DTC : B1386 (2016 2017 2018)

DTC B1386  : Power Tailgate sensor Pulse A circuit malfunction

DTCs (Power Tailgate Control Unit)

• NOTE:  If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks .
• If the motor does not operate, do the Power Tailgate Motor Test first.

1. Problem verification 1

   - 1. Clear the DTCs with the HDS.

   Clear DTCs

   - 2. Open the tailgate with the tailgate outer handle switch.

   - 3. Close the tailgate automatically with the keyless transmitter or power tailgate inside switch.

   - 4. Check for DTCs with the HDS.

   DTC Description	DTC
   B1386 Power Tailgate sensor Pulse A circuit malfunction

   Is DTC B1386 indicated?

   YES 

   Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for loose or poor connections between the power tailgate control unit and the drive unit.

2. Problem verification 2

   - 1. Check for DTCs with the HDS.

   DTC Description	DTC
   B1387 Power Tailgate sensor Pulse B circuit malfunction

   Is DTC B1387 indicated?

   YES 

   Go to step 3.

   NO 

   Go to step 4.

3. Shorted wire check (PTG SVCC line)

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

   - 2. Disconnect the following connector.

   Drive unit connector B (6P)

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

   Test condition	Vehicle OFF (LOCK) mode Drive unit connector B (6P): disconnected
   Test point 1	Drive unit connector B (6P) No. 1
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Repair a short to ground in the wire.

   NO 

   Replace the Power Tailgate Control Unit .

4. Determine possible failure area (power tailgate sensor, others)

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

   - 2. Disconnect the following connector.

   Drive unit connector B (6P)

   - 3. Turn the vehicle to the ON mode.

   - 4. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode Drive unit connector B (6P): disconnected
   Test point 1	Drive unit connector B (6P) No. 4
   Test point 2	Body ground

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

   Is there about 5V?

   YES 

   Faulty power tailgate sensor; replace the drive unit - Go to: Tailgate Support Strut (With Power Tailgate) .

   NO 

   Go to step 5.

5. Shorted wire check (PTG SENA line)

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

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

   Test condition	Vehicle OFF (LOCK) mode Drive unit connector B (6P): disconnected
   Test point 1	Drive unit connector B (6P) No. 4
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Repair a short to ground in the wire.

   NO 

   Go to step 6.

6. Open wire check (PTG SENA line)

   - 1. Disconnect the following connector.

   Power tailgate control unit connector B (20P)

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

   Test condition	Vehicle OFF (LOCK) mode Drive unit connector B (6P): disconnected Power tailgate control unit connector B (20P): disconnected
   Test point 1	Drive unit connector B (6P) No. 4
   Test point 2	Power tailgate control unit connector B (20P) No. 17 - Refer to: Power Tailgate Control Unit Connector for Inputs and Outputs (2016 2017 2018)

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

   Is there continuity?

   YES 

   Replace the Power Tailgate Control Unit .

   NO 

   Repair an open or high resistance in the wire.