Wireless Door Lock Buzzer Circuit

DESCRIPTION

The main body ECU RH activates the wireless door lock buzzer when detecting a lock/unlock signal from the door control transmitter.
This function only equipped for Australia and New Zealand models.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER

1. Connect the intelligent tester to the DLC3.

2. Turn the engine switch on (IG).

3. Turn the intelligent tester main switch on.

4. Select the Active test mode on the intelligent tester.

   Main Body (Main Body ECU RH): 

   Item (Display)	Tester Detail	Diagnostic Note
   Buzz Resp Sound	Wireless door lock buzzer ON/OFF	Buzzer (operation sound) can be heard

5. Check that the buzzer sounds/stops when turning the wireless door lock buzzer on/off by using intelligent tester.

   Result 

   Condition	Proceed to
   Buzzer sounds/stops	A
   Buzzer does not sound or sounds constantly	B

B	Go to step 2

A
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - WIRELESS DOOR LOCK BUZZER)

1. Disconnect the A36 main body ECU RH connector.

2. Measure the resistance according to the value(s) in the table below.

   Standard resistance:

   Symbol (Tester Connection)	Condition	Specified Condition
   BZR (A36-2) - A18-1	Always	Below 1 Ω
   BZR (A36-2) - Body ground	Always	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3. CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - COWL SIDE J/B RH - BODY GROUND)

1. Disconnect RD J/B connector.

2. Measure the resistance according to the value(s) in the table below.

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   A18-2 - RD-11	Always	Below 1 Ω
   A18-2 - Body ground	Always	10 kΩ or higher
   RD-7 - Body ground	Always	Below 1 Ω

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4. INSPECT WIRELESS DOOR LOCK BUZZER

1. Disconnect the A18 wireless door lock buzzer connector.

2. Measure the resistance according to the value(s) in the table below.

   HINT:

   The buzzer circuit is built into the ECU, not into the buzzer itself. When battery voltage is applied directly to the buzzer, the buzzer will not sound.

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   A18-1 - A18-2	Always	Approx. 1 kΩ

NG	REPLACE WIRELESS DOOR LOCK BUZZER

OK
REPLACE MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)