SRS Warning Light does not Come ON: Procedure

1. Measure the voltage of the auxiliary battery.

   Standard Voltage

   11 to 14 V

NG → See step   6 

OK: Go to next step 

1. Turn the power switch off.
2. Disconnect the cable from the negative (-) auxiliary battery terminal.
   WARNING:

   Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

3. Check that the connector is properly connected to the combination meter assembly.

   OK

   The connector is properly connected.

   HINT: 

   If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

4. Disconnect the connector from the combination meter assembly.
5. Check that the terminal of the connector is not damaged.

   OK

   The terminal is not deformed or damaged.

NG → REPAIR OR REPLACE CONNECTOR 

OK: Go to next step 

1. Connect the cable to the negative (-) auxiliary battery terminal.
   Fig 1: Checking Wire Harness (Combination Meter Assembly - Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the power switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   L27-19 (IG+) - Body ground	Power switch on (IG)	11 to 14 V
   L27-18 (B) - Body ground	Power switch off	11 to 14 V

4. Turn the power switch off.
5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L27-30 (ES) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

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

NG → REPAIR OR REPLACE WIRE HARNESS 

OK: Go to next step 

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
   WARNING:

   Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

2. Connect the connector to the combination meter assembly.
3. Disconnect the connector from the airbag ECU assembly.
4. Connect the cable to the negative (-) auxiliary battery terminal.
5. Turn the power switch on (IG).
6. Check the SRS warning light condition.

   OK

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

   HINT: 

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

NG → See step   7 

OK → See step   5