Lexus ES: Lost Communication with Brake System Control Module (U0129,U0140,U0293)
DESCRIPTION
These DTCs are stored when the CAN communication system is malfunctioning.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U0129 | Lost Communication with Brake System Control Module | The vehicle approaching speaker controller does not receive data from the skid control ECU (brake booster with master cylinder assembly) for approximately 10 seconds or more. |
|
| U0140 | Lost Communication with Body Control Module | The vehicle approaching speaker controller does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more. |
|
| U0293 | Lost Communication with Hybrid/EV Powertrain Control Module | The vehicle approaching speaker controller does not receive data from the hybrid vehicle control ECU for approximately 10 seconds or more. |
|
PROCEDURE
| 1. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Vehicle Proximity Notification System / Trouble Codes.
(e) Check for DTCs.
Body Electrical > Vehicle Proximity Notification System > Trouble CodesHINT:
When DTCs indicating a CAN communication system malfunction are output, perform troubleshooting for the CAN communication system before the vehicle proximity notification system.
| NEXT | .gif) | GO TO CAN COMMUNICATION SYSTEM |
READ NEXT:
There is No Sound Made
DESCRIPTION Based on signals received from each ECU, the vehicle approaching speaker controller outputs warning sounds through the vehicle approaching speaker assembly. WIRING DIAGRAM CAUTION / NOTIC
SEE MORE:
Power Mirror Surface Position is not Memorized
DESCRIPTION If any of the M1, M2 or M3 seat memory switch is pressed, the outer mirror control ECU assembly (driver door) detects the switch operation and sends the seat memory switch signal to the main body ECU (multiplex network body ECU) via CAN communication. On receiving the seat memory switch
Luggage Compartment Door Opener does not Operate
DESCRIPTION The main body ECU (multiplex network body ECU) receives switch signals from the trunk and fuel switch assembly (luggage compartment door opening switch) the luggage door opening cancel switch, and operates the luggage compartment door lock assembly to open the luggage compartment door. W
