Nissan Quest E52. Manual - part 531

EC-334

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0603 ECM POWER SUPPLY

2.

Erase DTC.

3.

Perform DTC CONFIRMATION PROCEDURE.
See 

EC-333, "DTC Logic"

.

Is the 1st trip DTC P0603 displayed again?

YES

>> Replace ECM. Refer to 

EC-460, "Removal and Installation"

.

NO

>> INSPECTION END

P0605 ECM

EC-335

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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EC

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P0605 ECM

DTC Logic

INFOID:0000000009651170

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing 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.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A

1.

Turn ignition switch ON.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

EC-335, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B

1.

Turn ignition switch ON and wait at least 1 second.

2.

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

3.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

EC-335, "Diagnosis Procedure"

.

NO

>> GO TO 4.

4.

PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION C

1.

Turn ignition switch ON and wait at least 1 second.

2.

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

3.

Repeat step 2 for 32 times.

4.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

EC-335, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009651171

1.

INSPECTION START

1.

Turn ignition switch ON.

2.

Erase DTC.

3.

Perform DTC CONFIRMATION PROCEDURE.
See 

EC-335, "DTC Logic"

.

Is the 1st trip DTC P0605 displayed again?

YES

>> Replace ECM. Refer to 

EC-460, "Removal and Installation"

.

NO

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0605

Engine control module

A)

ECM calculation function is malfunctioning.

• ECM

B)

ECM EEP-ROM system is malfunctioning.

C)

ECM self shut-off function is malfunctioning.

EC-336

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0607 ECM

P0607 ECM

DTC Logic

INFOID:0000000009651172

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

EC-336, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009651173

1.

INSPECTION START

1.

Turn ignition switch ON.

2.

Erase DTC.

3.

Perform DTC CONFIRMATION PROCEDURE.
See 

EC-336, "DTC Logic"

.

4.

Check DTC.

Is the DTC P0607 displayed again?

Yes

>> Replace ECM. Refer to 

EC-460, "Removal and Installation"

.

No

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0607

CAN communication bus

When detecting error during the initial diagno-
sis of CAN controller of ECM.

• ECM

P0643 SENSOR POWER SUPPLY

EC-337

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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P0643 SENSOR POWER SUPPLY

DTC Logic

INFOID:0000000009651174

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing 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 10 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

>> Proceed to 

EC-337, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009651175

1.

CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY

1.

Disconnect accelerator pedal position (APP) sensor harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between APP sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 2.

2.

CHECK SENSOR POWER SUPPLY CIRCUIT

Check harness for short to power and short to ground, between the following terminals.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P0643

Sensor power supply 
circuit short

ECM detects that the voltage of power 
source for sensor is excessively low or high.

• Harness or connectors

(APP sensor 1 circuit is shorted.)
(TP sensor circuit is shorted.)
[CMP sensor (PHASE) circuit is shorted.)
(Battery current sensor circuit is shorted.)

• Accelerator pedal position sensor
• Throttle position sensor
• Camshaft position sensor (PHASE)
• Battery current sensor

APP sensor

Ground

Voltage (V)

Connector

Terminal

E110

4

Ground

Approx. 5