Lexus IS250 IS220d GSE20 ALE20 - PRE-CRASH SAFETY
INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH
CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU)
DTC B2000 Short to B+ in Seat Belt Motor RH Circuit
DESCRIPTION
The seat belt control ECU receives information from the distance control ECU through CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly RH.
- CAUTION:
- The pretensioner is built into the front seat outer belt assembly RH. Be sure to follow the correct inspection procedure, as failure to follow the correct procedure (such as inspection of incorrect connectors) may deploy the pretensioner.
| DTC No. | DTC Detection Condition | Trouble Area |
| B2000 | Short to B+ in the seat belt motor RH circuit continues for 1 second or more Short in the seat belt motor RH circuit | Front seat outer belt assembly RH Wire harness (seat belt control ECU - front seat outer belt assembly RH) Seat belt control ECU |
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed .
| 1.INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH |
Disconnect the P8 connector of the front seat outer belt assembly RH.
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester Connection Condition Specified Condition P8-1 - Body ground Engine switch on (IG) Below 1 V P8-2 - Body ground Engine switch on (IG) Below 1 V
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| OK | |
| 2.CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU) |
Disconnect the negative (-) battery terminal .
Disconnect the O38 connector of the seat belt control ECU.
Connect the negative (-) terminal to the battery.
Measure the voltage according to the value(s) in the table below.
- Standard voltage :
Tester Connection Condition Specified Condition P8-1 - Body ground Engine switch on (IG) Below 1 V P8-2 - Body ground Engine switch on (IG) Below 1 V
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| OK | ||
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