Lexus ES: Buzzer does not Sound
WIRING DIAGRAM
.png)
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 |
|
.gif)
| 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 |
READ NEXT:
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:
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Front Camera System DTC No. Detection Item Link C10001C Control Module Internal Temperature Sensor "A" Circuit Circuit Voltage Out of Range C10051C Control Module Internal Temperature Sensor "B" Circuit Circuit Voltage Out of Range C100A
Thermostat Heater Control Circuit Short to Battery (P059712)
DESCRIPTION An electric heater is equipped to the temperature sensing portion of the thermostat. During normal driving, current does not flow to the heater and the thermostat functions as an ordinary thermostat. When the temperature of the engine increases by a large amount such as during high-load
