Infiniti QX56 (Z62). Manual - part 624

EC-474

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P2127, P2128 APP SENSOR

>> INSPECTION END

Component Inspection (Accelerator Pedal Position Sensor)

INFOID:0000000006217977

1.

CHECK ACCELERATOR PEDAL POSITION SENSOR

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Turn ignition switch ON.

4.

Check the voltage ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE ACCELERATOR PEDAL ASSEMBLY

Replace accelerator pedal assembly. Refer to 

ACC-3, "MODELS WITHOUT DISTANCE CONTROL ASSIST

SYSTEM : Removal and Installation"

 (Without distance control assist system) or 

ACC-4, "MODELS WITH

DISTANCE CONTROL ASSIST SYSTEM : Removal and Installation"

 (With distance control assist system).

>> INSPECTION END

ECM

Condition

Voltage (V)

Connector

+

–

Terminal

Terminal

E80

136 (APP sensor 1)

140

Accelerator pedal

Fully released

0.65 - 0.87

Fully depressed

4.3 - 4.8

126 (APP sensor 2)

129

Fully released

0.28 - 0.48

Fully depressed

2.0 - 2.5

P2135 TP SENSOR

EC-475

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P2135 TP SENSOR

DTC Logic

INFOID:0000000006217978

DTC DETECTION LOGIC

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

EC-

381, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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 8 V or more 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-475, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006217979

1.

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 2.

NO

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

2.

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.

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P2135

TP SENSOR-B1
(Throttle position sensor 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

(TP sensor 1 or 2 circuit is open or shorted.)

• Electric throttle control actuator

(TP sensor 1 or 2)

Electric throttle control actuator

Ground

Voltage (V)

Connector

Terminal

F66

2

Ground

Approx. 5

EC-476

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P2135 TP SENSOR

4.

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

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 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 4.

NO

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

4.

CHECK THROTTLE POSITION SENSOR

Refer to 

EC-476, "Component Inspection (Throttle Position Sensor)"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

Replace electric throttle control actuator. Refer to 

EM-30, "Removal and Installation"

.

>> INSPECTION END

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection (Throttle Position Sensor)

INFOID:0000000006217980

1.

CHECK THROTTLE POSITION SENSOR

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Perform 

EC-147, "Work Procedure"

.

4.

Turn ignition switch ON.

5.

Set selector lever position to D.

6.

Check the voltage between ECM harness connector terminals under the following conditions.

Electric throttle control actuator

ECM

Continuity

Connector

Terminal

Connector

Terminal

F66

4

F110

97

Existed

Electric throttle control actuator

ECM

Continuity

Connector

Terminal

Connector

Terminal

F66

1

F110

91

Existed

3

79

P2135 TP SENSOR

EC-477

< DTC/CIRCUIT DIAGNOSIS >

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EC

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Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

Replace electric throttle control actuator. Refer to 

EM-30, "Removal and Installation"

.

>> INSPECTION END

ECM

Condition

Voltage (V)

Connector

+

–

Terminal

Terminal

F110

91

(TP sensor 1 signal)

97

(Sensor ground)

Accelerator pedal

Fully released

More than 0.36

Fully depressed

Less than 4.75

79

(TP sensor 2 signal)

Fully released

Less than 4.75

Fully depressed

More than 0.36