Lexus NX manuals

Lexus NX: Lost Communication with Brake System Control Module (U0129,U0140,U0293)

Lexus NX Service Manual / Vehicle Exterior / Acoustic Vehicle Alerting System / Acoustic Vehicle Alerting System / 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.
  • CAN communication system
  • Skid control ECU (brake booster with master cylinder assembly)

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.
  • CAN communication system
  • Main body ECU (multiplex network body ECU)

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.
  • CAN communication system
  • Hybrid vehicle control ECU

PROCEDURE

1.

CHECK FOR DTC

(a) Connect the GTS to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the GTS 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 Codes

HINT:

When DTCs indicating a CAN communication system malfunction are output, perform troubleshooting for the CAN communication system before the vehicle proximity notification system.

NEXT

GO TO CAN COMMUNICATION SYSTEM

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