Horn System: Inspection

WARNING: This page is about a different car, the 2004 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUSE (HORN)
1. Check the horn fuse resistance.
  Resistance: Below 1 Ω
  
  If the result is not as specified, replace the fuse.
  
  Fig 1: Inspecting Fuse (Horn)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT RELAY (HORN)

Remove the HORN relay from the engine room R/B.

Check the HORN relay resistance.

Standard:

TERMINAL CONNECTION SPECIFICATION

Tester Connection	Specified Condition
3 - 5	10 kΩ or higher
3 - 5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

If the result is not as specified, replace the relay.

Fig 2: Inspecting Relay (Horn)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT HIGH PITCHED HORN ASSY

Check operation of the horn.

MEASUREMENT SPECIFIED SPECIFICATION

Measurement Condition	Specified Operation
Battery positive (+) --> Terminal 1 Battery negative (-) --> Horn bracket	Horn sounds

If the result is not as specified, replace the horn assy.

Fig 3: Checking Operation Of Horn (High Pitched)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT LOW PITCHED HORN ASSY

Check operation of the horn.

MEASUREMENT SPECIFIED SPECIFICATION

Measurement Condition	Specified Operation
Battery positive (+) --> Terminal 1 Battery negative (-) --> Horn bracket	Horn sounds

If the result is not as specified, replace the horn assy.

Fig 4: Checking Operation Of Horn (Low Pitched)

If all the check results are as specified above and the wire harness is normal, replace the horn button switch (steering wheel pad) (see AIR BAG RESTRAINT SYSTEMS ).