Intelligent Key Unit Power Back Door Input Signal

INTELLIGENT KEY UNIT POWER BACK DOOR INPUT SIGNAL


Description

Carrying the Intelligent Key, enables the driver to open the liftgate using the back door handle even when the vehicle is locked. When lifting the handle, the back door handle switch sends this signal to the Intelligent Key unit which treats it as a request switch signal. When the Intelligent Key unit, using the rear bumper antenna, validates the presence of the Intelligent Key, it sends an open signal to the back door control unit regardless whether the vehicle is locked.
Rear bumper antenna is mounted on the rear bumper and is used to allow the back door handle opening of the locked back door when the Intelligent Key is present.





INTELLIGENT KEY UNIT POWER BACK DOOR INPUT SIGNAL


Diagnosis Procedure

Regarding Wiring Diagram information, With Intelligent Key System.
1.BACK DOOR HANDLE SWITCH SIGNAL INSPECTION
With all doors unlocked, check the back door handle operation by lifting the handle.
Did the back door respond correctly by opening?
YES - GO TO 2
NO - With Intelligent Key System.
2.KEYFOB SIGNAL INSPECTION
Check keyfob operation using lock and unlock buttons.
Did the keyfob operate correctly?
YES - GO TO 3
NO - Diagnosis Procedure.
3.INTELLIGENT KEY UNIT SIGNAL INSPECTION

NOTE:
Since the diode is a uni-directional component, pay close attention to the polarity of the ohmmeter being used as the presence of a diode in the circuit will affect the result.
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit, back door handle switch and back door control unit connectors.





3. Check continuity between Intelligent Key unit connector (A) M70 terminal 29 and back door handle switch connector (B) D706 terminal 1.

29 (+) - 1 (-) : Continuity should exist.

4. Check continuity between Intelligent Key unit connector (A) M70 terminal 29 and ground.

29 (+) - Ground (-) : Continuity should not exist.

Is the inspection result normal?
YES - Replace the Intelligent Key unit.
NO - Repair or replace the harness or the diode as necessary.