CRUISE CONTROL SYSTEM, Diagnostic DTC:U0122

DTC Code DTC Name
U0122 Lost Communication with Vehicle Dynamics Control Module

DESCRIPTION

The vehicle speed sensors send vehicle speed signals to the brake booster with master cylinder (skid control ECU). Signals are then sent to the hybrid vehicle control ECU.

DTC No. DTC Detection Condition Trouble Area
U0122 While ignition switch is on (IG), communication stop between brake booster with master cylinder assembly (skid control ECU) and hybrid vehicle control ECU continues for 2.6 seconds or more

  • Brake booster with master cylinder assembly (skid control ECU)

  • CAN communication system

  • Hybrid vehicle control ECU

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Connect the GTS to the DLC3.

    2. Select "Bus Check" from the "System Select".

    3. Select "DTC" from the "Bus Check" screen, and then select "Enter".

      Result
      Result Proceed to
      CAN communication system DTC is not output A
      CAN communication system DTC is output (w/ Toyota Safety Sense) B
      CAN communication system DTC is output (w/o Toyota Safety Sense) C

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here