DTC U0232: Lost Communication with Blind Spot Monitor Slave Module [08/2013 - ]: Procedure
WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH - BLIND SPOT MONITOR SENSOR LH)
- Disconnect the U9 blind spot monitor sensor RH connector.
- Disconnect the U8 blind spot monitor sensor LH connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition U9-1 (CA2P) - U8-1 (CA2P) Always Below 1 Ω U9-6 (CA2N) - U8-6 (CA2N) Always Below 1 Ω
NG → REPAIR OR REPLACE CAN LINE OR CONNECTOR
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition U9-5 (BRB) - Body ground Power switch on (IG) 11 to 14 V
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- Measure the voltage according to the value(s) in the table below.
- CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition U9-10 (BRGD) - Body ground Always Below 1 Ω
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- Measure the resistance according to the value(s) in the table below.
- REPLACE BLIND SPOT MONITOR SENSOR RH
- Replace the blind spot monitor sensor RH. Refer to REMOVAL [08/2013 - ] .
NEXT: Go to next step
- CHECK DTC
- Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .
- Recheck for DTCs and check if the same DTC is output again.
OK
No DTCs are output.
NG → See step 6
OK → END (BLIND SPOT MONITOR SENSOR RH WAS DEFECTIVE)
- REPLACE BLIND SPOT MONITOR SENSOR LH. Refer to REMOVAL [08/2013 - ]