How to Troubleshoot Power Tailgate Control System

Power tailgate control unit has the self-diagnosis function that can detect failure without HDS.

- If the power tailgate system has a failure, the system will initiate fail-safe mode, and ignition switch turned ON (II), the power tailgate indicator will start to blink.
- In case the ignition switch is turned ON (II) again, if the tailgate system detects the same reoccurring failure, the system will initiate fail-safe mode and the power tailgate indicator will come on (no blinking).

How to troubleshooting

1. Turn the ignition switch ON (II).

1. Connect the SCS connector (A) to the power tailgate inspection connector (B).
   - If the ignition switch is turned OFF or SCS connector is disconnected while the safe-diagonals function is working, the safe-diagnosis function stops.
   - If the power tailgate control unit does not memorize DTC, the power tailgate indicator turns on for 3 seconds, then the self-diagnosis is complete.

1. The power tailgate indicator displays DTCs in occurrence order while system is in self-diagnosis mode.

DTC | Cause
--- | ---
2 | Faulty power tailgate outer handle switch
3 | Faulty power tailgate inner switch
11 | Faulty right power tailgate touch sensor
12 | Faulty left power tailgate touch sensor
34 | Faulty open switch of closer unit
35 | Faulty close switch of closer unit
31 | Faulty ratchet switch of closer unit
32 | Faulty full latch switch of closer unit
33 | Faulty half latch switch of closer unit
13 | Faulty temperature sensor
14 | Faulty power tailgate sensor A circuit
15 | Faulty power tailgate sensor B circuit
21 | Faulty power tailgate motor circuit
22 | Faulty power tailgate clutch circuit
36 | Faulty power tailgate closer motor circuit
43 | Faulty EEPROM
44 | Faulty BUS OFF line of B-CAN communication line
45 | Can not receive MICU flame (B1355), DRLOCK flame (B1356), VSP/NE flame (B1357) of B-CAN communication

DTC patterns

How to exit self-diagnosis mode

1. Connect HDS to Data Link Connector (DLC).

1. Clear the DTCs by selecting the DTCs MENU (DTCs).