Intelligent Key Warning Buzzer(s) Check

1. Disconnect inoperative Intelligent Key warning buzzer connector.
2. Check voltage between Intelligent Key warning buzzer connector and ground.
   CONNECTOR TERMINAL VOLTAGE SPECIFICATIONS
   
   

   Terminals				Voltage (V) (Approx.)
   (+)			(-)
   Intelligent Key warning buzzer connector		Terminal
   Front door LH	D6	1	Ground	Battery voltage
   Trunk (sedan)	B32

OK or NG 

OK >> GO TO 2.

NG >> Repair or replace Intelligent Key warning buzzer power supply circuit.

Fig 1: Checking Intelligent Key Warning Buzzer Power Supply Circuit

1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit connector and inoperative Intelligent Key warning buzzer connector.
   CONNECTOR TERMINAL CONTINUITY SPECIFICATIONS
   
   

   A		B			Continuity
   Intelligent Key unit connector	Terminal	Intelligent Key warning buzzer connector		Terminal
   M52	4	Front door LH	D6	2	Yes
   		Trunk (sedan)	B32

3. Check continuity between Intelligent Key unit connector and ground.
   CONNECTOR TERMINAL CONTINUITY SPECIFICATIONS
   
   

   A		Ground	Continuity
   Intelligent Key unit connector	Terminal
   M52	4		No

   Fig 2: Checking Intelligent Key Warning Buzzer Circuit

   

OK or NG 

OK >> GO TO 3.

NG >> Repair or replace harness between Intelligent Key unit and Intelligent Key warning buzzer.

Connect battery power supply to Intelligent Key warning buzzer terminals 1 and 2, and check the operation.

1 (BAT+) - 2 (BAT-): the buzzer sounds 

OK or NG 

OK >> Intelligent Key warning buzzer is OK.

NG >> Replace inoperative Intelligent Key warning buzzer.

Fig 3: Checking Intelligent Key Warning Buzzer Operation