Nissan X-Trail 32. Manual - part 812

P2127, P2128 APP SENSOR

EC-377

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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4.

Check the voltage between ECM harness connector terminals as per the following condition.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace accelerator pedal assembly. Refer to 

ACC-4, "Removal and Installation"

.

ECM

Condition

Voltage

(Approx.)

Connector

+

–

Terminal

E16

126

127

Accelerator pedal

Fully released

0.6 - 0.9 V

Fully depressed

3.9 - 4.7 V

119

120

Fully released

0.3 - 0.6 V

Fully depressed

1.95 - 2.4 V

EC-378

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P2135 TP SENSOR

P2135 TP SENSOR

DTC Description

INFOID:0000000010775272

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connector (TP sensor 1 or 2 circuit is open or shorted.)
• Electric throttle control actuator (TP sensor 1 or 2)

FAIL-SAFE

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC PRIORITY

If DTC P2135 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.

Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

EC-321, "DTC Description"

.

NO

>> GO TO 2.

2.

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 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and let it idle for 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

EC-378, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010775273

1.

CHECK DTC PRIORITY

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P2135

TP SENSOR-B1
(Throttle/pedal position sensor/switch “A”/ 
“B” voltage correlation)

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

Engine operating condition in fail-safe mode

Fail safe mode

Vehicle behavior

Others

• The ECM controls the electric throttle control actuator in regulating the throttle opening in order 

for the idle position to be within +10 degrees.

• The ECM regulates the opening speed of the throttle valve to be slower than the normal con-

dition. So, the acceleration will be poor. 

NOTE:
If throttle position sensor1 and 2 malfunction at the same time conducts following control.
• ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed 

opening (approx. 5 degrees) by the return spring.

P2135 TP SENSOR

EC-379

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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If DTC P2135 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.

Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

EC-321, "DTC Description"

.

NO

>> GO TO 2.

2.

CHECK THROTTLE POSITION SENSOR POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect electric throttle control actuator harness connector.

3.

Turn ignition switch ON.

4.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT

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.

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Repair or replace malfunctioning part.

4.

CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT

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 power.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace malfunctioning part.

5.

CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT

1.

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

+

−

Voltage

(Approx.)

Electric throttle control actuator

Connector

Terminal

F29

2

Ground

5 V

+

−

Continuity

Electric throttle control actu-

ator

ECM

Connector

Terminal

Connector

Terminal

F29

2

F8

60

Existed

+

−

Continuity

Electric throttle control actu-

ator

ECM

Connector

Terminal

Connector

Terminal

F29

4

F8

75

Existed

EC-380

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P2135 TP SENSOR

2.

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace malfunctioning part.

6.

CHECK THROTTLE POSITION SENSOR

Check the throttle position sensor. Refer to 

EC-380, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace electric throttle control actuator. Refer to 

EM-33, "Removal and Installation"

.

Component Inspection

INFOID:0000000010775274

1.

CHECK THROTTLE POSITION SENSOR

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Perform “Throttle Valve Closed Position Learning”. Refer to 

EC-145, "Work Procedure"

.

4.

Turn ignition switch ON.

5.

Set selector lever to D position.

6.

Check the voltage between ECM harness connector terminals as per the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace electric throttle control actuator. Refer to 

EM-33, "Removal and Installation"

.

+

−

Continuity

Electric throttle control actu-

ator

ECM

Connector

Terminal

Connector

Terminal

F29

1

F8

63

Existed

3

71

ECM

Condition

Voltage

Connector

+

–

Terminal

F8

63

75

Accelerator pedal

Fully re-
leased

More than 0.36 V

Fully de-
pressed

Less than 4.75 V

71

Fully re-
leased

Less than 4.75 V

Fully de-
pressed

More than 0.36 V