INSPECTION PROCEDURE 2: Tachometer does not Work.: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB991958: Scan Tool (MUT-III Sub Assembly)
  • MB991824: Vehicle Communication Interface (V.C.I.)
  • MB991827: MUT-III USB Cable
  • MB991911: MUT-III Main Harness B

1. STEP 1. Check the tachometer by observing the other meters. 

   Check to see that the speedometer, fuel gauge and water thermometer operate 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, check the MFI system 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 "ON" position.
   3. Check the MFI system diagnostic trouble code.

   Q: Are MFI system-related DTC(s) set to the MFI system? 

   1. YES:  Refer to MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS .
   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 D-03 and PCM connector D-134 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Are combination meter connector D-03 and PCM connector D-134 in good condition? 

   1. YES:  Go to Step 4.
   2. NO:  Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . The tachometer should work normally.
   Fig 2: Locating Combination Meter Connector D-03

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 3: Locating PCM Connector D-134

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
4. STEP 4. Check the wiring harness between combination meter connector D-03 (terminal 66) and PCM connector D-134 (terminal 87). 
   Fig 4: Locating Combination Meter Connector D-03

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 5: Locating PCM Connector D-134

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   NOTE: Also check intermediate connector E-111. If intermediate connector E-111 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .

   Q: Is the wiring harness between combination meter connector D-03 (terminal 66) and PCM connector D-134 (terminal 87) in good condition? 

   1. YES:  Go to Step 5.
   2. NO:  Repair the wiring harness. The tachometer should work normally.
   Fig 6: Locating Intermediate Connector E-111

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
5. STEP 5. Replace and check the combination meter. 

   Q: Does the tachometer operate? 

   1. YES:  The procedure is complete.
   2. NO:  Replace the PCM. The tachometer should work normally.