Buzzer does not Sound [09/2022 - ]: Procedure

1. Read the Data List according to the display on the GTS.

   Body Electrical > Blind Spot Monitor Slave > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Buzzer Connection	Connection status of the buzzer	Valid or Invalid	Valid: Connection Invalid: No connection	-
   Slave Side RCTA Function	Switches the RCTA function on and off	OFF or ON	OFF: RCTA function off ON: RCTA function on	-

   Body Electrical > Blind Spot Monitor Slave > Data List 

   Tester Display
   Buzzer Connection
   Slave Side RCTA Function

   Result

   Result	Proceed to
   "Valid" and "ON" is displayed for all items.	A
   "Invalid" or "OFF" is displayed.	B

Result: 

B 

REPLACE BLIND SPOT MONITOR SENSOR RH. Refer to  REMOVAL [09/2022 - ] 

Result: 

A 

See step  2

1. According to the display on the GTS, check for DTCs.

   Body Electrical > Blind Spot Monitor Slave > Clear DTCs 

2. According to the display on the GTS, check for DTCs.

   Body Electrical > Blind Spot Monitor Slave > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO BLIND SPOT MONITOR SYSTEM 

For Gasoline Model: Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2022 - ]

For HV Model: Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2022 - ]

Result: 

OK 

See step  3

1. Disconnect the RCTA buzzer (blind spot monitor buzzer) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to RCTA Buzzer (Blind Spot Monitor Buzzer))
   *b	Front view of wire harness connector (to Blind Spot Monitor Sensor LH (A))

2. Disconnect the blind spot monitor sensor LH (A) connector.
3. 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	Ignition switch ON	11 to 14 V
   N28-2 (BZN) or R5-3 (BUZ) - Body ground	Ignition switch ON	Below 1 V
   N28-2 (BZN) - N28-1 (BZP)	Ignition switch ON	Below 1 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Disconnect the N28 RCTA buzzer (blind spot monitor buzzer) connector.
2. Disconnect the R5 blind spot monitor sensor LH (A) connector.
3. 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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE RCTA BUZZER (BLIND SPOT MONITOR BUZZER). Refer to  REMOVAL [09/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR