B1655

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: 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 and the front seat inner belt 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 FOR DTC





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

(b) Clear the DTCs DTC Check / Clear.

(c) Turn the ignition switch off.

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

(e) Check the DTCs DTC Check / Clear.

OK:

DTC B1655/37 is not output.

HINT
DTCs 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
NG -- Continue to next step.

2. CHECK CONNECTION OF CONNECTOR

(a) Turn the ignition switch off.

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

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

OK:

The connectors are properly connected.

NG -- CONNECT CONNECTOR
OK -- Continue to next step.

3. CHECK FLOOR WIRE (OPEN)





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

(b) w/ Side Airbag:

(1) Using a service wire, connect K1-10 (DBE+) and K1-18 (DBE-) of connector B.

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

(c) w/o Side Airbag:

(1) Using a service wire, connect K24-11 (DBE+) and K24-12 (DBE-) of connector B.

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

(d) Measure the resistance of the wire harness side connector.

Standard resistance:





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

4. CHECK FLOOR WIRE (SHORT)





(a) Disconnect the service wire from connector B.

(b) Measure the resistance of the wire harness side connectors.

Standard resistance:





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

5. CHECK FLOOR WIRE (TO B+)





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

(b) Turn the ignition switch to ON.

(c) Measure the voltage of the wire harness side connector.

Standard voltage:





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

6. CHECK FLOOR WIRE (TO GROUND)





(a) Turn the ignition switch off.

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

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





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

7. CHECK FRONT SEAT INNER BELT ASSEMBLY LH





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

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

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

(d) Clear the DTCs DTC Check / Clear.

(e) Turn the ignition switch off.

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

(g) Check the DTCs DTC Check / Clear.

OK:

DTC B1655/37 is not output.

HINT
DTCs 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
NG -- Continue to next step.

8. REPLACE FRONT SEAT INNER BELT ASSEMBLY LH

(a) Turn the ignition switch off.

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

(c) Replace the front seat inner belt LH Components.

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

NEXT -- Continue to next step.

9. CHECK CENTER AIRBAG SENSOR ASSEMBLY





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

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

(c) Clear the DTCs DTC Check / Clear.

(d) Turn the ignition switch off.

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

(f) Check the DTCs DTC Check / Clear.

OK:

DTC B1655/37 is not output.

HINT
DTCs 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

OK -- END