Inspection Procedure 5: The headlight automatic leveling warning light does not go off.: 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 (Vehicles with CAN communication system)

1. STEP 1. Using scan tool MB991958, read the diagnostic trouble code. 
   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 SCAN TOO (M.U.T.-III)  ".
   2. Turn the ignition switch to the "ON" position.
   3. Check whether the headlight automatic leveling-ECU related DTC is set.
   4. Turn the ignition switch to the "LOCK" (OFF) position.

   Q: Is DTC set? 

   YES:  Perform the troubleshooting of when the diagnostic trouble code is set (Refer to DIAGNOSTIC TROUBLE CODE CHART  ).

   NO:  Go to Step 2.

   Fig 1: Connecting Special Tools To Data Link Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. STEP 2. Using scan tool MB991958, check other system actuator test. 

   Perform the actuator test for the combination meter, and check that the headlight automatic leveling warning is displayed.

   1. Turn the ignition switch to the "ON" position.
   2. Set scan tool MB991958 to the actuator test mode.
      • Item 8: Indicator2
   3. Turn the ignition switch to the "LOCK" (OFF) position.

   Q: Is the check result normal? 

   YES:  Go to Step 3.

   NO:  Replace the combination meter.

3. STEP 3. Retest the system. 

   Check whether the headlight automatic leveling warning display goes out.

   Q: Is the check result normal? 

   YES:  The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS ).

   NO:  Replace the headlight automatic leveling-ECU.