DTC B1390: Power Tailgate Closer Motor Function Error

DTC Description	DTC
B1390 Power Tailgate Closer Motor Function Error

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won't Shut OFF Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON .

1. Problem verification:

1. Clear the DTCs with the HDS.

2. With the tailgate closed, push 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 Function Error

Is DTC B1390 indicated?

YES

Go to step 2.

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

2. DTC check:
1. Check for power tailgate system DTCs with the HDS.

DTC (Power Tailgate Control Unit)

Are any DTCs indicated?

YES

Go to the indicated DTCs troubleshooting, then recheck.

NO

Go to step 3.

3. Fuse check:

1. Check the following fuse.

Fuse	No. B26 (20 A)
Location	Under-dash fuse/relay box

Is the fuse OK?

YES

Go to step 4.

Replace the fuse. If the fuse blows again, repair a short to ground in the No. B26 (20 A) fuse circuit.

4. 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 (20P)

3. Check for continuity 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 (20P): disconnected

Test point 1

Power tailgate closer unit connector A (2P) No. 1

Test point 2

Power tailgate control unit connector B (20P) No. 2

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

Is there continuity?

YES

The PTG/PTL CLM+ wire is OK. Go to step 5.

Repair an open or high resistance in the wire.

5. Open wire check (PTG/PTL CLM- line):

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