Inspection Procedure 12: The Comfort Flashing Function Does Not Work Normally: 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, Check the configuration function. 
   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 "ON" position.
   3. Use the ETACS-ECU configuration function to check that the "Comfort flasher" is set to "Enable".
   4. Turn the ignition switch to the "LOCK" (OFF) position.

   Q: Is the "Comfort flasher" set to "Enable"? 

   1. YES:  Go to Step 2.
   2. NO:  Use the ETACS-ECU customize function to set the "Comfort flasher" to "Enable" (Refer to HEADLIGHT AUTOMATIC-SHUTDOWN FUNCTION CHECK  ).
   Fig 1: Connecting Scan Tool To Data Link Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. STEP 2. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code. 
   1. Turn the ignition switch to the "ON" position.
   2. Check whether the ETACS-ECU DTC is set.
   3. Turn the ignition switch to the "LOCK" (OFF) position.

   Q: Is the DTC set? 

   1. YES:  Diagnose the ETACS-ECU (Refer to DIAGNOSIS ).
   2. NO:  Go to Step 3.
3. STEP 3. Check that the turn-signal light operates. 

   Check that the turn-signal light work normally when the ignition switch is in the "ON" position.

   Q: Do turn-signal lights work normally? 

   1. YES:  Go to Step 4.
   2. NO:  Refer to INSPECTION PROCEDURE 11 "NONE OF TURN-SIGNAL LIGHTS ILLUMINATES"  .
4. STEP 4. Retest the system 

   Check that the comfort flashing function works normally.

   Q: Does comfort flashing function works normally? 

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