Diagnosis Procedure

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

CHECK POWER SUPPLY AND GROUND CIRCUIT
Check pre-crash seat belt control unit power supply and ground circuit. Refer to Diagnosis Procedure .

Is the inspection result normal?

YES

GO TO 2.

NO

Repair or replace malfunctioning parts.

CHECK LOCAL COMMUNICATION LINE CIRCUIT

Turn ignition switch OFF.
Disconnect pre-crash seat belt control unit LH and RH harness connector.

Check continuity between pre-crash seat belt control unit LH harness connector and pre-crash seat belt control unit RH.

Pre-crash seat belt control unit LH		Pre-crash seat belt control unit RH		Continuity
Connector	Terminal	Connector	Terminal
B58	8	B160	8	Yes
	16		16

Check continuity between pre-crash seat belt control unit LH harness connector and ground.

Pre-crash seat belt control unit LH		Ground	Continuity
Connector	Terminal
B58	8		No
	16

Is the inspection result normal?

YES

GO TO 3.

Repair or replace harness or connector.

REPLACE PRE-CRASH SEAT BELT CONTROL UNIT RH
1. Replace pre-crash seat belt control unit RH. Refer to Removal and Installation .
2. Check Self-diagnostic result with CONSULT.
Is DTC detected?

YES

GO TO 4.

NO

Inspection End.
REPLACE PRE-CRASH SEAT BELT CONTROL UNIT LH
1. Replace pre-crash seat belt control unit LH. Refer to Removal and Installation .
2. Check Self-diagnostic result with CONSULT.
Is DTC detected?

YES

GO TO 5.

NO

Inspection End.
CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident .

Inspection End.