DIAGNOSTIC ITEM 2: Malfunction of the ETACS-ECU: Diagnosis

Required Special Tools: 

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: Vehicle Communication Interface (V.C.I.)
  • MB991827: M.U.T.-III USB Cable
  • MB991910: M.U.T.-III Main Harness A

Recheck for other system diagnostic trouble code. 

Check whether ETACS-ECU-related DTC is set.

1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Check if the DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.

   Q: Is the DTC set? 

   The DTC other than the U code is set.:  Troubleshoot the ETACS-ECU. Refer to ETACS-ECU .

   Only U-code DTC is set.:  Check the power supply circuit of the ETACS-ECU. Refer to ETACS-ECU .

   The DTC is not set.:  Check the power supply circuit of the ETACS-ECU. Refer to ETACS-ECU .

   Fig 1: Connecting Scan Tool To Data Link Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.