INSPECTION PROCEDURE 5: Combination meter does not work: Diagnosis

Required Special Tools: 

1. MB991223: Harness Set

1. STEP 1. Measure at combination meter connector C-04 by backprobing in order to check the battery circuit of power supply system to the combination meter. 
   1. Measure at combination meter connector C-04 without disconnecting the connector.
      Fig 1: Locating Combination Meter Connector C-04

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   2. Measure the voltage between terminal 35 and ground.
      • The measured value should be approximately 12 volts (battery positive voltage).

   Q: Does the measured voltage correspond with this range? 

   1. YES:  Go to Step  4) .
   2. NO:  Go to Step 2.
   Fig 2: Measuring Voltage Between Terminal 35 & Ground

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2. STEP 2. Check combination meter connector C-04 for damage. 

   Q: Is combination meter connector C-04 in good condition? 

   1. YES:  Go to Step 3.
   2. NO:  Repair or replace the connector. Check to see that all meters operate.
   Fig 3: Locating Combination Meter Connector C-04

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3. STEP 3. Check the wiring harness between combination meter connector C-04 (terminal 35) and fusible link (1). 
   NOTE: Also check intermediate connector C-116, junction connectors C-202 and C-204 and joint connector C-02. If intermediate connectors C-116, junction connectors C-202 or C-204 or joint connector C-02 are damaged, repair or replace the connector .
   Fig 4: Identifying Fusible Link

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   Fig 5: Locating Combination Meter Connector C-04

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   Q: Are the wiring harness between combination meter connector C-04 (terminal 35) and fusible link (1) in good condition? 

   1. YES:  There is no action to be taken.
   2. NO:  Repair the wiring harness. Check to see that all meters operate.
   Fig 6: Locating Connector C-02 & Connector C-116

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   Fig 7: Locating Connectors C-202 & C-204

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4. STEP 4. Measure at combination meter connector C-04 by backprobing in order to check the battery circuit of power supply system to the combination meter. 
   1. Measure at combination meter connector C-04 without disconnecting the connector.
   2. Turn the ignition switch to "ON" position.
      Fig 8: Locating Combination Meter Connector C-04

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   3. Measure the voltage between terminal 42 and ground.
      • The measured value should be approximately 12 volts (battery positive voltage).

   Q: Does the measured voltage correspond with this range? 

   1. YES:  Go to Step  7) .
   2. NO:  Go to Step 5.
   Fig 9: Measuring Voltage Between Terminal 42 And Ground

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5. STEP 5. Check combination meter connector C-04 for damage. 

   Q: Is combination meter connector C-04 in good condition? 

   1. YES:  Go to Step 6.
   2. NO:  Repair or replace the connector. . Check to see that all meters operate.
   Fig 10: Locating Combination Meter Connector C-04

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6. STEP 6. Check the wiring harness between combination meter connector C-04 (terminal 42) and ignition switch (IG1). 
   NOTE: Also check junction connectors C-203 and C-205. If junction connectors C-203 or C-205 are damaged, repair or replace the connector as described in GROUP 00E, Harness Connector Inspection .
   Fig 11: Locating Combination Meter Connector C-04

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   Q: Are the wiring harness between combination meter connector C-04 (terminal 42) and ignition switch (IG1) in good condition? 

   1. YES:  There is no action to be taken.
   2. NO:  Repair the wiring harness. Check to see that all meters operate.
   Fig 12: Locating Connectors C-203 & C-205

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7. STEP 7. Measure at combination meter connector C-04 by backprobing in order to check the ground circuit to the combination meter. 
   1. Measure at combination meter connector C-04 without disconnecting the connector.
      Fig 13: Locating Combination Meter Connector C-04

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   2. Measure the resistance between terminal 40 and ground.
      • The measured value should be 2 ohms or less.
   3. Measure the resistance between terminal 41 and ground.
      • The measured value should be 2 ohms or less.

   Q: Does the measured voltage correspond with this range? 

   1. YES:  Repair the combination meter. Check to see that all meters operate.
   2. NO:  Go to Step 8.
   Fig 14: Measuring Resistance Between Terminal 41 & Ground

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8. STEP 8. Check combination meter connector C-04 for damage. 

   Q: Is combination meter connector C-04 in good condition? 

   1. YES:  Go to Step 9.
   2. NO:  Repair or replace the connector. . Check to see that all meters operate.
   Fig 15: Locating Combination Meter Connector C-04

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9. STEP 9. Check the wiring harness between combination meter connector C-04 (terminal 40 and 41) and ground. 

   Q: Are the wiring harness between combination meter connector C-04 (terminal 40 and 41) and ground in good condition? 

   1. YES:  There is no action to be taken.
   2. NO:  Repair the wiring harness. Check to see that all meters operate.
   Fig 16: Locating Combination Meter Connector C-04

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.