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 |
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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:
Precaution
PRECAUTION PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL NOTICE: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected. System Name See Procedure Lane Control System (for Gasoline Model)
Headlight Dimmer Switch Circuit
DESCRIPTION The steering sensor receives the following switch information:
Light control switch in DRL OFF*1, off*2, tail, head or AUTO position
Dimmer switch in high, low or high flash (pass) position
*1: w/ DRL OFF Switch
*2: w/o DRL OFF Switch
WIRING DIAGRAM CAUTION / NOTICE / HI
