Inspection Procedure 1: Power supply circuit check: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB992006: Extra Fine Probe

1. STEP 1. Using scan tool MB991958, read the combination meter diagnostic trouble code. 

   Check if DTC is set in the combination meter.

   CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
   1. Connect scan tool MB991958. Refer to DIAGNOSIS  ."
   2. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
   3. Check if DTC is set.
   4. Turn the ignition switch to the "LOCK" (OFF) position.

   Q: Is the DTC set? 

   YES  : Troubleshoot the combination meter (Refer to DIAGNOSTIC TROUBLE CODE CHART  ).

   NO  : Go to Step 2.

2. STEP 2. Check combination meter connector C-203 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Is combination meter connector C-203 in good condition? 

   YES  : Go to Step 3.

   NO  : Repair the defective connector.

3. STEP 3. Check the battery power supply circuit to the combination meter. Measure the voltage at combination meter connector C-203. 
   1. Disconnect the connector, and measure at the wiring harness side.
   2. Turn the ignition switch to the LOCK (OFF) position.
   3. Measure the voltage between terminal 1 and ground.
   • The voltage should measure approximately 12 volts (battery positive voltage).

   Q: Is the measured voltage approximately 12 volts (battery positive voltage)? 

   YES  : Go to Step  5.

   NO  : Go to Step 4.

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

4. STEP 4. Check the wiring harness between combination meter connector C-203 (terminal 1) and the fusible link (36). 
   • Check the power supply line (battery supply) for open circuit and short circuit.
   NOTE: Also check ETACS-ECU connectors C-406 and C-417 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If ETACS-ECU connector C-406 and C-417 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, HARNESS CONNECTOR INSPECTION .

   Q: Is the wiring harness between combination meter connector C-203 (terminal 1) and the fusible link (36) in good condition? 

   YES  : The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).

   NO  : Repair the wiring harness.

5. STEP 5. Check the battery power supply circuit to the combination meter. Measure the voltage at combination meter connector C-203. 
   1. Disconnect the connector, and measure at the wiring harness side.
   2. Turn the ignition switch to the ON position.
   3. Measure the voltage between terminal 2 and ground.
      • The voltage should measure approximately 12 volts (battery positive voltage).

   Q: Is the measured voltage approximately 12 volts (battery positive voltage)? 

   YES  : Go to Step  8.

   NO  : Go to Step 6.

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

6. STEP 6. Using scan tool MB991958, check data list. 

   Check the input signal from the ignition switch (IG1) in the ETACS-ECU.

   1. Check the ETACS data list.
      • Turn the ignition switch to the "ON" position.

      Item No.	Item name	Normal condition
      Item 254	IG voltage	Approximately 12 volts (battery positive voltage)

   2. Turn the ignition switch to the "LOCK" (OFF) position.

   Q: Do the scan tool MB991958 display the item "IG voltage" is normal condition? 

   YES  : Go to Step 7.

   NO  : Troubleshoot the ETACS-ECU. Refer to INSPECTION PROCEDURE 2: ETACS-ECU DOES NOT RECEIVE ANY SIGNAL FROM THE IGNITION SWITCH (IG1) ."

7. STEP 7. Check the wiring harness between combination meter connector C-203 (terminal 2) and the fusible link (34). 
   • Check the power supply line (battery supply) for open circuit and short circuit.
   NOTE: Also check ETACS-ECU connectors C-408 and C-417 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If ETACS-ECU connector C-408 or C-417 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, HARNESS CONNECTOR INSPECTION .

   Q: Is the wiring harness between combination meter connector C-203 (terminal 2) and the fusible link (34) in good condition? 

   YES  : The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).

   NO  : Repair the wiring harness.

8. STEP 8. Check the ground circuit to the combination meter. Test at combination meter connector C-203. 
   1. Disconnect the connector, and measure at the wiring harness side.
   2. Measure the resistance value between terminal 13 and ground.
      • The resistance should be 2 ohms or less.

   Q: Is the measured resistance 2 ohms or less? 

   YES  : Go to Step  10.

   NO  : Go to Step 9.

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

9. STEP 9. Check the wiring harness between combination meter connector C-203 (terminal 13) and ground. 
   • Check the ground wire for open circuit.
   NOTE: Also check grounding connector C-01 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If grounding connector C-01 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, HARNESS CONNECTOR INSPECTION .

   Q: Is the wiring harness between combination meter connector C-203 (terminal 13) and ground in good condition? 

   YES  : The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).

   NO  : Repair the wiring harness.

10. STEP 10. Retest the system. 

    Check that the combination meter works normally.

    Q: Is the check result satisfactory? 

    YES  : The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).

    NO  : Replace the combination meter.