SRS Warning Light Remains ON [08/2015 - 08/2019]: Procedure

1. Check if a CAN communication DTC is output (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] ).
   RESULT
   
   

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

Result: 

B 

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] )

Result: 

A 

See step  2

1. Measure the voltage of the battery.

   Standard voltage

   11 to 14 V

Result: 

NG 

REPLACE OR RECHARGE BATTERY 

Result: 

OK 

See step  3

1. Turn the engine 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.

Result: 

NG 

CONNECT CONNECTORS PROPERLY 

Result: 

OK 

See step  4

1. Disconnect the G1 connector from the 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 engine switch on (IG).
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
   G1-21 (IG2) - G1-25 (E1)	Engine switch on (IG)	11 to 14 V
   G1-21 (IG2) - G1-26 (E2)	Engine switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

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

Result: 

NG 

REPLACE INSTRUMENT PANEL WIRE 

Result: 

OK 

See step  5

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the G3 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
   G3-27 (IG+) - G3-21 (E2)	Engine switch on (IG)	11 to 14 V
   G3-25 (B) - G3-21 (E2)	Always	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

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

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Turn the engine 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 engine switch on (IG).
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 engine switch is turned on (IG).

Result: 

OK 

REPLACE CENTER AIRBAG SENSOR ASSEMBLY 

(Refer to REMOVAL [08/2015 - ] )

Result: 

NG 

GO TO METER / GAUGE SYSTEM 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] )