SRS Warning Light Remains ON: Procedure

1. Check if a CAN communication DTC is output.
   RESULT
   
   

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

A → See step   9 

B: Go to next step 

1. Measure the voltage of the battery.

   Standard voltage

   11 to 14 V

NG → REPLACE OR RECHARGE BATTERY 

OK: Go to next step 

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 center airbag sensor and combination meter.

   OK

   The connectors are properly connected.

NG → CONNECT CONNECTORS PROPERLY 

OK: Go to next step 

1. Disconnect the connectors from the center airbag sensor.
   Fig 1: Checking Source Voltage Of Center Airbag Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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
   C20-21 (IG2) - C20-25 (E1)	Ignition switch ON	11 to 14 V
   C20-21 (IG2) - C20-26 (E2)	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

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

NG → REPLACE INSTRUMENT PANEL WIRE 

OK: Go to next step 

1. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
   Fig 2: Checking Source Voltage Of Combination Meter

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the C50 connector from the combination meter.
3. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   C50-6 (IG+) - C50-7 (ET)	Ignition switch ON	11 to 14 V
   C50-5 (B) - C50-7 (ET)	Always	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

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.
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.
   NOTE:

   Make sure that nobody is in the vehicle.

   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.

NG → See step   8 

OK → See step   7