DTC B1390

DTC B1390  : Power Tailgate Closer Motor circuit malfunction

NOTE: 

• If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .
• Before troubleshooting, make sure the fuses and relays associated with the system is OK.

DTC (Power Tailgate Control Unit)

1. Problem verification

   -1. Clear the DTCs with the HDS.

   -2. With the tailgate closed, press the tailgate outer handle switch and wait for 10 seconds.

   -3. Check for DTCs with the HDS.

   DTC Description	DTC
   B1390 Power Tailgate Closer Motor circuit malfunction

   Is DTC B1390 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 power tailgate system DTCs with the HDS.

   DTC Description	DTC

   Are any DTCs indicated?

   YES 

   Go to the indicated DTCs troubleshooting, then recheck.

   NO 

   Go to step 3.

3. Open wire check (PTG/PTL_CLM+ line)

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

   -2. Disconnect the following connectors.

   Power tailgate closer unit connector A (2P) Power tailgate control unit connector B (10P)

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

   Test condition	Vehicle OFF (LOCK) mode Power tailgate closer unit connector A (2P): disconnected Power tailgate control unit connector B (10P): disconnected
   Test point 1	Power tailgate closer unit connector A (2P) (female terminals) No. 2:
   Test point 2	Power tailgate control unit connector B (10P) No. 2

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

   Is there 1.0 Ω or less?

   YES 

   The PTG/PTL_CLM+ wire is OK. Go to step 4.

   NO 

   Repair an open or high resistance in the wire.

4. Open wire check (PTG/PTL_CLM- line)

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

   Test condition	Vehicle OFF (LOCK) mode Power tailgate closer unit connector A (2P): disconnected Power tailgate control unit connector B (10P): disconnected
   Test point 1	Power tailgate closer unit connector A (2P) (female terminals) No. 1:
   Test point 2	Power tailgate control unit connector B (10P) No. 6

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

   Is there 1.0 Ω or less?

   YES 

   Faulty closer motor; replace the power tailgate closer unit .

   NO 

   Repair an open or high resistance in the wire.