Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).
  - ECM
  - Harness connector E2
  - Harness connector F32
Is the inspection result normal?

YES: GO TO 2.

NO: Repair the terminal and connector.

CHECK HARNESS FOR OPEN CIRCUIT

Disconnect the connector of ECM.

Check the resistance between the ECM harness connector terminals.

VQ engine models

ECM harness connector			Resistance (Ω)
Connector No.	Terminal No.
E16	94	86	Approx. 108 - 132

VK engine models

ECM harness connector			Resistance (Ω)
Connector No.	Terminal No.
E7	94	86	Approx. 108 - 132

Is the measurement value within the specification?

YES: GO TO 3.

NO: Repair the ECM branch line.

CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the ECM. Refer to the following.
- VQ40DE: "DIAGNOSIS PROCEDURE "
- VK56DE: "DIAGNOSIS PROCEDURE "
Is the inspection result normal?

YES (Present error)>>Replace the ECM. Refer to the following.
- VQ40DE: "PROCEDURE AFTER REPLACING ECM "
- VK56DE: "PROCEDURE AFTER REPLACING ECM "
YES (Past error)>>Error was detected in the ECM branch line.

NO: Repair the power supply and the ground circuit.