DTC U0129: Lost Communication with Skid Control ECU [03/2017 - 05/2023]: Procedure
- CHECK FOR DTCs
- Check for DTCs.
Result
Result Proceed to DTC U0129 is output from driving support ECU assembly only. A DTC U0129 is output from any ECU. B
Result:
B
See step 3
Result:
A
See step 2
- Check for DTCs.
- CHECK FOR OPEN IN CAN BUS WIRE (DRIVING SUPPORT ECU ASSEMBLY BRANCH WIRE)
- Disconnect the cable from the negative (-) battery terminal.
- Disconnect the driving support ECU assembly connector.
*a Front view of wire harness connector
(to Driving Support ECU Assembly) - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition P62-12 (CA3H) - P62-13 (CA3L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω Result
Result OK NG
Result:
OK
REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to REMOVAL [03/2017 - 05/2023]
Result:
NG
REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR
- CHECK FOR OPEN IN CAN BUS WIRE (SKID CONTROL ECU ASSEMBLY BRANCH WIRE)
- Disconnect the cable from the negative (-) battery terminal.
- Disconnect the skid control ECU assembly connector.
*a Front view of wire harness connector
(to Skid Control ECU Assembly) - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A9-10 (CA2H) - A9-11 (CA2L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω Result
Result OK NG
Result:
OK
REPLACE SKID CONTROL ECU ASSEMBLY. Refer to REMOVAL [03/2017 - 05/2023]
Result:
NG
REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR