Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti Q50. 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 12V 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 F11
  - Harness connector E9
Is the inspection result normal?

YES

GO TO STEP 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.

ECM harness connector			Resistance (Ω)
Connector No.	Terminal No.
F10	55	54	Approx. 108 - 132

Is the measurement value within the specification?

YES

GO TO STEP 3 .

Repair the ECM branch line (HEV system CAN circuit side).

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ECM. Refer to DIAGNOSIS PROCEDURE .

Is the inspection result normal?

YES (Present error)

Replace the ECM. Refer to REMOVAL AND INSTALLATION .

YES (Past error)

Error was detected in the ECM branch line (HEV system CAN circuit side).

NO

Repair the power supply and the ground circuit.