DTC : B2618, B261B

DTC B2618  : Front 1st Sensor Data Failure

DTC B261B  : Front 4th Sensor Data Failure

NOTE: 

• If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Go to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks .
• Before you troubleshoot, resetting the Parking and Back-Up Sensor Control Unit .
• The count of the number of the sensor starts from the sensor near to the control unit.

DTC (Parking and Back-Up Sensor Control Unit)

1. Problem verification

   - 1. Clear the DTCs with the HDS.

   Clear DTCs

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

   - 3. Wait for at least 6 seconds.

   - 4. Check for DTCs with the HDS.

   DTC Description	DTC
   B2618 Front 1st sensor data failure
   B261B Front 4th sensor data failure

   Is DTC B2618 and/or B261B indicated?

   YES 

   Go to step 2.

   NO 

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

2. DTC check

   - 1. Check for DTCs with the HDS.

   DTC Description	DTC
   B2618 Front 1st sensor data failure
   B261B Front 4th sensor data failure
   B2646 Front sensor power failure
   B2648 Front sensor signal short to ground

   Is DTC B2618, B261B, B2646, and/or B2648 indicated?

   YES: B2618 and B261B indicated

   Go to step 3.

   YES: B261B indicated

   Go to step 4.

   YES: B2646 indicated

   Go to parking and back-up sensor system DTC B2646  troubleshooting.

   YES: B2648 indicated

   Go to parking and back-up sensor system DTC B2648 troubleshooting.

   NO 

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

3. Open wire check (FSP L, FSS L, FSG L lines)

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

   - 2. Disconnect the following connectors.

   Parking and back-up sensor control unit 16P connector Right front corner sensor 6P connector

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

   Test condition	Vehicle OFF (LOCK) mode Parking and back-up sensor control unit 16P connector: disconnected Right front corner sensor 6P connector: disconnected
   Test point 1	Parking and back-up sensor control unit 16P connector No. 7 - Refer to: Parking and Back-Up Sensor Control Unit Connector for Inputs and Outputs (2016 2017 2018) or Parking and Back-Up Sensor Control Unit Connector for Inputs and Outputs (2019 2020 2021) .
   Test point 2	Right front corner sensor 6P connector (female terminals) No. 6: (1)

   Test point 1	Parking and back-up sensor control unit 16P connector No. 6 - Refer to: Parking and Back-Up Sensor Control Unit Connector for Inputs and Outputs (2016 2017 2018) or Parking and Back-Up Sensor Control Unit Connector for Inputs and Outputs (2019 2020 2021) .
   Test point 2	Right front corner sensor 6P connector (female terminals) No. 4: (1)

   Test point 1	Parking and back-up sensor control unit 16P connector No. 13 - Refer to: Parking and Back-Up Sensor Control Unit Connector for Inputs and Outputs (2016 2017 2018) or Parking and Back-Up Sensor Control Unit Connector for Inputs and Outputs (2019 2020 2021) .
   Test point 2	Right front corner sensor 6P connector (female terminals) No. 2: (1)

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Replace the right Front Corner Sensor .

   NO 

   Repair an open or high resistance in FSP L, FSS L, or FSG L wire between the parking and back-up sensor control unit and the right front corner sensor.

4. Open wire check (FSP R, FSS R, FSG R lines)

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

   - 2. Disconnect the following connectors.

   Right front corner sensor 6P connector Left front corner sensor 6P connector

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

   Test condition	Vehicle OFF (LOCK) mode Right front corner sensor 6P connector: disconnected Left front corner sensor 6P connector: disconnected
   Test point 1	Right front corner sensor 6P connector (female terminals) No. 5: (1)
   Test point 2	Left front corner sensor 6P connector (female terminals) No. 6: (2)

   Test point 1	Right front corner sensor 6P connector (female terminals) No. 3: (1)
   Test point 2	Left front corner sensor 6P connector (female terminals) No. 4: (2)

   Test point 1	Right front corner sensor 6P connector (female terminals) No. 1: (1)
   Test point 2	Left front corner sensor 6P connector (female terminals) No. 2: (2)

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Replace the left Front Corner Sensor .

   NO 

   Repair an open or high resistance in FSP R, FSS R, or FSG R wire between the right front corner sensor and the left front corner sensor.