Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti QX60. 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).
  - Pre - crash seat belt control unit (driver side)
  - CAN gateway
Is the inspection result normal?

YES

GO TO STEP 2 .

NO

Repair the terminal and connector.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Disconnect the connector of CAN gateway.

Check the continuity between the CAN gateway harness connector terminals.

CAN gateway harness connector			Continuity
Connector No.	Terminal No.
M5	4	6	Existed
	10	12	Existed

Is the inspection result normal?

YES

GO TO STEP 3 .

Check the harness and repair the root cause (CAN communication circuit 2 side).

CHECK HARNESS FOR OPEN CIRCUIT

Connect the connector of CAN gateway.
Disconnect the connector of pre - crash seat belt control unit (driver side).

Check the resistance between the pre - crash seat belt control unit (driver side) harness connector terminals.

Pre - crash seat belt control unit (driver side) harness connector			Resistance (Ω)
Connector No.	Terminal No.
B58	14	4	Approx. 54 - 66

Is the measurement value within the specification?

YES

GO TO STEP 4 .

Repair the pre - crash seat belt control unit (driver side) branch line.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the pre - crash seat belt control unit (driver side). Refer to DIAGNOSIS PROCEDURE .

Is the inspection result normal?

YES (Present error)

Replace the front seat belt retractor (LH side). Refer to FRONT SEAT BELT .

YES (Past error)

Error was detected in the pre - crash seat belt control unit (driver side) branch line.

NO

Repair the power supply and the ground circuit.