Nissan Pathfinder. Manual — part 511

EC-350

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0605 ECM

P0605 ECM

DTC Logic

INFOID:0000000009178257

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-351, "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-351, "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-351, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009178258

1.

INSPECTION START

1. Turn ignition switch ON.

2. Erase DTC.

3. Perform DTC CONFIRMATION PROCEDURE.

See

EC-351, "DTC Logic"

.

Is the 1st trip DTC P0605 displayed again?

YES

>> Replace ECM. Refer to

EC-466, "Removal and Installation"

.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0605

ECM
(Internal control module read only
memory (ROM) error)

A)

ECM calculation function is malfunctioning.

• ECM

B)

ECM EEP-ROM system is malfunctioning.

C)

ECM self shut-off function is malfunctioning.

P0605 ECM

EC-351

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

NO

>> INSPECTION END

EC-352

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0607 ECM

P0607 ECM

DTC Logic

INFOID:0000000009178259

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-353, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009178260

1.

INSPECTION START

1. Turn ignition switch ON.

2. Erase DTC.

3. Perform DTC CONFIRMATION PROCEDURE.

See

EC-353, "DTC Logic"

.

4. Check DTC.
Is the DTC P0607 displayed again?

Yes

>> Replace ECM. Refer to

EC-466, "Removal and Installation"

.

No

>> INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0607

ECM
(Control module performance)

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

• ECM

P0643 SENSOR POWER SUPPLY

EC-353

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P0643 SENSOR POWER SUPPLY

Description

INFOID:0000000009178261

ECM supplies a voltage of 5 V to some of the sensors systematically divided into 2 groups, respectively.

Accordingly, when a short circuit develops in a sensor power source, a malfunction may occur simultaneously

in the sensors belonging to the same group as the short-circuited sensor.

Sensor power supply 1

• Accelerator pedal position (APP) sensor 1

• Camshaft position (CMP) sensor (PHASE)

• Electric throttle control actuator

• Battery current sensor

NOTE:

If sensor power supply 1 circuit is malfunctioning, DTC P0643 is displayed.

Sensor power supply 2

• Accelerator pedal position (APP) sensor 2

• Crankshaft position (CKP) sensor (POS)

• Refrigerant pressure sensor

• EVAP control system pressure sensor

• Engine oil pressure sensor

DTC Logic

INFOID:0000000009178262

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

1. Start the engine and let it idle for 1 second.

2. Check DTC.
Is DTC detected?

YES

>> Proceed to

EC-354, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009178263

1.

CHECK SENSOR POWER SUPPLY 1

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Turn ignition switch ON.

4. Check the voltage between ECM harness connector and ground.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0643

SENSOR POWER/CIRC
(Sensor reference voltage “A” circuit high)

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

Sensor power supply 1 circuit