SRS Warning Light Remains ON [08/2013 - 12/2013]: Procedure

1. Check the SRS warning light operation approximately 6 seconds after the power switch is turned on (IG).

   Result

   SRS Warning Light Illumination	Proceed to
   Remains on	A
   Goes off and then comes on again	B

B → See step   6 

A: Go to next step 

1. Measure the voltage of the auxiliary battery.

   Standard Voltage

   11 to 14 V

NG → See step   14 

OK: Go to next step 

1. Turn the power switch off.
2. Disconnect the cable from the negative (-) auxiliary battery terminal.
   WARNING:

   Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

3. Check that the connector is properly connected to the airbag sensor assembly.

   OK

   The connector is properly connected.

   HINT: 

   If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

4. Disconnect the connector from the airbag sensor assembly.
5. Check that the terminal of the connector is not damaged.

   OK

   The terminal is not deformed or damaged.

NG → REPLACE WIRE HARNESS 

OK: Go to next step 

1. Connect the cable to the negative (-) auxiliary battery terminal.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Turn the power switch on (IG).
3. Operate all components of the electrical system (defogger, wipers, headlights, heater blower, etc.).
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   I47-21 (IG2) - Body ground	Power switch on (IG)	8 to 16 V

5. Turn the power switch off.
6. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I47-25 (E1) - Body ground	Always	Below 1 Ω
   I47-26 (E2) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Airbag Sensor Assembly)

NG → REPLACE WIRE HARNESS 

OK: Go to next step 

1. Turn the power switch on (IG).
2. Check the SRS warning light condition.

   OK

   After the primary check period, the SRS warning light goes off for approximately 10 seconds and turns back on.

   HINT: 

   The primary check period is approximately 6 seconds after the power switch is turned on (IG).

NG → See step   15 

OK → See step   13 

1. Use the Techstream to check if the CAN communication system is functioning normally.

   HINT: 

   • Refer to Bus Check for the CAN communication system. Refer to DIAGNOSIS SYSTEM [08/2013 - 12/2013] .
   • The airbag sensor assembly is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.

   Result

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

B → See step   16 

A: Go to next step 

1. Measure the voltage of the auxiliary battery.

   Standard Voltage

   11 to 14 V

NG → See step   14 

OK: Go to next step 

1. Turn the power switch off.
2. Disconnect the cable from the negative (-) auxiliary battery terminal.
   WARNING:

   Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

3. Check that the connector is properly connected to the airbag sensor assembly.

   OK

   The connector is properly connected.

   HINT: 

   If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

4. Disconnect the connector from the airbag sensor assembly.
5. Check that the terminal of the connector is not damaged.

   OK

   The terminal is not deformed or damaged.

NG → REPLACE WIRE HARNESS 

OK: Go to next step 

1. Connect the cable to the negative (-) auxiliary battery terminal.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Turn the power switch on (IG).
3. Operate all components of the electrical system (defogger, wipers, headlights, heater blower, etc.).
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   I47-21 (IG2) - Body ground	Power switch on (IG)	8 to 16 V

5. Turn the power switch off.
6. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I47-25 (E1) - Body ground	Always	Below 1 Ω
   I47-26 (E2) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Airbag Sensor Assembly)

NG → REPLACE WIRE HARNESS 

OK: Go to next step 

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
   WARNING:

   Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

2. Check that the connector is properly connected to the combination meter assembly.

   OK

   The connector is properly connected.

   HINT: 

   If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

3. Disconnect the connector from the combination meter assembly.
4. Check that the terminal of the connector is not damaged.

   OK

   The terminal is not deformed or damaged.

NG → REPAIR OR REPLACE CONNECTOR 

OK: Go to next step 

1. Connect the cable to the negative (-) auxiliary battery terminal.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Turn the power switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   I18-13 (IG+) - Body ground	Power switch on (IG)	11 to 14 V
   I18-1 (B) - Body ground	Power switch off	11 to 14 V

4. Turn the power switch off.
5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I18-7 (ES) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Combination Meter Assembly)

NG → REPAIR OR REPLACE WIRE HARNESS 

OK: Go to next step 

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
   WARNING:

   Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

2. Connect the connector to the combination meter assembly.
3. Connect the cable to the negative (-) auxiliary battery terminal.
4. Turn the power switch on (IG).
5. Check the SRS warning light condition.

   OK

   After the primary check period, the SRS warning light goes off for approximately 10 seconds and turns back on.

   HINT: 

   The primary check period is approximately 6 seconds after the power switch is turned on (IG).

NG → See step   15 

OK → See step   13