Diagnosis Procedure

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

   (+)			(-)	Condition	Signal (Reference value)
   BCM
   Connector		Terminal
   Trunk room	M121	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 connector and inside key antenna (trunk room) connector.
2. Check continuity between BCM harness connector and inside key antenna (trunk room) harness connector.
   TERMINALS CONTINUITY REFERENCE CHART
   
   

   BCM		Inside key antenna (trunk room)		Continuity
   Connector	Terminal	Connector	Terminal
   M121	34	B49	2	Existed
   	35		1

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

   BCM		Ground	Continuity
   Connector	Terminal
   M121	34		Not existed
   	35

   Is the inspection result normal? 

   YES: GO TO 3.

   NO: Repair or replace harness.

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

   (+)			(-)	Condition	Signal (Reference value)
   BCM
   Connector		Terminal
   Trunk room	M121	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 (trunk room). Refer to "TRUNK ROOM : REMOVAL AND INSTALLATION ".

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

Refer to "INTERMITTENT INCIDENT ".

INSPECTION END