SRS Warning Light Remains ON: Procedure

1. Check if a CAN communication DTC is output. Refer to DIAGNOSIS SYSTEM .

   Result

   Condition	Proceed To
   DTC is not output	A
   DTC is output	B

B → REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

A: Go to next step 

1. Measure the voltage of the battery.

   Standard voltage

   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 negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3. Check that the connectors are properly connected to the center airbag sensor assembly and combination meter assembly.

   OK

   The connectors are properly connected.

NG → CONNECT CONNECTORS PROPERLY 

OK: Go to next step 

1. Disconnect the connectors from the center airbag sensor assembly.
   Fig 1: Identifying Center Airbag Sensor Assembly Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
3. Turn the ignition switch on (IG).
4. Operate all components of the electrical system (defogger, wipers, headlight, heater blower, etc.).
5. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Condition	Specified Condition
   E30-21 (IG2) - Body ground	Ignition switch on (IG)	10 to 14 V

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

   Standard resistance

   Tester Connection	Condition	Specified Condition
   E30-25 (E1) - Body ground	Always	Below 1 Ω
   E30-26 (E2) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE WIRE HARNESS 

OK: Go to next step 

1. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
   Fig 2: Identifying Wire Harness Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the F1 connector from the combination meter assembly.
3. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
4. Turn the ignition switch on (IG).
5. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Condition	Specified Condition
   F1-1 (B) - Body ground	Always	10 to 14 V
   F1-2 (B2) - Body ground	Always	10 to 14 V
   F1-13 (IG+) - Body ground	Ignition switch on (IG)	10 to 14 V

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

   Standard resistance

   Tester Connection	Condition	Specified Condition
   F1-12 (E2) - Body ground	Always	Below 1 Ω
   F1-24 (ES) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE WIRE HARNESS 

OK: Go to next step 

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

   OK

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

   HINT: 

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

NG → See step   8 

OK → See step   7