SRS Warning Light Remains ON [12/2012 - ]: Procedure

1. Check if a CAN communication DTC is output.

   Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2012 - 10/2015] or HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] .

   Result	Proceed to
   	DTCs are output
   	DTC is not output

Result: 

DTCs are output 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2012 - 10/2015]  or  HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ]  . 

Result: 

DTC is not output 

See step  2

1. Measure the voltage of the battery.

   Standard voltage

   11 to 14 V

   Result	Proceed to
   	OK
   	NG

Result: 

NG 

REPLACE OR RECHARGE BATTERY 

Result: 

OK 

See step  3

1. Turn the ignition switch off.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Check that the connectors are properly connected to the airbag sensor assembly and combination meter assembly.

   Result	Proceed to
   	The connectors are properly connected
   	The connectors are not properly connected

Result: 

The connectors are not properly connected 

CONNECT CONNECTORS PROPERLY 

Result: 

The connectors are properly connected 

See step  4

1. Disconnect the connectors from the airbag sensor assembly.

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

2. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
3. Turn the ignition switch to ON.
4. Operate all the components of the electrical system (defogger, wipers, headlights, heater blower, etc.).
5. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   G92-21 (IG2) - Body ground	Ignition switch ON	11 to 14 V
   G92-21 (IG2) - Body ground	Ignition switch ON	11 to 14 V

6. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G92-25 (E1) - Body ground	Always	Below 1 Ω
   G92-26 (E2) - Body ground	Always	Below 1 Ω

   Result	Proceed to
   	OK
   	NG

Result: 

NG 

REPLACE HARNESS AND CONNECTOR 

Result: 

OK 

See step  5

1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

2. Disconnect the G16 connector from the combination meter assembly.
3. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
4. Turn the ignition switch to ON.
5. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   G16-39 (IG+) - Body ground	Ignition switch ON	11 to 14 V
   G16-40 (B) - Body ground	Always	11 to 14 V

6. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G16-21 (ET) - Body ground	Always	Below 1 Ω

   Result	Proceed to
   	OK
   	NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Turn the ignition switch off.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Connect the connector to the combination meter assembly.
4. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
5. Turn the ignition switch to ON.
6. Check the SRS warning light condition.

   OK

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

   HINT: 

   The primary check period is approximately 6 seconds after the ignition switch is turned to ON.

   Result	Proceed to
   	OK
   	NG

Result: 

OK 

REPLACE AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL [12/2012 - ]  . 

Result: 

NG 

GO TO METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2012 - ]  .