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Home >> Lexus >> 2008 >> IS 250 AWD >> Repair and Diagnosis >> Electrical >> Horns >> Horn >> Horn System >> Problem Symptoms Table

Problem Symptoms Table

HORN SYSTEM 

PROBLEM SYMPTOMS REFERENCE AND HORN SYSTEM

Symptom Suspected area Reference
Horn does not sound 1. HORN fuse -
2. Horn relay HORN RELAY 
3. Steering pad switch INSPECTION
4. Spiral cable REMOVAL
5. Windshield wiper switch assembly WIPER AND WASHER SWITCH CIRCUIT
6. Power source control ECU -
7. Multiplex communication line DTC CHECK/CLEAR
8. Wire harness -
Horn blow all the time 1. Horn relay HORN RELAY 
2. Steering pad switch INSPECTION
3. Wire harness -
Low pitched horn operates but high pitched horn does not operate 1. High pitched horn HIGH PITCHED HORN 
2. Wire harness -
high pitched horn operates but low pitched horn does not operate 1. Low pitched horn LOW PITCHED HORN 
2. Wire harness -