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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 > >> Diagnostic Trouble Code Procedures >> DTC B1130: Ignition power supply >> Diagnosis

DTC B1130: Ignition power supply: 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. Using scan tool (M.U.T.-III), diagnose the CAN bus line. 
    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. Diagnose the CAN bus line.
    4. Turn the power supply mode of the engine switch to OFF.

    Q: Is the CAN bus line found to be normal? 

    1. YES:  Go to Step 2.
    2. NO:  Repair the CAN bus line (Refer to DIAGNOSIS ).
  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 OSS-ECU DTC B1131 or B1133 is stored.
    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 engine switch to change the power supply mode, and check that the data list display of ETACS-ECU is changed.
      ETACS-ECU DATA LIST

      ETACS-ECU data list
      Item No. Check item Display
      288 ACC switch ON
      ETACS-ECU DATA LIST

      ETACS-ECU data list
      Item No. Check item Display
      254 IG voltage System voltage
      ETACS-ECU DATA LIST

      ETACS-ECU data list
      Item No. Check item Display
      287 Starter switch ON

    Q: Is the check result normal? 

    All items agree with each other:  Intermittent malfunction is suspected (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).

    Do not match when power supply mode is ACC:  Go to Step 4.

    Do not match when power supply mode is ON:  Go to  Step 5.

    Do not match when power supply mode is START (during cranking):  Go to  Step 6.

  4. STEP 4. Check of short to power supply, short to ground and open circuit in ACC line between OSS-ECU connector and ETACS-ECU connector 
    NOTE: Before the wiring harness check, check the joint connector, and repair if necessary.

    Q: Is the check result normal? 

    1. YES:  Go to  Step 7.
    2. NO:  Repair the connector(s) or wiring harness.
  5. STEP 5. Check of short to power supply, short to ground and open circuit in IG1 line between OSS-ECU connector and ETACS-ECU connector 
    NOTE: Before the wiring harness check, check the joint connector, and repair if necessary.

    Q: Is the check result normal? 

    1. YES:  Go to  Step 7.
    2. NO:  Repair the connector(s) or wiring harness.
  6. STEP 6. Check of short to power supply, short to ground and open circuit in STO line between OSS-ECU connector and ETACS-ECU connector 

    Q: Is the check result normal? 

    1. YES:  Go to Step 7.
    2. NO:  Repair the connector(s) or wiring harness.
  7. STEP 7. 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. Check the OSS-ECU data list. (Check only where a problem is present.)
      • Using the M.U.T.-III, perform the forced power supply output.
        State of forced power supply output Item No. Check item Display
        IG-ON 15 IG1 output (monitor) ON
        OFF
        IG-ST 13 Cranking signal output (monitor) ON
        OFF

        OK: Depending on the state of forced power supply output, the display is turned ON/OFF. 

    Q: Is the check result normal? 

    1. YES:  Go to Step 8.
    2. NO:  Replace the OSS-ECU and register the chassis number (Refer to REGISTRATION WHEN REPLACING OSS-ECU  ).
  8. STEP 8. 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 engine switch to change the power supply mode, and check that the data list display of ETACS-ECU is changed. (Check only where a problem is present.)
      ETACS-ECU DATA LIST

      ETACS-ECU data list
      Item No. Check item Display
      288 ACC switch ON
      ETACS-ECU DATA LIST

      ETACS-ECU data list
      Item No. Check item Display
      254 IG voltage System voltage
      ETACS-ECU DATA LIST

      ETACS-ECU data list
      Item No. Check item Display
      287 Starter switch ON

    Q: Is the check result normal? 

    The power supply mode and data list change agree with each other:  Go to Step 9.

    The power supply mode and data list change do not agree with each other:  Replace the ETACS-ECU.

  9. STEP 9. Recheck for diagnostic trouble code. 

    Check again if the DTC is stored in the OSS-ECU.

    1. Erase the DTC.
    2. Turn the engine switch from "LOCK" (OFF) position to "ON" position.
    3. On completion, check that the DTC is not stored again.

    Q: Is the diagnostic trouble code stored? 

    1. YES:  Replace the OSS-ECU and register the VIN (Refer to REGISTRATION WHEN REPLACING OSS-ECU  ).
    2. NO:  Intermittent malfunction is suspected (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS ).
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