DTC B1387

DTC B1387  : Power Tailgate sensor Pulse B circuit malfunction

NOTE: 

• If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .
• If the motor does not operate, do the motor test first .

DTC (Power Tailgate Control Unit)

1. Problem verification 1

   -1. Clear the DTCs with the HDS.

   -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
   B1387 Power Tailgate sensor Pulse B circuit malfunction

   Is DTC B1387 indicated?

   YES 

   Go to step 2.

   NO 

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

2. Problem verification 2

   -1. 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 3.

   NO 

   Go to step 4.

3. Shorted wire check (PTG/PTL_SVCC line)

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

   -2. Disconnect the following connector.

   Power tailgate drive unit connector B (6P)

   -3. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF(LOCK) mode Power tailgate drive unit connector B (6P): disconnected
   Test point 1	Power tailgate drive unit connector B (6P) (male terminals) No. 4:
   Test point 2	Body ground

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

   Is there 1.0 MΩ or more?

   YES 

   Replace the power tailgate control unit .

   NO 

   Repair a short to ground in the wire.

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

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

   -2. Disconnect the following connector.

   Power tailgate 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 Power tailgate drive unit connector B (6P): disconnected
   Test point 1	Power tailgate drive unit connector B (6P) (male terminals) No. 3:
   Test point 2	Body ground

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

   Is there about 5V?

   YES 

   Faulty power tailgate sensor; replace the power tailgate drive unit .

   NO 

   Go to step 5.

5. Shorted wire check (PTG/PTL_SENB line)

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

   -2. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode Power tailgate drive unit connector B (6P): disconnected
   Test point 1	Power tailgate drive unit connector B (6P) (male terminals) No. 3:
   Test point 2	Body ground

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

   Is there 1.0 MΩ or more?

   YES 

   Go to step 6.

   NO 

   Repair a short to ground in the wire.

6. Open wire check (PTG/PTL_SENB line)

   -1. Disconnect the following connector.

   Power tailgate control unit connector A (24P)

   -2. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode Power tailgate drive unit connector B (6P): disconnected Power tailgate control unit connector A (24P): disconnected
   Test point 1	Power tailgate drive unit connector B (6P) (male terminals) No. 3:
   Test point 2	Power tailgate control unit connector A (24P) No. 16

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

   Is there 1.0 Ω or less?

   YES 

   Replace the power tailgate control unit .

   NO 

   Repair an open or high resistance in the wire.