Warning Buzzer does not Sound: Procedure

1. Check that the seat belt and key reminder buzzers sound.
   RESULT
   
   

   Result	Proceed to
   Seat belt warning buzzer does not sound (Driver side)	A
   Seat belt warning buzzer does not sound (Passenger side)	B
   Key reminder warning buzzer does not sound	C
   No warning buzzers sound	D

   HINT: 

   • Seat belt warning buzzer on: Ignition switch is ON, driver or front passenger seat belt is unfastened, and vehicle speed is 20 km/h (12.4 mph) or more.
   • Key reminder warning buzzer on: Ignition switch is OFF, key is in ignition key cylinder, and driver side door is open.

B → See step   5 

C → See step   8 

D → See step   9 

A: Go to next step 

1. Disconnect the L19 front seat inner belt assembly (driver side) connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 1: Identifying Front Seat Inner Belt Assembly (Driver Side) Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 (+) - 4 (E)	Tongue plate fastened	10 k Ω or higher
   3 (+) - 4 (E)	Tongue plate unfastened	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Front Seat Inner Belt Assembly (Driver Side))

3. Reconnect the front seat inner belt assembly (driver side) connector.

NG → See step   10 

OK: Go to next step 

1. Disconnect the E13 combination meter assembly connector.
2. Disconnect the L19 front seat inner belt assembly (driver side) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E13-8 (L) - L19-3 (+)	Always	Below 1 Ω

4. Reconnect the combination meter assembly connector.
5. Reconnect the front seat inner belt assembly (driver side) connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the L19 front seat inner belt assembly (driver side) connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying Front Seat Inner Belt Assembly Body Ground Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L19-4 (E) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Front Seat Inner Belt Assembly (Driver Side))

3. Reconnect the front seat inner belt assembly (driver side) connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   11 

1. Check if a CAN communication DTC is output.Refer to DIAGNOSIS SYSTEM
   RESULT
   
   

   Result	Proceed to
   CAN communication DTC is not output	A
   CAN communication DTC is output	B

B → See step   12 

A: Go to next step 

1. Check if a supplemental restraint DTC is output.Refer to DTC CHECK / CLEAR .
   RESULT
   
   

   Result	Proceed to
   Supplemental restraint DTC is not output	A
   Supplemental restraint DTC is output	B

B → See step   13 

A: Go to next step 

1. Check if a occupant classification DTC is output.Refer to DTC CHECK / CLEAR .
   RESULT
   
   

   Result	Proceed to
   Occupant classification DTC is not output	A
   Occupant classification DTC is output	B

B → See step   15 

A → See step   14