Inspection Procedure 1: Power is not turned ON when the power switch is turned ON.: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB992006: Extra Fine Probe
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: Vehicle Communication Interface (V.C.I.).
  • MB991827: M.U.T.-III USB Cable
  • MB991910: M.U.T.-III Main Harness A

1. STEP 1. ETACS-ECU coding data check. 
   1. Operate scan tool MB991958 to read the ETACS-ECU option coding information (Refer to CODING LIST ).
   2. Check that the "AUDIO" is set to "Present".

   Q: Is the check result normal? 

   YES:  Go to Step 2.

   NO:  Operate scan tool MB991958 to set the option coding "AUDIO" to "Present," and check the trouble symptom.

   Fig 1: Connecting Special Tools To Data Link Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. STEP 2. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code. 

   Check if the diagnostic trouble code is set to the ETACS-ECU.

   Q: Is the DTC set? 

   YES:  Troubleshoot the ETACS-ECU. Refer to DIAGNOSIS .

   NO:  Go to Step 3.

3. STEP 3. Using scan tool MB991958, check data list. 

   Check the input signal of ACC relay.

   • Turn the ignition switch to the ACC position.
     ACC SWITCH CONDITION CHART
     
     

     Item No.	Item name	Normal conditions
     Item 288	ACC switch	ON

     OK: Normal condition is displayed. 

   Q: Is the check result normal? 

   YES:  Go to Step 4.

   NO:  Refer to Troubleshooting - INSPECTION PROCEDURE 1 "THE IGNITION SWITCH (ACC) SIGNAL IS NOT RECEIVED" .

4. STEP 4. Check radio and CD player or CD changer connector C-16 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Is radio and CD player or CD changer connector C-16 in good condition? 

   YES:  Go to Step 5.

   NO:  Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . The steering remote control switch should work normally.

5. STEP 5. Check the power supply circuit to the radio and CD player or CD changer. Measure the voltage at radio and CD player or CD changer connector C-16. 
   1. Disconnect the connector, and measure at the wiring harness-side connector.
   2. Measure the voltage between terminal 30 and ground.

      OK: The voltage should measure approximately 12 volts (battery positive voltage). 

   Q: Is the measured voltage battery voltage? 

   YES:  Go to  Step 7.

   NO:  Go to Step 6.

   Fig 2: Measuring Voltage Between Terminal 30 And Ground

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
6. STEP 6. Check the wiring harness between fusible link 36 and radio and CD player or CD changer connector C-16 (terminal 30). 
   • Check the power supply lines (battery power supply) for open circuit and short circuit.

   Q: Is the wiring harness between fusible link 36 and radio and CD player or CD changer connector C-16 (terminal 30) in good condition? 

   YES:  Go to Step 7.

   NO:  The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.

7. STEP 7. Check the wiring harness between ETACS-ECU connector C-309 (terminal 2) and fusible link (37) 
   NOTE: Also check ETACS-ECU connector C-307, C-317 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If ETACS-ECU connector C-307, C-317 is damaged, repair or replace the connector as described in HARNESS CONNECTOR INSPECTION .
   • Check the power supply line for open circuit and short circuit.

   Q: Is the wiring harness between ETACS-ECU connector C-309 (terminal 2) and fusible link (37) in good condition? 

   YES:  Go to Step 8.

   NO:  The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.

8. STEP 8. Check ETACS-ECU connector C-315 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Is ETACS-ECU connector C-315 in good condition? 

   YES:  Go to Step 9.

   NO:  Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION .

9. STEP 9. Retest the system 

   Check if the radio and CD player or CD changer power is turned ON.

   Q: Is the check result normal? 

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

   NO:  Replace the radio and CD player or CD changer.