Toyota Sienna Service Manual: SRS Warning Light does not Come ON

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

1 CHECK BATTERY

1. Measure the voltage of the battery.

Standard voltage: 11 to 14 V

2 CHECK CONNECTORS

1. Turn the ignition switch to the LOCK position.
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 assembly.

OK: The connectors are properly connected.

3 CHECK WIRE HARNESS (SOURCE VOLTAGE OF COMBINATION METER ASSEMBLY)

1. Turn the ignition switch to the LOCK position.
2.  Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3.  Disconnect the connector from 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 to the ON position.
6.  Measure the voltage according to the value(s) in the table below.

Standard voltage

7. Turn the ignition switch to the LOCK position.
8.  Measure the resistance according to the value(s) in the table below.

Standard Resistance

4 CHECK SRS WARNING LIGHT

1. Turn the ignition switch to the LOCK position.
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.  Disconnect the connector from the center airbag sensor assembly.
5.  Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
6.  Turn the ignition switch to the ON position.
7.  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 is approximately 6 seconds after the ignition switch is turned to the ON position.

REPLACE CENTER AIRBAG SENSOR ASSEMBLY