INSPECTION PROCEDURE 2: Tachometer does not Work: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB991502: Scan Tool (MUT-II)

1. STEP 1. Check with other meter. 

   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  .
2. STEP 2. Using scan tool MB991502, read the diagnostic trouble code (DTC). 
   CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to "LOCK" (OFF) position before connecting or disconnecting scan tool.
   1. Connect scan tool MB991502 to the data link connector.
   2. Turn the ignition switch to "ON" position.
   3. Read the MFI system diagnostic trouble code.

   Q: Is DTC output to the MFI system? 

   1. YES:  Refer to DIAGNOSTIC TROUBLE CODE DEFINITIONS .
   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-04 and PCM connector C-111 for damage. 

   Q: Are combination meter connector C-04 and vehicle speed sensor connector C-111 in good condition? 

   1. YES:  Go to Step 4.
   2. NO:  Repair or replace the connector. The tachometer should work normally.
   Fig 2: Locating Combination Meter Connector C-04

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 3: Locating Vehicle Speed Sensor Connector C-111

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
4. STEP 4. Check the wiring harness between combination meter connector C-04 (terminal 47) and PCM connector C-111 (terminal 43). 
   NOTE: Also check intermediate connector C-105. If intermediate connector C-105 is damaged, repair or replace the connector.
   Fig 4: Locating Combination Meter Connector C-04

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 5: Locating Vehicle Speed Sensor Connector C-111

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Are the wiring harness between combination meter connector C-04 (terminal 47) and PCM connector C-111 (terminal 43) in good condition? 

   1. YES:  Go to Step 5.
   2. NO:  Repair the wiring harness. The tachometer should work normally.
   Fig 6: Locating Combination Meter Connector C-105

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

   Q: Does the tachometer operate? 

   1. YES:  There is no action to be taken.
   2. NO:  Replace the PCM. The tachometer should work normally.