. Refer to Ground Inspection in 

GI-39, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

PBIB0145E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1239

Throttle position sensor 
(bank 2) circuit range/
performance

Rationally incorrect voltage is sent to ECM 
compared with the signals from TP sensor 1 
and TP sensor 2.

• Harness or connector

(Throttle position sensor 1 or 2 circuit is open 
or shorted.)

• Electric throttle control actuator

(Throttle position sensor 1 or 2)

P2135

Throttle position sensor 
(bank 1) circuit range/
performance

EC-1016

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

P1239, P2135 TP SENSOR

NO

>> Repair or replace ground connection.

2.

CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-I

1.

Disconnect electric throttle control actuator harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between electric throttle control actuator harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

3.

CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

4.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

4.

CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

2.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

5.

CHECK THROTTLE POSITION SENSOR

Refer to 

EC-1017, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 6.

6.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace malfunctioning electric throttle control actuator.

DTC

Electric throttle control actuator

Ground

Voltage (V)

Bank

Connector

Terminal

P1239

2

F64

2

Ground

Approx. 5

P2135

1

F66

2

DTC

Electric throttle control actuator

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P1239

2

F64

4

F111

72

Existed

P2135

1

F66

4

71

DTC

Electric throttle control actuator

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P1239

2

F64

1

F111

77

Existed

3

74

P2135

1

F66

1

73

3

78

 

 

 

 

 

 

 

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