B1655

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1655/37: Driver Side Seat Belt Buckle Switch Circuit Malfunction

DTC 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.





*1: with Side and curtain shield airbag
*2: without Side and curtain shield airbag

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC





(a) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(b) Clear the DTCs stored in the memory (DTC Check / Clear).
(c) Turn the ignition switch to the LOCK position.
(d) Turn the ignition switch to the ON position, 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.

NG -- CHECK CONNECTION OF CONNECTORS
OK -- USE SIMULATION METHOD TO CHECK
2. CHECK CONNECTION OF CONNECTORS
(a) Turn the ignition switch to the LOCK position.
(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 the front seat inner belt assembly LH.
OK:
The connectors are properly connected.
NG -- CONNECT CONNECTORS, THEN GO TO STEP 1
OK -- Continue to next step.
3. CHECK WIRE HARNESS (OPEN)





(a) Disconnect the connectors from the center airbag sensor assembly and the front seat inner belt assembly LH.
(b) Using a service wire, connect A12-11 (DBE+) and A12-12 (DBE-) of connector "B".

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

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





Result:





C -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE NO. 3
B -- REPAIR OR REPLACE FLOOR WIRE
A -- Continue to next step.
4. CHECK WIRE HARNESS (SHORT)





(a) Disconnect the service wire from connector "B".
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





Result:





C -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE NO. 3
B -- REPAIR OR REPLACE FLOOR WIRE
A -- Continue to next step.
5. CHECK WIRE HARNESS (SHORT TO B+)





(a) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:





Result:





C -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE NO. 3
B -- REPAIR OR REPLACE FLOOR WIRE
A -- Continue to next step.
6. CHECK WIRE HARNESS (SHORT TO GROUND)





(a) Turn the ignition switch to the LOCK position.
(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:





Result:





C -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE NO. 3
B -- REPAIR OR REPLACE FLOOR WIRE
A -- Continue to next step.
7. 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 to the ON position, and wait for at least 60 seconds.
(d) Clear the DTCs stored in the memory (DTC Check / Clear).
(e) Turn the ignition switch to the LOCK position.
(f) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(g) Check the DTCs (DTC Check / Clear).
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 FRONT SEAT INNER BELT ASSEMBLY LH
OK -- USE SIMULATION METHOD TO CHECK
8. REPLACE FRONT SEAT INNER BELT ASSEMBLY LH
(a) Turn the ignition switch to the LOCK position.
(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.
9. 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 to the ON position, and wait for at least 60 seconds.
(c) Clear the DTCs stored in the memory (DTC Check / Clear).
(d) Turn the ignition switch to the LOCK position.
(e) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(f) Check the DTCs (DTC Check / Clear).
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
OK -- END