Inspection Procedure

1. Clear the DTC (see DTC CHECK / CLEAR ).
2. Check for DTC (see DTC CHECK / CLEAR ).

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   DTC B1771 is not output	A
   DTC B1771 is output	B

B: GO TO OCCUPANT CLASSIFICATION SYSTEM 

A: GO TO NEXT STEP 

1. Disconnect the C10 meter connector.
2. Using a service wire, connect the meter terminal 30 on the wire harness side and body ground.
3. Check that the passenger seat belt warning light turns on.

   OK: Front passenger seat belt warning light turns on. 

NG: Go to step   4 

Fig 1: Identifying C10 Meter Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP 

1. Disconnect the A18 sensor connector.
2. Disconnect the C10 meter connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   A18-13 (PBEW) - C10-7	Below 1 Ω

   Fig 2: Identifying A18 Sensor And C10 Meter Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: REPLACE COMBINATION METER ASSEMBLY 

1. Disconnect the F11 warning light connector.
2. Disconnect the C10 meter connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   F11-4 (PBEW) - C10-30	Below 1 Ω

4. Measure the voltage of the wire harness side connector.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   F11-6 (IG+) - Body ground	10 to 14 V

   Fig 3: Identifying F11 Warning Light And C10 Meter Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: REPLACE FRONT PASSENGER SEAT BELT WARNING LIGHT