Front Passenger Side Seat Belt Warning Light Malfunction

METER: METER / GAUGE SYSTEM: Front Passenger Side Seat Belt Warning Light Malfunction

Front Passenger Side Seat Belt Warning Light Malfunction

DESCRIPTION

The occupant classification ECU detects the state of the front seat inner belt assembly (passenger side) when the front passenger seat is occupied with the ignition switch ON. If the front passenger seat belt is not fastened, the front seat belt warning light on the A/C control assembly blinks. If the front passenger seat belt is fastened, the warning light goes off.
HINT: The center airbag sensor assembly uses the front passenger buckle switch signal to control the airbag operation. If there is a communication error between the occupant classification ECU and center airbag sensor assembly, the airbag warning light comes on.

WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: If there is an open in the passenger side buckle switch circuit (front seat inner belt assembly circuit), the occupant classification ECU outputs DTCs. Perform troubleshooting with the "Occupant Classification System" Occupant Classification System.

PROCEDURE

1. CHECK DTC
(a) Check for DTCs.
Result:






B -- GO TO OCCUPANT CLASSIFICATION SYSTEM
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (COMBINATION METER - A/C CONTROL ASSEMBLY)





(a) Disconnect the A7 and C6 connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. INSPECT A/C CONTROL ASSEMBLY
(a) Reconnect the A7 connector.





(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPLACE A/C CONTROL ASSEMBLY
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (COMBINATION METER - CENTER AIRBAG SENSOR ASSEMBLY)





(a) Disconnect the A12 connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. INSPECT COMBINATION METER ASSEMBLY
(a) Reconnect the C6 connector.





(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- Continue to next step.
6. INSPECT CENTER AIRBAG SENSOR ASSEMBLY
(a) Reconnect the A12 connector.





(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
OK -- REPLACE COMBINATION METER ASSEMBLY