DTC B2637-11 (2021)

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 (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 .