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Front Passenger Side Seat Belt Warning Light Malfunction








SEAT BELT: SEAT BELT WARNING SYSTEM: Front Passenger Side Seat Belt Warning Light Malfunction

Front Passenger Side Seat Belt Warning Light Malfunction

DESCRIPTION
- When the ignition switch is ON and the front passenger seat is occupied, the center airbag sensor assembly communicates the status of the front seat inner belt assembly RH to the main body ECU using the CAN communication line. The main body ECU receives signals from the center airbag sensor assembly and transmits them to the combination meter assembly. When the seat belt is unfastened, the combination meter assembly flashes the front passenger seat belt warning light on the instrument panel finish panel end RH*1 or hazard warning signal switch assembly*2. When the seat belt is fastened, the combination meter assembly stops flashing the front passenger seat belt warning light on the instrument panel finish panel end RH*1 or hazard warning signal switch assembly*2.
HINT: *1: Hatchback

*2: Sedan

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK SUPPLEMENTAL RESTRAINT SYSTEM
(a) Check for DTCs.
Result:






B -- GO TO SUPPLEMENTAL RESTRAINT SYSTEM
A -- Continue to next step.
2. CHECK OCCUPANT CLASSIFICATION SYSTEM
(a) Check for DTCs.
Result:






B -- GO TO OCCUPANT CLASSIFICATION SYSTEM
A -- Continue to next step.
3. READ VALUE USING TECHSTREAM (P BUCKLE SW)
(a) Using the Techstream, read the Data List.
Center Airbag Sensor Assembly:






OK:
Front seat inner belt assembly RH operates normally.
OK -- PERFORM ACTIVE TEST USING TECHSTREAM (P-BELT REMIND)
NG -- Continue to next step.
4. CHECK FRONT SEAT INNER BELT ASSEMBLY RH




(a) Disconnect the J11 front seat inner belt assembly RH connector.
(b) Measure the resistance.
Standard resistance:





(c) Reconnect the front seat inner belt assembly RH connector.
NG -- REPLACE FRONT SEAT INNER BELT ASSEMBLY RH
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (ECU - FRONT SEAT INNER BELT ASSEMBLY RH)




(a) Disconnect the J24 occupant classification ECU connector.
(b) Disconnect the J11 front seat inner belt assembly RH connector.
(c) Measure the resistance.
Standard resistance:





(d) Reconnect the occupant classification ECU connector.
(e) Reconnect the front seat inner belt assembly connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. CHECK HARNESS AND CONNECTOR (CENTER AIRBAG SENSOR ASSEMBLY - OCCUPANT CLASSIFICATION ECU)




(a) Disconnect the J9 center airbag sensor assembly connector.
(b) Disconnect the J24 occupant classification ECU connector.
(c) Measure the resistance.
Standard resistance:





(d) Reconnect the center airbag sensor assembly connector.
(e) Reconnect the occupant classification ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE OCCUPANT CLASSIFICATION ECU
7. PERFORM ACTIVE TEST USING TECHSTREAM (P-BELT REMIND)
(a) Operate a Techstream according to the steps on the display and select "Active Test".
Combination Meter Assembly:






OK:
Front passenger seat belt warning light comes on.
NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- Continue to next step.
8. INSPECT FUSE (GAUGE)
(a) Remove the GAUGE fuse from the main body ECU.
(b) Measure the resistance.
Standard resistance:
Below 1 Ohms
(c) Reinstall the GAUGE fuse.
NG -- REPLACE FUSE
OK -- Continue to next step.
9. INSPECT FRONT PASSENGER SEAT BELT WARNING LIGHT
(a) Hatchback:





(1) Remove the front passenger seat belt warning light.
(2) Apply battery voltage to the terminals and check that the indicator illuminates.
Standard:






(3) Reinstall the front passenger seat belt warning light.
(b) Sedan:





(1) Remove the hazard warning signal switch assembly.
(2) Apply battery voltage to the terminals and check that the indicator illuminates.
Standard:






(3) Reinstall the hazard warning signal switch assembly.
NG -- REPLACE FRONT PASSENGER SEAT BELT WARNING LIGHT
OK -- Continue to next step.
10. CHECK HARNESS AND CONNECTOR (FUSE - FRONT PASSENGER SEAT BELT WARNING LIGHT)
(a) Hatchback:





(1) Disconnect the D27 front passenger seat belt warning light connector.
(2) Disconnect the 4S main body ECU connector.
(3) Measure the resistance.
Standard resistance:






(4) Reconnect the front passenger seat belt warning light connector.
(5) Reconnect the main body ECU connector.
(b) Sedan:





(1) Disconnect the D77 hazard warning signal switch assembly connector.
(2) Disconnect the 4S main body ECU connector.
(3) Measure the resistance.
Standard resistance:






(4) Reconnect the hazard warning signal switch assembly connector.
(5) Reconnect the main body ECU connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
11. CHECK HARNESS AND CONNECTOR (SEAT BELT WARNING LIGHT - COMBINATION METER ASSEMBLY)
(a) Hatchback:





(1) Disconnect the D2 combination meter assembly connector.
(2) Disconnect the D27 front passenger seat belt warning light connector.
(3) Measure the resistance.
Standard resistance:






(4) Reconnect the combination meter assembly connector.
(5) Reconnect the front passenger seat belt warning light connector.
(b) Sedan:





(1) Disconnect the D76 combination meter assembly connector.
(2) Disconnect the D77 hazard warning signal switch assembly connector.
(3) Measure the resistance.
Standard resistance:






(4) Reconnect the combination meter assembly connector.
(5) Reconnect the hazard warning signal switch assembly connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU
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