B1389

DTC Troubleshooting: B1389

DTC B1389:

Power Tailgate Motor Clutch Circuit Malfunction

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.

1. Open the tailgate.

2. Close the tailgate automatically with the keyless transmitter or inside tailgate switch.

3. Turn the ignition switch to LOCK (0), and then back to ON (II).

4. Clear the DTCs with the HDS.

5. Check for DTCs with the HDS.

Is DTC B1389 indicated?

YES -

Go to step 6.

NO -

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

6. Turn the ignition switch to LOCK (0).

7. Open the tailgate.

8. Disconnect power tailgate control unit connector B (20P).

9. Check for continuity between power tailgate control unit connector B (20P) terminals No. 9 and No. 20 and body ground individually.





Is there continuity?

YES -

Repair a short to ground in the wire. If the wire is OK, replace the power tailgate drive unit Service and Repair.�

NO -

Go to step 10.

10. Measure the voltage between power tailgate control unit connector B (20P) terminal No. 12 and body ground.





Is there battery voltage?

YES -

Replace the power tailgate control unit.�

NO -

Check the No. 17 (20 A) fuse in the driver's under-dash fuse/relay box. If the fuse is OK, check for an open or high resistance in the wire between the driver's under-dash fuse/relay box and the power tailgate control unit.�