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DTC    U0122    Lost Communication with Vehicle Dynamics Control Module

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DESCRIPTION

The vehicle speed sensor sends the vehicle speed signal to the brake booster with master cylinder (skid control ECU), and then it is sent to the power management control ECU.

DTC Code
DTC Detection Condition
Trouble Area
U0122
While power switch is on (IG), communication stop between brake booster with master cylinder (skid control ECU) and power management control ECU continues for 2.6 seconds or more
  1. Brake booster with master cylinder (skid control ECU)
  2. CAN communication system
  3. Power management control ECU

INSPECTION PROCEDURE

Refer to CAN Communication System DTC U0122 (Click here).
1.CHECK CAN COMMUNICATION SYSTEM

  1. Select "Bus Check" from the "System Select" (Click here).

  1. Select "Communication Malfunction DTC" from the "Bus Check" screen, and then select "Enter" (Click here).

    Result:
    Result
    		Proceed to
    CAN communication system DTC is not output
    		A
    CAN communication system DTC is output
    		B



B
GO TO CAN COMMUNICATION SYSTEM (Click here)
A

USE SIMULATION METHOD TO CHECK (Click here)