Lexus ES: Lost Communication with Brake System Control Module (U0129)
DESCRIPTION
The tire pressure warning ECU and receiver receives signals from the skid control ECU (brake booster with master cylinder assembly) via CAN communication system.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
| U0129 | Lost Communication with Brake System Control Module | Lost communication with skid control ECU (brake booster with master cylinder assembly) | -
CAN communication system
-
Skid control ECU (Brake booster with master cylinder assembly)
| - |
PROCEDURE
| 1. | GO TO CAN COMMUNICATION SYSTEM |
(a) Go to CAN communication system.
Click here
| NEXT | | END |
READ NEXT:
DESCRIPTION The tire pressure warning ECU and receiver identifies the tire position for each tire pressure warning valve and transmitter according to the wheel speed signals from the skid control ECU
DESCRIPTION If the tire pressure warning ECU and receiver detects any problems, the tire pressure warning light blinks for 1 minute then illuminates, and tire pressure monitoring is disabled at the sa
DESCRIPTION When "Change Wheel Set" is selected on the multi-information display and the "OK" switch (steering pad switch assembly) is pushed and held, the system enters ID registration mode and the t
SEE MORE:
SYSTEM DIAGRAM Communication Table Sender Receiver Signal Line Main Body ECU (Multiplex Network Body ECU) Sliding Roof ECU (Sliding Roof Drive Gear Assembly)
Sliding roof operation permission signal
IG signal
Front door courtesy light switch assembly signal
Vehicle speed
DESCRIPTION The speed sensors monitor the speed of the wheels and send an appropriate speed signal to the absorber control ECU through the skid control ECU (brake actuator assembly). If a malfunction occurs in either a front speed sensor or rear speed sensor, DTC C1783 is stored. DTC No. Detect
© 2016-2026 Copyright www.lexguide.net
