Driver Side Seat Belt Buckle Switch Circuit Malfunction - Airbag System (for TMC Made)

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM (for TMC Made): B1655/37: Driver Side Seat Belt Buckle Switch Circuit Malfunction
B1655/37 - Driver Side Seat Belt Buckle Switch Circuit Malfunction

DESCRIPTION

The driver side seat belt buckle switch circuit consists of the center airbag sensor assembly and the front seat inner belt assembly LH.

DTC B1655/37 is recorded when a malfunction is detected in the driver side seat belt buckle switch circuit.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC

(a) Turn the ignition switch on (IG), and wait for at least 60 seconds.





(b) Clear the DTCs stored in the memory Airbag System (for TMC Made).

(c) Turn the ignition switch off.

(d) Turn the ignition switch on (IG), and wait for at least 60 seconds.

(e) Check the DTCs Check Mode Procedure.

OK:

DTC B1655/37 is not output.

HINT
Codes other than DTC B1655/37 may be output at this time, but they are not related to this check.

OK -- USE SIMULATION METHOD TO CHECK Diagnosis System
NG -- Continue to next step.

2. CHECK CONNECTION OF CONNECTORS

(a) Turn the ignition switch off.

(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

(c) Check that the connectors are properly connected to the center airbag sensor assembly and front seat inner belt assembly LH.

OK:

The connectors are properly connected.

NG -- CONNECT CONNECTORS PROPERLY, THEN GO TO STEP 1
OK -- Continue to next step.

3. CHECK CONNECTORS

(a) Disconnect the connectors from the center airbag sensor assembly and the front seat inner belt assembly LH.

(b) Check that the connectors (on the center airbag sensor assembly side and front seat inner belt assembly LH side) are not damaged.

OK:

The connectors are not deformed or damaged.

NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.

4. CHECK FLOOR WIRE (OPEN)

(a) Using a service wire, connect terminals 11 (DBE+) and 12 (DBE-) of connector B.





NOTICE:
Do not forcibly insert a service wire into the terminals of the connector when connecting.

(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.

5. CHECK FLOOR WIRE (SHORT)

(a) Disconnect the service wire from connector B.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.

6. CHECK FLOOR WIRE (SHORT TO B+)

(a) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.





(b) Turn the ignition switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard voltage:





NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.

7. CHECK FLOOR WIRE (SHORT TO GROUND)

(a) Turn the ignition switch off.





(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE FLOOR WIRE
OK -- Continue to next step.

8. CHECK FRONT SEAT INNER BELT ASSEMBLY LH

(a) Connect the connector to the center airbag sensor assembly and the front seat inner belt assembly LH.





(b) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

(c) Turn the ignition switch on (IG), and wait for at least 60 seconds.

(d) Clear the DTCs stored in the memory Airbag System (for TMC Made).

(e) Turn the ignition switch off.

(f) Turn the ignition switch on (IG), and wait for at least 60 seconds.

(g) Check the DTCs Airbag System (for TMC Made).

OK:

DTC B1655/37 is not output.

HINT
Codes other than DTC B1655/37 may be output at this time, but they are not related to this check.

OK -- USE SIMULATION METHOD TO CHECK Diagnosis System
NG -- Continue to next step.

9. REPLACE FRONT SEAT INNER BELT ASSEMBLY LH

(a) Turn the ignition switch off.

(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

(c) Replace the front seat inner belt assembly LH Removal.

HINT
Perform inspection using parts from a normal vehicle if possible.

NEXT -- Continue to next step.

10. CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.





(b) Turn the ignition switch on (IG), and wait for at least 60 seconds.

(c) Clear the DTCs stored in the memory Airbag System (for TMC Made).

(d) Turn the ignition switch off.

(e) Turn the ignition switch on (IG), and wait for at least 60 seconds.

(f) Check the DTCs Airbag System (for TMC Made).

OK:

DTC B1655/37 is not output.

HINT
Codes other than DTC B1655/37 may be output at this time, but they are not related to this check.

NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

OK -- END