Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.

CHECK BATTERY
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
CHECK CONNECTION OF CONNECTORS
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 the combination meter.
  OK: The connectors are properly connected.
NG: CONNECT CONNECTORS

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (SOURCE VOLTAGE OF COMBINATION METER)

Turn the ignition switch off.
Disconnect the negative (-) terminal cable from the battery and wait for at least 90 seconds.
Disconnect the connectors from the combination meter and center airbag sensor assembly.
Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
Turn the ignition switch on.

Measure the voltage.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
D1-1 (IG2) - Body ground	Ignition switch on	11 to 14 V
D1-2 (ECUB) - Body ground	Always	11 to 14 V

Turn the ignition switch off.

Measure the resistance.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
D1-24 (ET) - Body ground	Always	Below 1 Ω

Fig 1: Checking Harness And Connector (Source Voltage Of Combination Meter)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP

CHECK SRS WARNING LIGHT
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.
4. Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
5. Turn the ignition switch on.
6. Check the SRS warning light condition.
  OK: The SRS warning light goes 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 on.
NG: GO TO METER / GAUGE SYSTEM (FOR SEDAN) or METER / GAUGE SYSTEM (FOR HATCHBACK)

OK: REPLACE CENTER AIRBAG SENSOR ASSEMBLY