Diagnostic Trouble Code Procedures: Diagnosis

Required Special Tools: 

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

1. STEP 1. Using scan tool MB991958, read the combination meter diagnostic trouble code. 

   Check if DTC is set to the combination meter.

   CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
   1. Connect scan tool MB991958. Refer to "HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)  ".
   2. Turn the ignition switch to the "ON" position.
   3. Erase the DTC.
   4. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
   5. Check if diagnostic trouble code is set.

   Q: Is the DTC set? 

   YES:  Replace the combination meter, and then go to Step 2.

   NO:  The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS ).

   Fig 1: Connecting Special Tools To Data Link Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. STEP 2. Recheck for diagnostic trouble code. 

   Check if DTC is set to the combination meter.

   1. Erase the DTC.
   2. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
   3. Check if diagnostic trouble code is set.

   Q: Is the DTC set? 

   YES:  Go to  Step 1.

   NO:  The procedure is complete.