BODY EXTERIOR, DOORS, ROOF & VEHICLE SECURITY › DOOR & LOCK › COMPONENT DIAGNOSIS

OUTSIDE KEY ANTENNA

Description

Detects whether Intelligent Key is outside the vehicle.
Integrated in outside handle (LH, RH) and installed in rear bumper.

1.CHECK OUTSIDE KEY ANTENNA FUNCTION

Check that Intelligent Key is in each outside key antenna detection range.

Does door lock/unlock when each request switch is pressed?

YES>>Outside key antenna is OK.

NO>>Refer to Diagnosis Procedure.

1.CHECK OUTSIDE KEY ANTENNA INPUT SIGNAL 1

Check signal between BCM harness connector and ground with oscilloscope.

(+)			(–)	Condition		Signal (Reference value.)
BCM
Connector		Terminal
M122	LH	76, 77	Ground	Door request switch or trunk lid opener request switch is pushed	When Intelligent Key is in the antenna detection area.
	RH	74, 75
M121	Rear bumper	38, 39			When Intelligent Key is not in the antenna detection area.

Is the inspection result normal?

YES>>Replace BCM. Refer to Removal and Installation

NO>>GO TO 2.

2.CHECK OUTSIDE KEY ANTENNA CIRCUIT

Is the inspection result normal?

YES>>GO TO 3.

NO>>Repair or replace harness.

3.CHECK OUTSIDE KEY ANTENNA INPUT SIGNAL 2

Replace malfunctioning outside key antenna. Refer to Removal and Installation or Removal and Installation, Removal and Installation.
Connect BCM connector and outside key antenna connector.

Check signal between BCM harness connector and ground with oscilloscope.

(+)			(–)	Condition		Signal (Reference value.)
BCM
Connector		Terminal
M122	LH	76, 77	Ground	Door request switch or trunk lid opener request switch is pushed	When Intelligent Key is in the antenna detection area.
	RH	74, 75
M121	Rear bumper	38, 39			When Intelligent Key is not in the antenna detection area.

Is the inspection result normal?

YES>>INSPECTION END

NO>>Replace BCM. Refer to Removal and Installation.