Horn System: Inspection

INSPECT HIGH PITCHED HORN ASSY

Check operation of the horn.

Fig 1: Checking High Pitched Horn Assy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HIGH PITCHED HORN MEASUREMENT SPECIFIED CONDITION CHART

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

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

INSPECT LOW PITCHED HORN ASSY

Check operation of the horn.

Fig 2: Checking Low Pitched Horn Assy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

LOW PITCHED HORN MEASUREMENT SPECIFIED CONDITION CHART

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

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

INSPECT HORN RELAY ASSY

Inspect the horn relay (Marking: HORN) resistance.

Fig 3: Checking Horn Relay Resistance

HORN RELAY TERMINAL SPECIFIED CONDITION CHART

Tester connection	Condition	Specified condition
3 - 5	Always	10 kΩ or higher
3 - 5	Apply B+ between terminals 1 and 2	Below 1 Ω

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