Posted in Mitsubishi Colt

U1102 – ABS-ECU Vehicle without ASC or ABS-ASC-ECU Vehicle with ASC Time-out MMC Colt

 Posted by  Posted on September 27, 2020

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 ABS-ECU <Vehicle without ASC> or ABS/ASC-ECU <vehicle with ASC> 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 ABS-ECU <Vehicle without ASC> or ABS/ASC-ECU <vehicle with ASC> or between engine-ECU and ABS-ECU <Vehicle without ASC> and ABS-ECU <Vehicle without ASC> or ABS/ASC-ECU <vehicle with ASC>, by malfunction in the power supply system of ABS-ECU <Vehicle without ASC> or ABS/ASC-ECU <vehicle with ASC>, in ABS-ECU <Vehicle without ASC> or ABS/ASC-ECU <vehicle with ASC> itself, in engine-ECU.

    • PROBABLE CAUSES

  • Failed of the harness and the connector
  • Failed engine-ECU
  • Failed ABS-ECU <Vehicle without ASC>
  • Failed ABS/ASC-ECU <vehicle with ASC>

    • 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 ABS-ECU <Vehicle without ASC> or ABS/ASC-ECU <vehicle with ASC>.

    • Q. Is the diagnosis code output?

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

  • Confirm whether diagnosis code U1102: ABS-ECU <Vehicle without ASC> or ABS/ASC-ECU <vehicle with ASC> time-out is output from the following ECU having CAN communication with ABS-ECU.
  • 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. 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. 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