INSPECTION PROCEDURE 5: Engine Coolant Temperature Gauge does not Work.: Diagnosis

Required Special Tool: 

MB991223: Harness Set

1. STEP 1. Check with other meter. 

   Check to see that the speedometer, tachometer and fuel gauge operate normally.

   Q: Do all other meters operate? 

   YES < other meters all operate. >  : Go to  Step 2.

   NO < one of the meters do not operate. >  : Refer to INSPECTION PROCEDURE 6  .

2. STEP 2. Check the engine coolant temperature gauge unit. 

   Check to see that the engine coolant temperature gauge unit operate normally. Refer to FUEL LEVEL SENSOR FLOAT HEIGHT .

   Q: Is the engine coolant temperature gauge unit normal? 

   YES  : Go to  Step 3.

   NO  : Replace the engine coolant temperature gauge unit. The engine coolant temperature gauge should work normally.

3. STEP 3. Check engine coolant temperature gauge unit connector B-112 and combination meter connector C-02 for damage. 

   Q: Are engine coolant temperature gauge unit connector B-112 and combination meter connector C-02 in good condition? 

   YES  : Go to  Step 4.

   NO  : Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . The engine coolant temperature gauge should work normally.

   Fig 1: Identifying Terminals Of B-112 (2.0L) Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 2: Identifying Terminals Of B-112 (2.4L) Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 3: Identifying Terminals Of Combination Meter C-02 Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
4. STEP 4. Check the wiring harness between engine coolant temperature gauge unit connector B-112 (terminal 1) and combination meter connector C-02 (terminal 50). 
   Fig 4: Identifying Terminals Of B-112 (2.0L) Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 5: Identifying Terminals Of B-112 (2.4L) Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 6: Identifying Terminals Of Combination Meter C-02 Connector

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

   Q: Are the wiring harness between engine coolant temperature gauge unit connector B-112 (terminal 1) and combination meter connector C-02 (terminal 50) in good condition? 

   YES  : Repair or replace the combination meter. The engine coolant temperature gauge should work normally.

   NO  : Repair the wiring harness. The engine coolant temperature gauge should work normally.

   Fig 7: Identifying Terminals Of Intermediate C-124 Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.