INSPECTION PROCEDURE E-1: Keyless Entry System: Keyless entry system does not operate.: Diagnosis

Required Special Tools: 

• MB991223: Harness Set.
• MB991502: Scan Tool (MUT-II):
  • MB991496: Main unit.
  • MB991497: Test Harness (for communication).
• MB991958: Scan Tool (MUT-III Sub Assembly):
  • MB991824: V.C.I.
  • MB991827: USB Cable.
  • MB991911: Main Harness B.

1. STEP 1. Verify the central door locking system. 

   Q: Does the central door locking system work normally? 

   1. YES :  Go to Step 2.
   2. NO :  Refer to INSPECTION PROCEDURE C-1 "CENTRAL DOOR LOCKING SYSTEM DOES NOT WORK AT ALL"  .
2. STEP 2. Check the input signal (by using the pulse check mode of the monitor). 

   Check input signals from the transmitter.

   CAUTION: To prevent damage to scan tool MB991502 or MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502 or MB991958. 
   1. Connect scan tool MB991502 or MB991958 to the data link connector. Refer to "HOW TO CONNECT SWS MONITOR"  .
   2. Operate scan tool MB991502 or MB991958 as follows:
      1. Select "Interactive Diagnosis."
      2. Select "System select."
      3. Select "SWS."
      4. Select "Pulse Checking."
   3. Push the transmitter "LOCK" or "UNLOCK" button.
   4. Check that scan tool MB991502 or MB991958 sounds.
      Fig 1: Connecting Scan Tool MB991502 To Data Link Connector

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: When the transmitter "LOCK" or "UNLOCK" button is turned ON, does scan tool MB991502 or MB991958 sound? 

   1. YES :  Replace the ETACS-ECU. All the doors can be locked or unlocked by means of the transmitter.
   2. NO :  Refer to INSPECTION PROCEDURE O-9 "ETACS-ECU DOES NOT RECEIVE A SIGNAL FROM THE LOCK OR UNLOCK BUTTON"  .
   Fig 2: Connecting Scan Tool MB991911 To Data Link Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.