Check Intelligent Key Warning Buzzer

Check voltage between Intelligent Key unit connector and ground.

OK or NG 

OK: Intelligent Key warning buzzer is OK.

NG: GO TO 2.

Fig 1: Checking Voltage Between Intelligent Key Unit Connector Terminal 55 And Ground

1. Turn ignition switch OFF.
2. Disconnect Intelligent Key warning buzzer connector.
3. Check voltage between Intelligent Key warning buzzer connector and ground.
   TERMINAL VOLTAGE CHART
   
   

   Terminals			Voltage (V) (Approx.)
   (+)		(-)
   Intelligent Key warning buzzer connector	Terminal
   E37	3	Ground	Battery voltage

OK or NG 

OK: GO TO 3.

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

Fig 2: Checking Voltage Between Intelligent Key Warning Buzzer Connector Terminal 3 And Ground

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

   A		B		Continuity
   Intelligent Key unit connector	Terminal	Intelligent Key warning buzzer connector	Terminal
   M33	55	E37	1	Yes

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

   A		Ground	Continuity
   Intelligent Key unit connector	Terminal
   M33	55		No

   Fig 3: Checking Continuity Between Intelligent Key Unit Connector And Intelligent Key Warning Buzzer Connector

   

OK or NG 

OK: GO TO 4.

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 3, and check the operation.

1 (BAT-) - 3 (BAT+) : the buzzer sounds 

OK or NG 

OK: Intelligent Key warning buzzer is OK.

NG: Replace Intelligent Key warning buzzer.

Fig 4: Connecting Battery Power Supply To Intelligent Key Warning Buzzer Terminals 1 And 3