Nissan Xterra. Manual - part 309

EC-362

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

P0603 ECM POWER SUPPLY

>> Repair open circuit in harness or connectors.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness or connectors.

4.

PERFORM DTC CONFIRMATION PROCEDURE

 With CONSULT

1. Turn ignition switch ON.

2. Select “SELF DIAG RESULTS” mode with CONSULT.

3. Touch “ERASE”.

4. Perform DTC Confirmation Procedure.

See 

EC-361, "DTC Confirmation Procedure"

.

5. Is the 1st trip DTC P0603 displayed again?

 With GST

1. Turn ignition switch ON.

2. Select Service $04 with GST.

3. Perform DTC Confirmation Procedure.

See 

EC-361, "DTC Confirmation Procedure"

.

4. Is the 1st trip DTC P0603 displayed again?
Yes or No

Yes

>> GO TO 5.

No

>> INSPECTION END

5.

REPLACE ECM

CAUTION:

Perform Additional Service When Replacing ECM. Refer to 

EC-122, "Additional Service When Replac-

ing ECM"

.

Replace ECM.

>> INSPECTION END

P0605 ECM

EC-363

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

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P0605 ECM

Component Description

INFOID:0000000009484082

The ECM consists of a microcomputer and connectors for signal

input and output and for power supply. The ECM controls the engine.

On Board Diagnosis Logic

INFOID:0000000009484083

This self-diagnosis has one or two trip detection logic.

FAIL-SAFE MODE

ECM enters fail-safe mode when the malfunction A is detected.

DTC Confirmation Procedure

INFOID:0000000009484084

Perform PROCEDURE FOR MALFUNCTION A first. If the 1st trip DTC cannot be confirmed, perform

PROCEDURE FOR MALFUNCTION B. If there is no malfunction on PROCEDURE FOR MALFUNCTION

B, perform PROCEDURE FOR MALFUNCTION C.

NOTE:

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

ing the next step.

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.

PROCEDURE FOR MALFUNCTION A

1. Turn ignition switch ON.

2. Check 1st trip DTC.

3. If 1st trip DTC is detected, go to 

EC-364, "Diagnosis Procedure"

.

PROCEDURE FOR MALFUNCTION B

 With CONSULT

1. Turn ignition switch ON and wait at least 1 second.

2. Check 1st trip DTC.

3. If 1st trip DTC is detected, go to 

EC-364, "Diagnosis Procedure"

.

PROCEDURE FOR MALFUNCTION C

 With CONSULT

1. Turn ignition switch ON and wait at least 1 second.

PBIB1164E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0605
0605

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.

Detected items

Engine operation condition in fail-safe mode

Malfunction A

• ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 

degrees) by the return spring.

• ECM deactivates ASCD operation.

EC-364

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

P0605 ECM

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.

5. If 1st trip DTC is detected, go to 

EC-364, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009484085

1.

INSPECTION START

 With CONSULT

1. Turn ignition switch ON.

2. Select “SELF DIAG RESULTS” mode with CONSULT.

3. Touch “ERASE”.

4. Perform DTC Confirmation Procedure.

See 

EC-363, "DTC Confirmation Procedure"

.

5. Is the 1st trip DTC P0605 displayed again?

 With GST

1. Turn ignition switch ON.

2. Select Service $04 with GST.

3. Perform DTC Confirmation Procedure.

See 

EC-363, "DTC Confirmation Procedure"

.

4. Is the 1st trip DTC P0605 displayed again?
Yes or No

Yes

>> GO TO 2.

No

>> INSPECTION END

2.

REPLACE ECM

CAUTION:

Perform Additional Service When Replacing ECM. Refer to 

EC-122, "Additional Service When Replac-

ing ECM"

.

Replace ECM.

>> INSPECTION END

P0607 ECM

EC-365

< DTC/CIRCUIT DIAGNOSIS >

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P0607 ECM

Description

INFOID:0000000009484086

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-

tiplex communication line with high data communication speed and excellent error detection ability. Many elec-

tronic control units are equipped onto a vehicle, and each control unit shares information and links with other

control units during operation (not independent). In CAN communication, control units are connected with 2

communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.

Each control unit transmits/receives data but selectively reads required data only.

On Board Diagnosis Logic

INFOID:0000000009484087

This self-diagnosis has the one trip detection logic.

DTC Confirmation Procedure

INFOID:0000000009484088

1. Turn ignition switch ON.
2. Check DTC.
3. If DTC is detected, go to 

EC-365, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009484089

1.

INSPECTION START

 With CONSULT

1. Turn ignition switch ON.

2. Select “SELF-DIAG RESULTS” mode with CONSULT.

3. Touch “ERASE”.

4. Perform DTC Confirmation Procedure.

See 

EC-365, "DTC Confirmation Procedure"

.

5. Is the DTC P0607 displayed again?

 With GST

1. Turn ignition switch ON.

2. Select “Service $04” with GST.

3. Perform DTC Confirmation Procedure.

See 

EC-365, "DTC Confirmation Procedure"

.

4. Is the DTC P0607 displayed again?
Yes or No

Yes

>> GO TO 2.

No

>> INSPECTION END

2.

REPLACE ECM

CAUTION:

Perform Additional Service When Replacing ECM. Refer to 

EC-122, "Additional Service When Replac-

ing ECM"

.

Replace ECM.

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0607
0607

CAN communication bus

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

• ECM