Inspection Procedure 13: KOS timer lock function does not work: Diagnosis

Required Special Tools: 

• MB992006: Extra fine probe
• MB991223: Harness set
• 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

1. STEP 1. Check the operation of the keyless operation system (keyless entry system). 

   Operate the keyless operation key and check that all doors lock and unlock.

   Q: Is the check result normal? 

   1. YES:  Go to Step 2.
   2. NO:  Refer to INSPECTION PROCEDURE 12: "KEYLESS ENTRY SYSTEM DOES NOT WORK  ."
2. STEP 2. 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 TOOL (M.U.T.-III)  ."
   2. Turn the ignition switch to the "ON" position.
   3. Check whether the KOS-ECU related DTC is set.
   4. Turn the ignition switch to the "LOCK" (OFF) position.

   Q: Is the DTC set? 

   1. YES:  Diagnose the KOS-ECU. Refer to DIAGNOSTIC TROUBLE CODE CHART  .
   2. NO:  Go to Step 3.
      Fig 1: Connecting Scan Tool To Data Link Connector

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
3. STEP 3. Check of the troubles 

   Check that the KOS timer lock function operates.

   Q: Is the check result normal? 

   1. YES:  The diagnosis is complete.
   2. NO:  Perform troubleshooting for each door switch (Refer to TROUBLESHOOTING ).