Inspection Procedure 1: The hazard warning lights do not illuminate: 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. Check that the turn-signal light operate. 

   Check that the turn-signal lights illuminate normally.

   Q: Does turn-signal light work normally? 

   • YES:  Go to Step 2.
   • NO:  Diagnose the headlights. Refer to INSPECTION PROCEDURE 11: NONE OF TURN-SIGNAL LIGHTS ILLUMINATES .
2. STEP 2. Using scan tool MB991958, check data list. 

   Using the ETACS-ECU service data, check the hazard warning light signal.

   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 TOOL (M.U.T.-III)  ."
   2. Turn the ignition switch to the "ACC" position.
   3. Turn "ON" the hazard light switch.

      Item No.	Item name	Normal conditions
      Item 265	Hazard switch	ON

   Q: Does scan tool MB991958 display the items "Hazard switch" as normal condition? 

   • YES:  (Normal condition is displayed for item) Go to Step 3.
   • NO:  (Normal condition is not displayed for item No. 265.) Troubleshoot the ETACS-ECU. Refer to INSPECTION PROCEDURE 10: ETACS-ECU DOES NOT RECEIVE ANY SIGNAL FROM THE HAZARD WARNING LIGHT SWITCH .
     Fig 1: Connecting Scan Tool To Data Link Connector

     Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
3. STEP 3. Retest the system 

   Check that the hazard warning light illuminate normally.

   Q: Does the taillight work normally? 

   • YES:  The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
   • NO:  Replace the ETACS-ECU.