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 (connector side and harness side).
  - Harness connector M133 and fuse block (J/B) side connector
Is the inspection result normal?

YES

GO TO STEP 2 .

NO

Repair the terminal and connector.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Disconnect the fuse block (J/B) harness connector E65 and M133.

Check the continuity between the fuse block (J/B) terminals.

Fuse block (J/B)		Continuity
Terminal No.	Terminal No.	Continuity
6F	6H	Existed
7F	4H	Existed

Is the inspection result normal?

YES

GO TO STEP 3 .

Replace the fuse block (J/B).

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Disconnect the harness connectors B12 and B600.

Check the continuity between the fuse block (J/B) harness connector and the harness connector.

Fuse block (J/B) harness connector		Harness connector		Continuity
Connector No.	Terminal No.	Connector No.	Terminal No.
M133	6H	B12	1	Existed
	4H		17	Existed

Is the inspection result normal?

YES (Present error)

Check CAN system type decision again.

YES (Past error)

Error was detected in the main line between the ABS actuator and electric unit (control unit) and the driver seat control unit.

Repair the main line between the fuse block (J/B) harness connector M133 and the harness connector B12.