Diagnosis Procedure

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

   (+)			(-)	Condition	Signal (Reference value)
   BCM
   Connector		Terminal
   M122	Instrument center	78, 79	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 connector.
2. Check continuity between BCM harness connector and inside key antenna (instrument center) harness connector.
   CONTINUITY REFERENCE CHART
   
   

   BCM		Inside key antenna (instrument center)		Continuity
   Connector	Terminal	Connector	Terminal
   M122	78	M131	2	Existed
   	79		1

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

   BCM			Ground	Continuity
   Connector		Terminal
   M122	Instrument center	78		Not existed
   		79

   Is the inspection result normal? 

   YES: GO TO 3.

   NO: Repair or replace harness.

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

   (+)			(-)	Condition	Signal (Reference value)
   BCM
   Connector		Terminal
   M122	Instrument center	78, 79	Ground	Place Intelligent Key inside the vehicle.
   				Place Intelligent Key outside the vehicle.

   Is the inspection result normal? 

   YES: Replace inside key antenna (instrument center). Refer to "INSTRUMENT CENTER : REMOVAL AND INSTALLATION ".

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

Refer to "INTERMITTENT INCIDENT ".

INSPECTION END