Diagnosis Procedure

1. Turn ignition switch OFF.
2. Check signal between BCM harness connector and ground using an oscilloscope.
   SIGNAL REFERENCE CHART
   
   

   Terminals				Condition	Signal (Reference value)
   (+)			(-)
   BCM connector		Terminal
   M121	Luggage room	34, 35	Ground	Place Intelligent Key inside the vehicle.
   				Place Intelligent Key outside the vehicle.

   Is the inspection result normal? 

   YES: GO TO  4.

   NO: GO TO 2.

1. Disconnect BCM and inside key antenna (luggage room) connector.
2. Check continuity between BCM harness connector and inside key antenna (luggage room) harness connector.
   CONTINUITY REFERENCE CHART
   
   

   BCM		Inside key antenna		Continuity
   Connector	Terminal	Connector	Terminal
   M121	34	B228	2	Existed
   	35		1

3. Check continuity between BCM harness connector and ground.
   CONTINUITY REFERENCE CHART
   
   

   BCM			Ground	Continuity
   Connector		Terminal
   M121	Luggage room	34		Not existed
   		35

   Is the inspection result normal? 

   YES: GO TO 3.

   NO: Repair or replace harness.

1. Replace inside key antenna (luggage room). (New antenna or other antenna)
2. Connect BCM and inside key antenna (luggage room) connector.
3. Check signal between BCM harness connector and ground using an oscilloscope.
   SIGNAL REFERENCE CHART
   
   

   (+)			(-)	Condition	Signal (Reference value)
   BCM
   Connector		Terminal
   M121	Luggage room	34, 35	Ground	Place Intelligent Key inside the vehicle.
   				Place Intelligent Key outside the vehicle.

   Is the inspection result normal? 

   YES: Replace inside key antenna (luggage room). Refer to "LUGGAGE ROOM : REMOVAL AND INSTALLATION ".

   NO: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

Refer to "INTERMITTENT INCIDENT ".

INSPECTION END