SRS Warning Light does not Come ON: Procedure

1. Measure the voltage of the battery.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   Battery	Always	11 to 14 V

NG → CHECK AND REPLACE BATTERY OR CHARGING SYSTEM 

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 assembly and the combination meter.

   OK

   The connectors are properly connected.

NG → CONNECT CONNECTORS PROPERLY 

OK: Go to next step 

1. Turn the ignition switch off.
   Fig 1: Measuring Voltage Of Combination Meter Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Disconnect the connectors from the combination meter and center airbag sensor 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. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   D1-1 (IG+) - D1-24 (ET)	Ignition switch ON	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.

   OK

   The SRS warning light turns off after the primary check period and comes on again after approximately 10 seconds.

   HINT: 

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

NG → See step   6 

OK → See step   5