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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 B1136: Stop light switch >> Diagnosis

DTC B1136: Stop light switch: 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. Check of short to power supply, short of ground and open circuit in STP1 line between stop light switch connector and OSS-ECU connector 
    NOTE: Before the wiring harness check, check the intermediate connector, and repair if necessary.

    Q: Is the check result normal? 

    1. YES:  Go to Step 3
    2. NO:  Repair the connector(s) or wiring harness.
  3. STEP 3. Check of short to power supply, short of ground and open circuit in STP line between stop light switch connector and ETACS-ECU connector 

    Q: Is the check result normal? 

    1. YES:  Go to Step 4
    2. NO:  Repair the connector(s) or wiring harness.
  4. STEP 4. Using scan tool (M.U.T.-III), check 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 SCAN TOOL (M.U.T.-III)  ."
    2. After performing the forced power supply output (refer to FORCED POWER SUPPLY OUTPUT PROCEDURE  ) "IG-ON".
    3. Check the ETACS-ECU data list.
    4. Turn the power supply mode of the engine switch to OFF.

    Q: Is the check result normal? 

    1. YES:  Go to Step 5
    2. NO:  Diagnose the ETACS-ECU. (Refer to TROUBLE SYMPTOM CHART FOR INPUT SIGNAL .)
  5. STEP 5. 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.
      • 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 6
    2. NO:  Replace the OSS-ECU and register the chassis number (Refer to REGISTRATION WHEN REPLACING OSS-ECU  ).
  6. STEP 6. Recheck for diagnostic trouble code. 
    1. Erase the DTC.
    2. Turn the power supply mode of the engine switch from OFF to ON.
    3. Check if DTC is stored.
    4. Turn the power supply mode of the engine switch from ON to OFF.

    Q: Is the DTC 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 MALFUNCTION ).
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