Lexus NX manuals

Lexus NX: Lost Communication with Brake System Control Module (U0129,U0142,U0293)

Lexus NX Service Manual / Audio & Visual & Telematics / Audio / Video / Asc System / Lost Communication with Brake System Control Module (U0129,U0142,U0293)

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0129

Lost Communication with Brake System Control Module

No communication with brake booster with master cylinder assembly (skid control ECU)
  • CAN communication system
  • Brake booster with master cylinder assembly (skid control ECU)
  • Stereo component equalizer assembly

U0142

Lost Communication with Body Control Module "B"

No communication with main body ECU (multiplex network body ECU)
  • CAN communication system
  • Main body ECU (multiplex network body ECU)
  • Stereo component equalizer assembly

U0293

Lost Communication With Hybrid Powertrain Control Module

No communication with hybrid vehicle control ECU
  • CAN communication system
  • Hybrid vehicle control ECU
  • Stereo component equalizer assembly

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs.

Click here

Body Electrical > ASC > Clear DTCs

(b) Recheck for DTCs and check that no DTCs are output.

Click here

Body Electrical > ASC > Trouble Codes

OK:

U0129, U0142 and U0293 are not output.

OK

USE SIMULATION METHOD TO CHECK

NG

GO TO CAN COMMUNICATION SYSTEM

READ NEXT:

 Main Switch Circuit

DESCRIPTION The stereo component equalizer assembly detects vehicle sound switch signals. The ASC system can be turned on and off by operating the vehicle sound switch. WIRING DIAGRAM CAUTION / NOTIC

 Power Source Circuit

DESCRIPTION This circuit is the power source circuit for the stereo component equalizer assembly. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system

 Audio And Visual System

SEE MORE:

 Fuel information

You must only use unleaded gasoline in your vehicle. Select octane rating 87 (Research Octane Number 91) or higher. Use of unleaded gasoline with an octane rating lower than 87 may result in engine knocking. Persistent knocking can lead to engine damage. At minimum, the gasoline you use s

 Rr Sensor Initialization Incomplete (C1AF4)

DESCRIPTION When it is judged that the rear sensors have not been initialized, the clearance warning ECU assembly stores DTC C1AF4. DTC No. Detection Item DTC Detection Condition Trouble Area C1AF4 Rr Sensor Initialization Incomplete Rear sensor not initialized Initialize rear

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