Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. 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.

2. CHECK LOCAL COMMUNICATION LINE CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect pre-crash seat belt control unit (driver side and passenger side) harness connector.
   3. Check continuity between pre-crash seat belt control unit (driver side) harness connector and pre-crash seat belt control unit (passenger side).

      Pre-crash seat belt control unit (driver side)		Pre-crash seat belt control unit (passenger side)		Continuity
      Connector	Terminal	Connector	Terminal
      B58	8	B160	8	Yes
      	16		16

   4. Check continuity between pre-crash seat belt control unit (driver side) harness connector and ground.

      Pre-crash seat belt control unit (driver side)		Ground	Continuity
      Connector	Terminal
      B58	8		No
      	16

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair or replace harness or connector.

3. REPLACE PRE-CRASH SEAT BELT CONTROL UNIT (PASSENGER SIDE) 
   1. Replace pre-crash seat belt control unit (passenger side). Refer to "REMOVAL AND INSTALLATION ".
   2. Check Self-diagnostic result with CONSULT.

      Is DTC detected? 

      YES: GO TO 4.

      NO: Inspection End.

4. REPLACE PRE-CRASH SEAT BELT CONTROL UNIT (DRIVER SIDE) 
   1. Replace pre-crash seat belt control unit (driver side). Refer to "REMOVAL AND INSTALLATION ".
   2. Check Self-diagnostic result with CONSULT.

      Is DTC detected? 

      YES: GO TO 5.

      NO: Inspection End.

5. CHECK INTERMITTENT INCIDENT 

   Refer to "INTERMITTENT INCIDENT ".

   : Inspection End.