INSPECTION PROCEDURE 1: Speedometer does not Work. < A/T >: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB991958: Scan Tool (MUT-III Sub Assembly)
  • MB991824: Vehicles Communication Interface (V.C.I.)
  • MB991827: MUT-III USB Cable
  • MB991911: MUT-III Main Harness B (Vehicles without CAN communication system)

1. STEP 1. Check with other meter. 

   Check to see that the tachometer, fuel gauge and water thermometer are operating normally.

   Q: Do all other meters operate? 

   1. YES < other meters all operate. >:  Go to Step 2.
   2. NO < one of the meters do not operate. >:  Refer to INSPECTION PROCEDURE 6: COMBINATION METER 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 "LOCK" (OFF) position before connecting or disconnecting scan tool.
   1. Connect scan tool MB991958 to the data link connector.
   2. Turn the ignition switch to the "ON" position.
   3. Read the MFI system diagnostic trouble code.

   Q: Is DTC P0720 output? 

   1. YES:  Refer to DIAGNOSTIC TROUBLE CODE CHARTS or 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 combination meter connector C-01 and PCM connector C-116 for damage. 

   Q: Are combination meter connector C-01 and PCM connector C-116 in good condition? 

   1. YES:  Go to Step 4.
   2. NO:  Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . The speedometer should work normally.
      Fig 2: Identifying Connector C-01

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
      Fig 3: Identifying Connector C-116

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
4. STEP 4. Check the wiring harness between combination meter connector C-01 (terminal 12) and PCM connector C-116 (terminal 80). 
   Fig 4: Identifying Connector C-01

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 5: Identifying Connector C-116

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   NOTE: Also check joint connector (5) C-21 and intermediate connector C- 124. If joint connector (5) C-21 or intermediate connectors C-124 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .

   Q: Are the wiring harness between combination meter connector C-01 (terminal 12) and PCM connector C-116 (terminal 80) in good condition? 

   1. YES:  Go to Step 5.
   2. NO:  Repair the wiring harness. The speedometer should work normally.
      Fig 6: Identifying Joint Connector C-21

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
      Fig 7: Identifying Intermediate Connector C- 124

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
5. STEP 5. Check in auto-cruise control. 

   Q: Does auto-cruise control take effect? 

   1. YES:  Replace the combination meter. The speedometer should work normally.
   2. NO:  Replace the PCM. The speedometer should work normally.