| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001N2HB |
| Model Year Start: 2021 | Model: Corolla | Prod Date Range: [04/2020 - 09/2022] |
| Title: PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM (for HV Model (w/o Safe Exit Assist Function)): Buzzer does not Sound; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022] | ||
|
Buzzer does not Sound |
WIRING DIAGRAM
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 Codes
OK:
No DTCs are output.
| NG |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (RCTA BUZZER - BLIND SPOT MONITOR SENSOR RH) |
(a) Disconnect the O143 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 |
|---|---|---|
|
O143-1 (BZP) - Body ground |
Power switch on (IG) |
11 to 14 V |
|
O143-2 (BZN) or O58-3 (BUZ) - Body ground |
Below 1 V |
|
|
O143-2 (BZN) - O143-1 (BZP) |
Below 1 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK HARNESS AND CONNECTOR (RCTA BUZZER - BLIND SPOT MONITOR SENSOR RH AND AUXILIARY BATTERY) |
(a) Disconnect the O143 RCTA buzzer (blind spot monitor buzzer) connector.
(b) Disconnect the O58 blind spot monitor sensor RH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O143-2 (BZN) - O58-3 (BUZ) |
Always |
Below 1 Ω |
|
O143-2 (BZN) or O58-3 (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 |
|---|---|---|
|
O143-2 (BZN) or O58-3 (BUZ) - Body ground |
Power switch on (IG) |
Below 1 V |
|
O143-1 (BZP) - Body ground |
Power switch on (IG) |
11 to 14 V |
|
O143-1 (BZP) - Body ground |
Power switch off |
Below 1 V |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|