LEMON Manuals: Even more car manuals for everyone
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 B1134: ECU power supply >> Diagnosis

DTC B1134: ECU 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), 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.
      Item No. Check item Normal condition
      18 +B1 Power supply voltage (AD) System voltage
      19 +B2 Power supply voltage (AD) System voltage

      OK: Normal values are displayed for all the items 

    Q: Are the check result normal? 

    1. YES (Normal conditions are displayed for all the items.):  Go to  Step 4.
    2. NO (Normal condition is not displayed for item No. 18.):  Go to Step 2.
    3. NO (Normal condition is not displayed for item No. 19.):  Go to  Step 3.
  2. STEP 2. Check of short to power supply, short to ground, and open circuit in +B1 line between OSS-ECU connector and fusible link 
    NOTE: Before the wiring harness check, check the joint connector, ETACS-ECU connector, and repair if necessary.

    Q: Is the check result normal? 

    1. YES:  Go to  Step 4.
    2. NO:  Repair the connector(s) or wiring harness.
  3. STEP 3. Check of short to power supply, short to ground, and open circuit in +B2 line between OSS-ECU connector and fusible link 
    NOTE: Before the wiring harness check, check the joint connector, ETACS-ECU connector, and repair if necessary.

    Q: Is the check result normal? 

    1. YES:  Go to Step 4.
    2. NO:  Repair the connector(s) or wiring harness.
  4. STEP 4. 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 ).
scientia non olet · About LEMON Manuals