Check Horn Switch

CAUTION: Before handling the airbag system components, refer to "CAUTION" of "General Description" in "AIRBAG SYSTEM". Ref. to AIRBAG SYSTEM>GENERAL DESCRIPTION>CAUTION .

CHECK HORN SWITCH TERMINAL .

Turn the ignition switch to OFF.
Disconnect the ground terminal from the battery sensor, and wait for at least 60 seconds before starting work. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
Remove the driver's airbag module. Ref. to AIRBAG SYSTEM>DRIVER'S AIRBAG MODULE>REMOVAL .
Check that the connection of the horn switch harness connector is correct.

Measure the resistance between connectors.

Courtesy of SUBARU OF AMERICA, INC.

Terminal No.	Standard
Horn switch terminal - ground terminal	Less than 1 Ω

Is the measured value within the standard value?

Yes: Go to 2 .

No: It is possible that there is an open circuit between horn switch terminal and ground terminal. Replace the satellite switch assembly.

CHECK DRIVER'S AIRBAG MODULE .

Measure the resistance between horn plate and snap pin hook.

Courtesy of SUBARU OF AMERICA, INC.

Terminal No.	Standard
Horn plate - Snap pin hook	1 MΩ or more

Is the measured value within the standard value?

Yes: Go to 3 .

No: Replace the driver's airbag module.

CHECK DRIVER'S AIRBAG MODULE .

Measure the resistance between horn plate and snap pin hook with the snap pin hook pressed-in firmly.

Courtesy of SUBARU OF AMERICA, INC.

Terminal No.	Standard
Horn plate - Snap pin hook	Less than 1 Ω

Is the measured value within the standard value?

Yes: Driver's airbag module is normal.

No: Replace the driver's airbag module.