文档介绍：HORN – HORN SYSTEM HO–1
HORNBODY ELECTRICAL SYSTEM
PARTS LOCATION
STEERING PAD
(STEERING PAD SWITCH)
REPAIR
TOYOTA MAIN BODY ECU
LOW PITCHED HORN INSTRUMENT PANEL J/B
HIGH PITCHED HORN ENGINE ROOM R/B
ENGINE ROOM J/B
- HORN FUSE
- HORN RELAY
HO
B131106E01
HO–2 HORN – HORN SYSTEM
SYSTEM DIAGRAM
Main Body ECU
Instrument Panel J/B
HORN
11
ID HORN
25
HORN II5
FL MAIN 8 E18
Spiral HO
Cable
1 a1
Steering
Pad REPAIRL
Switch
Horn
11A4 A3 Switch
Horn Horn
(Low) (High)
B131104E01
TOYOTA
HO
HORN – HORN SYSTEM HO–3
PROBLEM SYMPTOMS TABLE
HORN SYSTEM
Symptom Suspected area See page
1. HORN fuse HO-3
2. Horn relay HO-3
Horn does not sound 3. Steering pad switch RS-347
4. Spiral cable RS-364
5. Wire harness -
1. Horn relay HO-3
Horn blows all the time 2. Steering pad switch RS-347
3. Wire harness -
Low pitched horn operates but high pitched horn does 1. High pitched horn HO-7
not operate 2. Wire harness -
High pitched horn operates but low pitched horn does 1. Low pitched horn HO-5
not operate 2. Wire harness -
REPAIR
TOYOTA
HO
HORN – HORN RELAY HO–3
HORN RELAY
INSPECTION
1. INSPECT FUSE (HORN)
(a) Check the resistance of the HORN fuse.
Standard:
Below 1 Ω
2. INSPECT HORN RELAY
(a) Remove the engine room R/B and J/B (horn relay).
(b) Measure the resistance accordin