DTC Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan NV3500 HD, 2018 Nissan NV2500 HD, and 2018 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC OF ECM
With CONSULT
1. Turn ignition switch ON.
2. Perform "Self Diagnostic Results" in "ENGINE".
Is the inspection result normal?

YES

GO TO STEP 2

NO
- Check DTC detected item.
  Refer to DTC Index .
CHECK DTC OF TCM
With CONSULT

Perform "Self Diagnostic Results" in "TRANSMISSION".

Is any DTC other than "P0725" detected?

YES
- Check DTC detected item.
  Refer to DTC Index .
NO

GO TO STEP 3

CHECK THE IGNITION SIGNAL CIRCUIT

With CONSULT

Start the engine.
Select "Data Monitor" in "TRANSMISSION".

Check for engine speed change corresponding to "ACCELE POSI" while monitoring "ENGINE SPEED".

Item name	Condition	Value
ENGINE SPEED	Engine running	Closely matches the tachometer reading.
ACCELE POSI	Released accelerator pedal.	0.0/8
ACCELE POSI	Fully depressed accelerator pedal	8.0/8

Is the inspection result normal?

YES

GO TO STEP 4

Check ignition signal circuit.
Refer to Component Function Check .

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to Diagnosis Procedure .

Is the inspection result normal?

YES

Replace the control valve with TCM. Refer to Exploded View .

NO

Repair or replace damaged parts.