Nissan Frontier D22. Manual - part 622

DTC P0600 A/T COMMUNICATION LINE

EC-1591

[VG33ER]

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Diagnostic Procedure

UBS00DZL

1. 

CHECK A/T CONTROL INPUT SIGNAL CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector and TCM (Transmission
Control Module) harness connector.

3.

Check harness continuity between ECM terminal 26 and TCM
terminal 5, ECM terminal 27 and TCM terminal 6, ECM terminal
35 and TCM terminal 7.
Refer to Wiring Diagram.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

 DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors M58, F28

●

Harness for open or short between ECM and  TCM (Transmission Control Module)

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

3. 

CHECK A/T CONTROL INPUT SIGNAL CIRCUIT FOR SHORT

1.

Check harness continuity between ECM terminal 26 and ground, ECM terminal 27 and ground, ECM ter-
minal 35 and ground.
Refer to Wiring Diagram.

2.

Also check harness for short to power.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

68

W/G

A/T signal

[Engine is running]

●

Idle speed

Approximately 0 - 5.0V

LEC106A

Continuity should exist.

AEC655A

Continuity should not exist.

EC-1592

[VG33ER]

DTC P0600 A/T COMMUNICATION LINE

4. 

DETECT MALFUNCTIONING PART

Check the harness for open or short between ECM and  TCM (Transmission Control Module).

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

5. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-1297, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END.

DTC P0605 ECM

EC-1593

[VG33ER]

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DTC P0605 ECM

PFP:23710

Component Description

UBS00DZM

The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The unit controls the engine.

On Board Diagnosis Logic

UBS00DZN

DTC Confirmation Procedure

UBS00DZO

NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 5 seconds before conducting the next test.

 WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Start engine.

4.

Run engine for at least 2 seconds at idle speed.

5.

 If 1st trip DTC is detected, go to 

EC-1594, "Diagnostic Proce-

dure"

 .

 WITH GST

Follow the procedure “WITH CONSULT-II”.

SEC220B

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0605

Engine control module

ECM calculation function is malfunctioning.

●

ECM

SEF058Y

EC-1594

[VG33ER]

DTC P0605 ECM

Diagnostic Procedure

UBS00DZP

1. 

INSPECTION START

 With CONSULT-II

1.

Turn ignition switch ON.

2.

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

3.

Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.
See 

EC-1593, "DTC Confirmation Procedure"

 .

5.

Is the 1st trip DTC P0605 displayed again?

 With GST

1.

Turn ignition switch ON.

2.

Select MODE 4 with GST.

3.

Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.
See 

EC-1593, "DTC Confirmation Procedure"

 .

5.

Is the 1st trip DTC P0605 displayed again?

Yes or No

Yes

>> Replace ECM.

No

>> INSPECTION END.