DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
PERFORM ACTIVE TEST BY INTELLIGENT TESTER
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - WIRELESS DOOR LOCK BUZZER)
CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - COWL SIDE J/B RH - BODY GROUND)
INSPECT WIRELESS DOOR LOCK BUZZER
WIRELESS DOOR LOCK CONTROL SYSTEM - 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 |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the intelligent tester main switch on.
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 |
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 |
| A | |
| |
| PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE |
|
| 2.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - WIRELESS DOOR LOCK BUZZER) |
Disconnect the A36 main body ECU RH connector.
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 |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 3.CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - COWL SIDE J/B RH - BODY GROUND) |
Disconnect RD J/B connector.
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 |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 4.INSPECT WIRELESS DOOR LOCK BUZZER |
Disconnect the A18 wireless door lock buzzer connector.
Measure the resistance according to the value(s) in the table below.
- 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 |
| | REPLACE WIRELESS DOOR LOCK BUZZER |
|
|
| OK | |
| |
| REPLACE MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH) |
|
LEXUS IS250, IS220d / GSE20 ALE20
