Lost Communication with Brake System Control Module - CVT System

K41B CVT: CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: U0129: Lost Communication with Brake System Control Module
U0129 - Lost Communication with Brake System Control Module

DESCRIPTION

The ECM receives signals sent from the skid control ECU via the CAN communication system. When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.





INSPECTION PROCEDURE

NOTICE:
Perform the universal trip to clear permanent DTCs Reading and Clearing Diagnostic Trouble Codes.

PROCEDURE

1. CLEAR DTC AND PERFORM ROAD TEST

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

HINT
Write down the currently output DTCs before clearing them.

(b) Start the engine, drive at a low speed and perform the inspection.

NEXT -- Continue to next step.

2. CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / DTC / Current or Pending.

(e) Read the DTCs using the Techstream.

Result





B -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting

A -- CHECK FOR INTERMITTENT PROBLEMS Electronic Circuit Inspection Procedure