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Home >> Mitsubishi >> 2014 >> Lancer GT >> Repair and Diagnosis >> External Pages >> Different car >> Section 37 (Supplemental Restraint System (SRS) - With Diagnostics) >> SRS Air Bag Diagnosis >> Diagnostic Trouble Code Procedures < Occupant Classification-Ecu > >> DTC B1691: Occupant sensing antenna; DTC B1693: Occupant sensing antenna open; DTC B1694: Occupant sensing ANT.SHT to GND; DTC B1695: Occupant sensing ANT.SHT to BAT >> Diagnosis

DTC B1691: Occupant sensing antenna; DTC B1693: Occupant sensing antenna open; DTC B1694: Occupant sensing ANT.SHT to GND; DTC B1695: Occupant sensing ANT.SHT to BAT: 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 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 THE SCAN TOOL  ."
    2. Turn the ignition switch to the "ON" position.
    3. Diagnose the CAN bus line.
    4. Turn the ignition switch to the "LOCK" (OFF) position.

    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 whether the front passenger's seat is damped with liquid or steam. 

    Check whether the front passenger's seat is damped with liquid or steam.

    Q: Is the check result normal? 

    1. YES:  Go to Step 3.
    2. NO:  Replace the front seat cushion cover and pad assembly (Refer to FRONT SEAT ASSEMBLY ).
  3. STEP 3. Recheck for diagnostic trouble code. 

    Check again if the DTC is stored.

    1. Erase the DTC.
    2. Turn the ignition switch to the "ON" position.
    3. Check if the DTC is stored.
    4. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Is the DTC stored? 

    1. YES:  Go to Step 4.
    2. NO:  There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
  4. STEP 4. Check open circuit in GND line between occupant classification-ECU connector and body ground. 

    Q: Is the check result normal? 

    1. YES:  Go to Step 5.
    2. NO:  The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
  5. STEP 5. Check of short to power supply, short to ground, and open circuit in SENSE, GUARD line between occupant classification-ECU connector and occupant classification sensor connector. 

    Q: Is the check result normal? 

    1. YES:  Go to Step 6.
    2. NO:  The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
  6. STEP 6. Recheck for diagnostic trouble code. 

    Check again if the DTC is stored in the occupant classification-ECU.

    1. Erase the DTC.
    2. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
    3. Check if DTC is stored.
    4. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Is the DTC stored? 

    1. YES:  Replace the front seat cushion cover and pad assembly (Refer to FRONT SEAT ASSEMBLY ).
    2. NO:  There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
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