U1109 – ETACS-ECU Time-out MMC Colt



TROUBLE JUDGMENT

  • While the cranking switch is in “OFF” position, or when 3 seconds pass after the cranking switch is in “OFF” from “ON”.
  • The battery voltage is 10 V or more.
  • The signals cannot be received from ETACS-ECU through CAN busline.

  • COMMENT ON TROUBLE SYMPTOM

  • The failure is possibly caused by malfunction of the harness and connector in CAN busline between engine-ECU and ETACS-ECU and ETACS-ECU, by malfunction in the power supply system of ETACS-ECU, in combination meter itself, in engine-ECU.

  • PROBABLE CAUSES

  • Failed of the harness and the connector
  • Failed ETACS-ECU
  • Failed engine-ECU

  • DIAGNOSIS PROCEDURE

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

  • Using M.U.T.-III, perform CAN busline diagnosis.
  • Q. Is the check result normal?

    STEP 2. M.U.T.-III other system diagnosis code

  • Confirm whether the diagnosis codes are output from ETACS-ECU.
  • Q. Is the diagnosis code output?

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

  • Confirm whether Diagnosis Code U1109: ETACS-ECU time out is output from the following ECU having CAN communication with combination meter.
  • Combination meter
  • Q. Is the diagnosis code output?

    STEP 4. Reconfirmation of diagnosis codes

  • Reconfirm whether the diagnosis codes are output from engine-ECU
  • Erase the diagnosis codes being output.
  • Ignition switch: “LOCK”(OFF) to ON
  • Confirm whether the diagnosis codes are output.
  • Q. Is the diagnosis code output?

    STEP 5. Reconfirmation of diagnosis codes

  • Reconfirm whether the diagnosis codes are output from engine-ECU
  • Erase the diagnosis codes being output.
  • Ignition switch: “LOCK” (OFF) to ON
  • Confirm whether the diagnosis codes are output.
  • Q. Is the diagnosis code output?

    STEP 6. Reconfirmation of diagnosis codes

  • Reconfirm whether the diagnosis codes are output from engine-ECU
  • Erase the diagnosis codes being output.
  • Ignition switch: “LOCK” (OFF) to ON
  • Confirm whether the diagnosis codes are output.
  • Q. Is the diagnosis code output?

    Author: admin