SRS Warning Light does not Come ON [10/2014 - 05/2019]: Procedure

1. Measure the auxiliary battery voltage with the power switch off.

   Standard voltage

   11 to 14 V

   HINT: 

   It may be possible to tell whether the auxiliary battery is discharged by operating the horn.

   If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE OR RECHARGE AUXILIARY BATTERY 

Result: 

OK 

See step  2

1. Turn the power switch off.
2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
3. Check that the connector is properly connected to the combination meter assembly.

   Result

   Proceed to
   The connector is properly connected
   The connector is not properly connected

Result: 

The connector is not properly connected 

CONNECT CONNECTORS PROPERLY 

Result: 

The connector is properly connected 

See step  3

1. Disconnect the connector from the combination meter assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

2. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
3. Turn the power switch on (IG).
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   I10-21 (IG+) - Body ground	Power switch on (IG)	11 to 14 V
   I10-22 (B) - Body ground	Power switch off	11 to 14 V

5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I10-40 (EP) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Turn the power switch off.
2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 90 seconds.
3. Connect the connector to the combination meter assembly.
4. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
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 then remains on.

   HINT: 

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE AIRBAG ECU ASSEMBLY. Refer to  REMOVAL [10/2014 - 05/2019] 

Result: 

NG 

GO TO METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - ]