INSPECTION PROCEDURE 5: Combination meter does not Work.: Diagnosis

Required Special Tools: 

• MB991223: Harness Set

1. STEP 1. Measure at combination meter connector C-102 in order to check the battery circuit of power supply system to the combination meter. 
   1. Disconnect combination meter connector C-102, and measure at the wiring harness side.
      Fig 1: Disconnecting Combination Meter Connector C-102

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   2. Measure the voltage between terminal 31 and ground.
   • The measured value should be approximately 12 volts (battery positive voltage).

   Q: Does the measured voltage correspond with this range? 

   YES  : Go to  Step 4.

   NO:  Go to Step 2.

   Fig 2: Measuring The Voltage Between Terminal 31 And Ground

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2. STEP 2. Check combination meter connector C-102 for damage. 

   Q: Is combination meter connector C-102 in good condition? 

   YES  : Go to Step 3.

   NO:  Repair or replace the connector. Refer to , HARNESS CONNECTOR INSPECTION . Check to see that all meters operate.

   Fig 3: Checking Combination Meter Connector C-102

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3. STEP 3. Check the wiring harnesses between combination meter connector C-102 (terminal 31) and the battery. 
   Fig 4: Checking Combination Meter Connector C-102

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   NOTE: Also check intermediate connector C-209. If intermediate connectors C-209 are damaged, repair or replace the connector as described in , HARNESS CONNECTOR INSPECTION .

   Q: Are the wiring harnesses between combination meter connector C-102 (terminal 31) and the battery in good condition? 

   YES  : There is no action to be taken.

   NO:  Repair the wiring harness(es). Check to see that all meters operate.

   Fig 5: Checking Intermediate Connectors C-209

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4. STEP 4. Measure at combination meter connector C-101 in order to check the battery circuit of power supply system to the combination meter. 
   1. Disconnect combination meter connector C-101, and measure at the wiring harness side.
   2. Turn the ignition switch to "ON" position.
      Fig 6: Disconnecting Combination Meter Connector C-101

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

   Q: Does the measured voltage correspond with this range? 

   YES  : Go to  Step 7.

   NO:  Go to Step 5.

   Fig 7: Measuring The Voltage Between Terminal 12 And Ground

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5. STEP 5. Check combination meter connector C-101 for damage. 

   Q: Is combination meter connector C-101 in good condition? 

   YES  : Go to Step 6.

   NO:  Repair or replace the connector. Refer to , HARNESS CONNECTOR INSPECTION . Check to see that all meters operate.

   Fig 8: Checking Combination Meter Connector C-101

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6. STEP 6. Check the wiring harnesses between combination meter connector C-101 (terminal 12) and ignition switch (IG1). 
   Fig 9: Checking Combination Meter Connector C-101

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   NOTE: Also check junction connectors C-308 and C-311. If junction connectors C-308 or C-311 are damaged, repair or replace the connector as described in , HARNESS CONNECTOR INSPECTION .

   Q: Are the wiring harness between combination meter connector C-101 (terminal 12) and ignition switch (IG1) in good condition? 

   YES  : There is no action to be taken.

   NO:  Repair the wiring harness(es). Check to see that all meters operate.

   Fig 10: Checking Junction Connectors C-308 And C-311

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7. STEP 7. Measure at combination meter connector C-101 and C-102 in order to check the ground circuit to the combination meter. 
   1. Disconnect combination meter connector C-101 and C-102, and measure at the wiring harness side.
      Fig 11: Disconnecting Combination Meter Connector C-101 And C-102

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   2. Measure the resistance between combination meter connector C-101 terminal 22 and ground.
      • The measured value should be 2 ohms or less.
        Fig 12: Measuring The Resistance Between Combination Meter Connector C-101 Terminal 22 And Ground

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   3. Measure the resistance between combination meter connector C-102 terminal 48 and ground.
   • The measured value should be 2 ohms or less.

   Q: Does the measured voltage correspond with this range? 

   YES  : Repair the combination meter. Check to see that all meters operate.

   NO:  Go to Step 8.

   Fig 13: Measuring The Resistance Between Combination Meter Connector C-102 Terminal 48 And Ground

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8. STEP 8. Check combination meter connector C-101 and C-102 for damage. 

   Q: Are combination meter connector C-101 and C-102 in good condition? 

   YES  : Go to Step 9.

   NO:  Repair or replace the connector(s). Refer to , HARNESS CONNECTOR INSPECTION . Check to see that all meters operate.

   Fig 14: Checking Combination Meter Connector C-101 And C-102

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9. STEP 9. Check the wiring harness between combination meter connector C-101 (terminal 22), C-102 (terminal 48) and ground. 

Q: Is the wiring harness between combination meter connector C-101 (terminal 22), C-102 (terminal 48) and ground in good condition? 

YES  : There is no action to be taken.

NO:  Repair the wiring harness. Check to see that all

Fig 15: Checking Combination Meter Connector C-101 And C-102

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