AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:U0100, U0122, U0140, U0155

DTC Code DTC Name
U0100 Lost Communication with ECM / PCM "A"
U0122 Lost Communication with Vehicle Dynamics Control Module
U0140 Lost Communication with Body Control Module
U0155 Lost Communication with Instrument Panel Cluster Control Module (Combination Meter)

DESCRIPTION

The TCM receives and transmits signals from each ECU using CAN communication.

Tech Tips


  • Problems on the CAN bus (communication line) can be detected from the DLC3 connector (Except when the DLC3 branch line is open).

  • By using the GTS, it is possible to check CAN communication DTC.

  • The DLC3 is connected to the CAN communication line, but the CAN communication is unable to detect problems on the DLC3 branch line.

DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
U0100

  1. CAN bus is normal.

  2. Signal from the ECM is interrupted.

  3. 500 ms, 800 ms, 2000 ms (differs depending on ID)

  4. 1-trip detection logic

 CAN communication system
U0122

  1. CAN bus is normal.

  2. Signal from the skid control ECU (brake actuator assembly) is interrupted.

  3. 800 ms

  4. 1-trip detection logic

 CAN communication system
U0140

  1. CAN bus is normal.

  2. Signal from the main body ECU (network gateway ECU) is interrupted.

  3. 800 ms, 20000 ms (differs depending on ID)

  4. 1-trip detection logic

 CAN communication system
U0155

  1. CAN bus is normal.

  2. Signal from combination meter assembly is interrupted.

  3. 2000 ms

  4. 1-trip detection logic

 CAN communication system

CAUTION / NOTICE / HINT

Note

Perform the universal trip to clear permanent DTCs Click here.

PROCEDURE


  1. CHECK OTHER DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and push the GTS main switch ON.

    3. Read the DTCs using the GTS Click here.

      Result
      Display (DTC output) Proceed to
      U0100, U0122, U0140 or U0155 A
      U0100, U0122, U0140 or U0155 and P160A B

    B

    GO TO P160A Click here

    A

  2. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and push the GTS main switch ON.

    3. Read the DTCs using the GTS Click here.


    NEXT

    GO TO CAN COMMUNICATION SYSTEM Click here