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Home >> Mitsubishi >> 2014 >> Lancer ES Sportback >> Repair and Diagnosis >> External Pages >> Different car >> Section 39 (Keyless Operation System (Kos) - With Diagnostics) >> Diagnosis < OSS-Ecu > >> Symptom Procedures >> Inspection Procedure 5: Engine does not start. (cranking is not performed) >> Diagnosis

Inspection Procedure 5: Engine does not start. (cranking is not performed): 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.
  1. STEP 1. Battery check 

    Perform the battery test to check the battery status. (Refer to BATTERY .)

    Q: Is the check result normal? 

    1. YES:  Go to Step 2
    2. NO:  Replace the battery.
  2. STEP 2. Using scan tool (M.U.T.-III), read the diagnostic trouble code. 
    CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (M.U.T.-III).
    1. Connect scan tool (M.U.T.-III). Refer to "HOW TO CONNECT SCAN TOOL (M.U.T.-III)  ."
    2. Turn the power supply mode of the engine switch to ON.
    3. Check if the diagnosis trouble code is stored in the OSS-ECU.
    4. Turn the power supply mode of the engine switch to OFF.

    Q: Is the DTC stored? 

    1. YES:  Refer to DIAGNOSTIC TROUBLE CODE CHART  .
    2. NO:  Go to Step 3.
  3. STEP 3. Using scan tool (M.U.T.-III), check data list. 
    CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (M.U.T.-III).
    1. Connect scan tool (M.U.T.-III). Refer to "HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)  ."
    2. Turn the power supply mode of the engine switch to OFF.
    3. Operate the brake pedal.
      • Operate the brake pedal.
        Operation state Item No. Check item Display
        Brake pedal is depressed 3 Stoplight switch ON
        Brake pedal released OFF

        OK: Operation state and data list display agree with each other. 

    Q: Is the check result normal? 

    1. YES:  Go to  Step 5
    2. NO:  Go to Step 4
  4. STEP 4. Stop Light Switch Check 

    Continuity check of stoplight switch (Refer to STOP LIGHT SWITCH CHECK ).

    Q: Is the check result normal? 

    1. YES:  Intermittent malfunction is suspected (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
    2. NO:  Replace the stoplight switch.
  5. STEP 5. Voltage measurement at ETACS-ECU connector (STOE terminal) 
    1. With the ETACS-ECU connector kept connected, measure by backprobing.
    2. Using the scan tool (M.U.T.-III), set the forced power supply output to other than "IG-ST". (Refer to FORCED POWER SUPPLY OUTPUT PROCEDURE  .)
    3. Measure the voltage between the ETACS-ECU connector (STOE terminal) and body ground.

      OK: 1 V or less 

    4. Using the scan tool (M.U.T.-III), set the forced power supply output to "IG-ST". (Refer to FORCED POWER SUPPLY OUTPUT PROCEDURE  .)
    5. Measure the voltage between the ETACS-ECU connector (STOE terminal) and body ground.

      OK: System voltage 

    Q: Is the check result normal? 

    1. YES:  Go to Step 6
    2. NO:  Replace the OSS-ECU and register the VIN (Refer to REGISTRATION WHEN REPLACING OSS-ECU  ).
  6. STEP 6. Using scan tool (M.U.T.-III) other system data list 
    CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (M.U.T.-III).
    1. Connect scan tool (M.U.T.-III). Refer to "HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)  ."
    2. Turn the power supply mode of the engine switch to OFF.
    3. Using the M.U.T.-III, set the forced power supply output to "IG-ST". (Refer to FORCED POWER SUPPLY OUTPUT PROCEDURE  .)
    4. Check the engine control module data list.
      Item No. Check item Display
      79 Cranking signal (Ignition switch-ST) ON

      OK: Operation state and data list display agree with each other. 

    5. Using the scan tool (M.U.T.-III), set the forced power supply output to other than "IG-ST". (Refer to FORCED POWER SUPPLY OUTPUT PROCEDURE  .)
    6. Check the engine control module data list.
      Item No. Check item Display
      79 Cranking signal (Ignition switch-ST) OFF

      OK: Operation state and data list display agree with each other. 

    Q: Is the check result normal? 

    1. YES:  Go to  Step 8
    2. NO:  Go to Step 7
  7. STEP 7. Check of open circuit in STOE line between ETACS-ECU connector and engine control module connector 

    Q: Is the check result normal? 

    1. YES:  Replace the engine control module and register the VIN and key codes (Refer to HOW TO PERFORM VIN WRITING ).
    2. NO:  Repair the connector(s) or wiring harness.
  8. STEP 8. Check of the troubles 

    Check whether the engine is started (cranking is performed).

    Q: Is the check result normal? 

    1. YES:  Intermittent malfunction is suspected (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
    2. NO:  There is a problem with the engine starting circuit system of engine control module. Carry out the troubleshooting relevant to the engine starting circuit system. (Refer to DTC CHART < 2.4 L ENGINE >, DTC CHART < 3.0 L ENGINE >)
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