DESCRIPTION

When the back door cannot be opened, one of the following may be the cause: 1) power back door ECU malfunction, 2) back door lock malfunction, 3) back door open switch malfunction, 4) main body ECU malfunction, 5) back door ECU malfunction, 6) power source circuit malfunction, or 7) position SW in prohibit condition. In the case that a fault is detected at the position switch, the back door stops functioning when the door position is full-latch (system prohibits opening of the door). Thereafter, the system prohibits back door operation until it detects a power reset of the ECU.

HINT:

Since the power back door system has functions that use CAN and LIN communication, first confirm that there is no malfunction in the communication system by inspecting the CAN and LIN communication functions in accordance with the "How to Proceed with Troubleshooting" procedures. Then, conduct the following inspection procedure.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

(a) Remove the ECU- IG NO.2, ECU-B1 and PBD fuses.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

(c) Reinstall the fuses.

OK

(a) Disconnect the O30 power back door ECU connector.

(b) Measure the voltage according to the value(s) in the table below. Standard Voltage: Tester Connection Condition Specified Condition O30-8 (IG) - Body ground Ignition switch ON 11 to 14 V O30-10 (ECUB) - Body ground Always 11 to 14 V O30-12 (B) - Body ground Always 11 to 14 V