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Home >> Mitsubishi >> 2014 >> Lancer ES Sportback >> Repair and Diagnosis >> External Pages >> Different car >> Section 90 (Lane Departure Warning System (LDWS) - With Diagnostics) >> Diagnosis Function >> Diagnostic Trouble Code Procedures >> DTC C1705: LDW SW circuit low (short) >> Diagnosis

DTC C1705: LDW SW circuit low (short): 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. 

    Check the ETACS-ECU service data.

    CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (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. Check the input signals from the LDW switch.
      • When the LDW switch is pressed.
        Item No. Item name Normal condition
        Item 405 LDW switch ON

        OK: Normal condition is displayed. 

      • When the LDW switch is not pressed.
        Item No. Item name Normal condition
        Item 405 LDW switch OFF

        OK: Normal condition is displayed. 

    Q: Is the check result normal? 

    1. YES:  Go to Step 2
    2. NO:  Troubleshoot the ETACS-ECU. Refer to INSPECTION PROCEDURE 16: THE LDW SWITCH SIGNAL IS NOT RECEIVED .
  2. STEP 2. Using scan tool (M.U.T.-III), check data list. 

    Check the LDW-ECU service data.

    • When the LDW switch is pressed.
      Item No. Item name Normal condition
      Item 18 LDW switch ON
    • When the LDW switch is not pressed.
      Item No. Item name Normal condition
      Item 18 LDW switch OFF

      OK: Normal condition is displayed. 

    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 LDW-ECU.