Lexus ES: Buzzer does not Sound
WIRING DIAGRAM
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CAUTION / NOTICE / HINT
NOTICE:
- When checking for DTCs, make sure that the blind spot monitor system is turned on.
- Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
| 1. | CHECK DTC |
(a) Turn the power switch off.
(b) Turn the power switch on (IG).
(c) Recheck for DTCs and check if the same DTC is output again.
Body Electrical > Blind Spot Monitor Slave > Trouble CodesOK:
No DTCs are output.
| NG | .gif) | GO TO DTC CHART |
|
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| 2. | CHECK HARNESS AND CONNECTOR (RCTA BUZZER - BLIND SPOT MONITOR SENSOR LH) |
(a) Disconnect the N28 RCTA buzzer (blind spot monitor buzzer) connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Switch Condition | Specified Condition |
|---|---|---|
| N28-1 (BZP) - Body ground | Power switch on (IG) | 11 to 14 V |
| N28-2 (BZN) or R5-3 (BUZ) - Body ground | Below 1 V | |
| N28-2 (BZN) - N28-1 (BZP) | Below 1 V |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 3. | CHECK HARNESS AND CONNECTOR (RCTA BUZZER - BLIND SPOT MONITOR SENSOR LH AND AUXILIARY BATTERY) |
(a) Disconnect the N28 RCTA buzzer (blind spot monitor buzzer) connector.
(b) Disconnect the R5 blind spot monitor sensor LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| N28-2 (BZN) - R5-3 (BUZ) | Always | Below 1 Ω |
| N28-2 (BZN) or R5-3 (BUZ) - Body ground | Always | 10 kΩ or higher |
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Switch Condition | Specified Condition |
|---|---|---|
| N28-2 (BZN) or R5-3 (BUZ) - Body ground | Power switch on (IG) | Below 1 V |
| N28-1 (BZP) - Body ground | Power switch on (IG) | 11 to 14 V |
| N28-1 (BZP) - Body ground | Power switch off | Below 1 V |
| OK | | REPLACE BLIND SPOT MONITOR BUZZER |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Front Left Sensor Malfunction (C1AE1)
DESCRIPTION The front corner ultrasonic sensor LH is installed to the front bumper. The clearance warning ECU assembly detects obstacles based on signals received from the front corner ultrasonic sens
Front Left Center Sensor (C1AE2)
DESCRIPTION The front center ultrasonic sensor LH is installed to the front bumper. The clearance warning ECU assembly detects obstacles based on signals received from the front center ultrasonic sens
Front Right Center Sensor (C1AE3)
DESCRIPTION The front center ultrasonic sensor RH is installed to the front bumper. The clearance warning ECU assembly detects obstacles based on signals received from the front center ultrasonic sens
SEE MORE:
Reassembly
REASSEMBLY CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. INSTALL VISOR COVER ASSEMBLY Click here 2. INSTALL OUTER MIRROR UPPER COVER Click here 3. INSTALL OUTER MIRROR LOWER COVER Click here 4.
Components
COMPONENTS ILLUSTRATION *A for Driver Side *B for Front Passenger Side *1 COURTESY LIGHT ASSEMBLY *2 FRONT DOOR TRIM BOARD SUB-ASSEMBLY *3 MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WITH FRONT DOOR UPPER ARMREST BASE PANEL *4 NO. 2 DOOR TRIM PAD *5 POWER WINDOW REGU
