U1102,U1103 – ABS-ECU or TCL-ASC-ECU time-out MMC Colt


  • If diagnosis code No.U1102, U1103 is set in the ETACS, diagnose the CAN main bus line.
  • Whenever the ECU is replaced, ensure that the communication circuit is normal.

  • TROUBLE JUDGMENT


    COMMENT ON TROUBLE SYMPTOM

  • Connector(s) or wiring harness in the CAN bus lines between the ETACS-ECU and the ABS-ECU or the TCL/ASC-ECU, the power supply system to the ABS-ECU or the TCL/ASC-ECU, or the ETACS-ECU itself may be defective.

  • PROBABLE CAUSES

  • Malfunction of the ABS-ECU or the TCL/ASC-ECU
  • Malfunction of the ETACS-ECU
  • Malfunction of the CAN bus

  • DIAGNOSIS PROCEDURE

    STEP 1. M.U.T.-III CAN bus diagnostics

    Q. Is the check result normal?

    STEP 2. Check the diagnosis code of the ABS-ECU or the TCL/ASC-ECU.

    Q. Is the diagnosis code set?

    STEP 3. M.U.T.-III other system diagnosis code

  • Engine-ECU <M/T> or engine-A-M/T-ECU <Automated manual transmission>
    U1102: ABS or TCL/ASC-ECU time-out
  • Combination meter
    U1102: ABS or TCL/ASC-ECU time-out
  • Electric power steering-ECU
    U1102: ABS or TCL/ASC-ECU time-out
  • Q. Is the diagnosis code set?

    STEP 4. Check whether the diagnosis code is reset.

    Q. Is the diagnosis code set?

    STEP 5. Check whether the diagnosis code is reset.

    Q. Is the diagnosis code set?

    STEP 6. Check whether the diagnosis code is reset.

    Q. Is the diagnosis code set?

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