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   5 

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 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 terminals of the connectors are not damaged.

   OK

   The terminals are not deformed or damaged.

NG → REPLACE WIRE HARNESS 

OK: Go to next step 

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

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   E1-1 (IG+) - Body ground	Ignition switch ON	11 to 14 V
   E1-21 (B) - Body ground	Always	11 to 14 V
   E1-22 (B2) - Body ground	Always	11 to 14 V

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E1-20 (ES) - Body ground	Always	Below 1 Ω
   E1-40 (E2) - Body ground	Always	Below 1 Ω

NG → REPLACE WIRE HARNESS 

OK: Go to next step 

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

   OK

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

   HINT: 

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

NG → See step   7 

OK → See step   6