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DTC B2637-11 (2021)

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DTC B2637-11  : Short to Ground in The Sensor Power Supply Line

NOTE:  If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .

DTC Description DTC
B2637-11 Short to Ground in The Sensor Power Supply Line  

DTC (Parking and Back-Up Sensor Control Unit)

  1. Problem verification

    -1. Clear the DTCs with the HDS.

    -2. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

    -3. Check for DTCs with the HDS.

    DTC Description DTC
    B2637-11 Short to Ground in The Sensor Power Supply Line  

    Is DTC B2637-11 indicated?

    YES 

    Go to step 2.

    NO 

    Intermittent failure, the system is OK at this time. Check for loose or poor connections.

  2. Determine possible failure area (BOF SIDE L line to ground, others)

    -1. Turn the vehicle to the OFF (LOCK) mode.

    -2. Disconnect the following connector.

    Parking and back-up sensor control unit 24P connector

    -3. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    Parking and back-up sensor control unit 24P connector: disconnected
    Test point 1 Parking and back-up sensor control unit 24P connector No. 2
    Test point 2 Body ground

    Is there continuity?

    YES 

    Go to step 4.

    NO 

    The BOF SIDE L wires are OK. Go to step 3.

  3. Determine possible failure area (BOR SIDE L line to ground, parking and back-up sensor control unit)

    -1. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    Parking and back-up sensor control unit 24P connector: disconnected
    Test point 1 Parking and back-up sensor control unit 24P connector No. 14
    Test point 2 Body ground

    Is there continuity?

    YES 

    Go to step 8.

    NO 

    Replace the parking and back-up sensor control unit .

  4. Determine possible failure area (Left front corner sensor, others)

    -1. Disconnect the following connector.

    Left front corner sensor 3P connector

    -2. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    Parking and back-up sensor control unit 24P connector: disconnected
    Left front corner sensor 3P connector: disconnected
    Test point 1 Parking and back-up sensor control unit 24P connector No. 2
    Test point 2 Body ground

    Is there continuity?

    YES 

    Go to step 5.

    NO 

    Replace the left front corner sensor .

  5. Determine possible failure area (Right front corner sensor, others)

    -1. Disconnect the following connector.

    Right front corner sensor 3P connector

    -2. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    Parking and back-up sensor control unit 24P connector: disconnected
    Right front corner sensor 3P connector: disconnected
    Test point 1 Parking and back-up sensor control unit 24P connector No. 2
    Test point 2 Body ground

    Is there continuity?

    YES 

    Repair a short to ground in the BOF SIDE L wires.

    YES 

    Go to step 6.

    NO 

    Replace the right front corner sensor .

  6. Determine possible failure area (Left front center sensor, others)

    -1. Disconnect the following connector.

    Left front center sensor 3P connector

    -2. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    Parking and back-up sensor control unit 24P connector: disconnected
    Left front center sensor 3P connector: disconnected
    Test point 1 Parking and back-up sensor control unit 24P connector No. 2
    Test point 2 Body ground

    Is there continuity?

    YES 

    Go to step 7.

    NO 

    Replace the left front center sensor .

  7. Shorted wire check (BOF SIDE L line)

    -1. Disconnect the following connector.

    Right front center sensor 3P connector

    -2. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    Parking and back-up sensor control unit 24P connector: disconnected
    Right front center sensor 3P connector: disconnected
    Test point 1 Parking and back-up sensor control unit 24P connector No. 2
    Test point 2 Body ground

    Is there continuity?

    YES 

    Repair a short to ground in the BOF SIDE L wire.

    NO 

    Replace the right front center sensor .

  8. Determine possible failure area (Left rear corner sensor, others)

    -1. Disconnect the following connector.

    Left rear corner sensor 3P connector

    -2. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    Parking and back-up sensor control unit 24P connector: disconnected
    Left rear corner sensor 3P connector: disconnected
    Test point 1 Parking and back-up sensor control unit 24P connector No. 14
    Test point 2 Body ground

    Is there continuity?

    YES 

    Go to step 9.

    NO 

    Replace the left rear corner sensor .

  9. Determine possible failure area (Left rear center sensor, others)

    -1. Disconnect the following connector.

    Left rear center sensor 3P connector

    -2. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    Parking and back-up sensor control unit 24P connector: disconnected
    Left rear center sensor 3P connector: disconnected
    Test point 1 Parking and back-up sensor control unit 24P connector No. 14
    Test point 2 Body ground

    Is there continuity?

    YES 

    Go to step 10.

    NO 

    Replace the left rear center sensor .

  10. Determine possible failure area (Right rear center sensor, others)

    -1. Disconnect the following connector.

    Right rear center sensor 3P connector

    -2. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    Parking and back-up sensor control unit 24P connector: disconnected
    Right rear center sensor 3P connector: disconnected
    Test point 1 Parking and back-up sensor control unit 24P connector No. 14
    Test point 2 Body ground

    Is there continuity?

    YES 

    Go to step 11.

    NO 

    Replace the right rear center sensor .

  11. Shorted wire check (BOR SIDE L line)

    -1. Disconnect the following connector.

    Right rear corner sensor 3P connector

    -2. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    Parking and back-up sensor control unit 24P connector: disconnected
    Right rear corner sensor 3P connector: disconnected
    Test point 1 Parking and back-up sensor control unit 24P connector No. 14
    Test point 2 Body ground

    Is there continuity?

    YES 

    Repair a short to ground in the BOR SIDE L wires.

    NO 

    Replace the right rear corner sensor .

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