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Home >> Mitsubishi >> 2014 >> Lancer ES Sportback >> Repair and Diagnosis >> External Pages >> Different car >> Section 41 (Electronic Time & Alarm Control System (ETACS) - With Diagnostics) >> Data List Reference Table >> Symptom Procedures >> Malfunction of ETACS-ECU power supply circuit >> Diagnosis

Malfunction of ETACS-ECU power supply circuit: Diagnosis

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tools: 

  1. STEP 1. Resistance measurement at ETACS-ECU connector (GROUND, SGND terminal). 
    1. Disconnect the connector, and measure at the wiring harness side.
    2. Measure the resistance between the ETACS-ECU connector (GROUND terminal) and ground.

      OK: The resistance should be 2 ohms or less 

    3. Measure the resistance between the ETACS-ECU connector (SGND terminal) and ground.

      OK: The resistance should be 2 ohms or less 

    Q: Is the check result normal? 

    1. YES:  Go to  Step 3.
    2. NO:  Go to Step 2.
  2. STEP 2. Check of open circuit in GROUND, SGND line between ETACS-ECU connector and ground. 

    Q: Is the check result normal? 

    1. YES:  The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
    2. NO:  Repair the connector(s) or wiring harness.
  3. STEP 3. Voltage measurement at ETACS-ECU connector (+B terminal). 
    1. Disconnect the connector, and measure at the wiring harness side.
    2. Check the voltage between the ETACS-ECU connector (+B terminal) and ground.

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

    Q: Is the check result normal? 

    1. YES:  Go to  Step 5.
    2. NO:  Go to Step 4.
  4. STEP 4. Check of short to power supply, short to ground, and open circuit in IODI line between fusible link and ETACS-ECU connector. 

    Q: Is the check result normal? 

    1. YES:  The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
    2. NO:  Repair the connector(s) or wiring harness.
  5. STEP 5. Voltage measurement at ETACS-ECU connector (+B1 terminal). 
    1. Disconnect the connector, and measure at the wiring harness side.
    2. Check the voltage between the ETACS-ECU connector (+B1 terminal) and ground.

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

    Q: Is the check result normal? 

    1. YES:  Go to  Step 7.
    2. NO:  Go to Step 6.
  6. STEP 6. Check of short to power supply, short to ground, and open circuit in +B1 line between fusible link and ETACS-ECU connector. 

    Q: Is the check result normal? 

    1. YES:  The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
    2. NO:  Repair the connector(s) or wiring harness.
  7. STEP 7. Retest the system 

    Check that the ETACS-ECU functions work normally.

    Q: Is the check result normal? 

    1. YES:  The trouble can be an intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
    2. NO:  Replace the ETACS-ECU.
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