Inspection Procedure 4: Tone alarm does not sound 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, diagnose the CAN bus line. 
   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 THE SCAN TOOL (M.U.T.-III)  ".
   2. Turn the ignition switch to the "ON" position.
   3. Diagnose the CAN bus line.
   4. Turn the ignition switch to the "LOCK" (OFF) position.

   Q: Is the CAN bus line found to be normal? 

   YES:  Go to Step 2.

   NO:  Repair the CAN bus line (Refer to DIAGNOSIS ).

   Fig 1: Connecting Special Tools To Data Link Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. STEP 2. Using scan tool MB991958, read the combination meter diagnostic trouble code. 

   Check if DTC is set to the combination meter.

   Q: Is the DTC set? 

   YES:  Refer to DIAGNOSTIC TROUBLE CODE CHART  .

   NO:  Go to Step 3.

3. STEP 3. Using scan tool MB991958, read for any diagnostic trouble code. 

   Check if diagnosis code is set to the CVT, A/T, ABS, ASC, ETACS-ECU, WCM, KOS-ECU, AUDIO and A/C-ECU.

   Q: Is the DTC set to the any of the above? 

   YES < Set to the CVT. >  : Troubleshoot the CVT. Refer to DIAGNOSIS CODE CHART .

   YES < Set to the A/T. >  : Troubleshoot the A/T. Refer to DIAGNOSTIC TROUBLE CODE CHART .

   YES < Set to the ABS. >  : Troubleshoot the ABS. Refer to DIAGNOSTIC TROUBLE CODE CHART .

   YES < Set to the ASC. >  : Troubleshoot the ASC. Refer to DIAGNOSTIC TROUBLE CODE CHART .

   YES < Set to the ETACS. >  : Troubleshoot the ETACS. Refer to DIAGNOSTIC TROUBLE CODE CHART .

   YES < Set to the WCM. >  : Troubleshoot the WCM. Refer to DIAGNOSTIC TROUBLE CODE CHART .

   YES < Set to the KOS. >  : Troubleshoot the KOS. Refer to DIAGNOSTIC TROUBLE CODE CHART .

   YES < Set to the AUDIO. >  : Troubleshoot the AUDIO (Refer to DIAGNOSTIC TROUBLE CODE CHART ).

   YES < Set to the A/C. >  : Troubleshoot the A/C. Refer to MANUAL A/C DIAGNOSIS or AUTOMATIC A/C DIAGNOSIS .

   NO < The diagnosis code is not set. >  : Go to Step 4.

4. STEP 4. Using scan tool MB991958, check actuator test. 
   1. Turn the ignition switch to the "ON" position.
   2. Conduct the actuator test of the combination meter.
      • Item 12: Buzzer
        • The tone alarms sound normally.
   3. Turn the ignition switch to the "LOCK" (OFF) position.

   Q: Is the check result normal? 

   YES:  Go to Step 5.

   NO:  Replace the combination meter.

5. STEP 5. Retest the system 

   Check that the tone alarm normally.

   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 combination meter.