Inspection Procedure 1: Speedometer Does Not Work.: Diagnosis

Required Special Tool: 

• 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 (Vehicle 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 5: COMBINATION METER DOES NOT WORK. .
2. STEP 2. Using scan tool MB991958, read the MFI diagnostic trouble code (DTC). 
   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 to the data link connector.
   2. Turn the ignition switch to "ON" position.
   3. Read the NFI system diagnostic trouble mode.

   Q: Is DTC P0720 output? 

   1. YES:  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 combination meter connector C-02 and PCM connector C-112 for damage. 

   Q: Are combination meter connector C-02 and PCM connector C-112 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-02

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 3: Identifying Connector C-112

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
4. STEP 4. Check the wiring harness between combination meter connector C-02 (terminal 12) and PCM connector C-112 (terminal 79) 
   Fig 4: Identifying Connector C-02

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 5: Identifying Connector C-112 (Terminal 79)

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   NOTE: Also check joint connector (5) C-03 and intermediate connector C-118. If joint connector (5) C-03 or intermediate connectors C-118 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .

   Q: Are the wiring harness between combination meter connector C-02 and PCM connector C-112 (terminal 79) in good condition? 

   1. YES:  Replace the combination meter. The speedometer should work normally.
   2. NO:  Repair the wiring harness. The speedometer should work normally.
   Fig 6: Identifying Intermediate Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.