Lexus IS250 IS220d GSE20 ALE20 - SUPPLEMENTAL RESTRAINT SYSTEM
CHECK CONNECTION OF CONNECTORS
CHECK FLOOR WIRE NO. 2 (SHORT)
CHECK FLOOR WIRE NO. 2 (SHORT TO B+)
CHECK FLOOR WIRE NO. 2 (SHORT TO GROUND)
CHECK FRONT SEAT INNER BELT ASSEMBLY (DRIVER SIDE)
REPLACE FRONT SEAT INNER BELT ASSEMBLY (DRIVER SIDE)
CHECK CENTER AIRBAG SENSOR ASSEMBLY
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 (driver side).
DTC B1655/37 is recorded when a malfunction is detected in the driver side seat belt buckle switch circuit.
| DTC No. | DTC Detection Condition | Trouble Area |
| B1655/37 | The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the driver side seat belt buckle switch circuit for 2 seconds. Front seat inner belt assembly LH malfunction Center airbag sensor assembly malfunction | Floor wire No. 2 Front seat inner belt assembly (Driver side seat belt buckle switch) Center airbag sensor assembly |
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK DTC |
Turn the engine switch on (IG), and wait for at least 60 seconds.
Clear the DTCs stored in the memory .
Turn the engine switch off.
Turn the engine switch on (IG), and wait for at least 60 seconds.
Check for DTCs .
- 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.
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| OK | ||
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| 2.CHECK CONNECTION OF CONNECTORS |
Turn the engine switch off.
Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
Check that the connectors are properly connected to the center airbag sensor assembly and the front seat inner belt assembly (driver side).
- OK:
- The connectors are properly connected.
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| OK | ||
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| 8.REPLACE FRONT SEAT INNER BELT ASSEMBLY (DRIVER SIDE) |
Turn the engine switch off.
Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
Replace the front seat inner belt assembly (driver side) .
- HINT:
- Perform inspection using parts from a normal vehicle if possible.
| NEXT | |
| 9.CHECK CENTER AIRBAG SENSOR ASSEMBLY |
Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
Turn the engine switch on (IG), and wait for at least 60 seconds.
Clear the DTCs stored in the memory .
Turn the engine switch off.
Turn the engine switch on (IG), and wait for at least 60 seconds.
Check for DTCs .
- 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.
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| OK | ||
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