HO
HO
HO
HO HORN
HORN
HORN
HORN
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Diagnosis
Diagnosis
Diagnosis
Diagnosis and
and
and
and Testing
Testing
Testing
Testing
Troubleshooting
Troubleshooting
Troubleshooting
Troubleshooting
3. Inferior tone quality of horn.
Step Operation
Yes
No
1 Is the vehicle equipped with any anti-theft system? Go to Step 2. Go to Step 3.
2 I s the vehicle diagnostic system check performed? Go to Step 4.
C heck vehicle
diagnostic system.
3 I s horn operation and other necessary inspection performed? Go to Step 2. Check horn harness.
4
P ress the horn button.
I s there any screak or buzz?
Go to Step 5. Check horn harness.
5
1. Check the horn for proper mounting torque.
2. Check if there is any fragment at the connecting part between horn and
vehicle.
Is any fault detected and elimilated?
Go to Step 9. Go to Step 6.
6
P erform procedures below for each horn:
1. Disconnect the horn connector.
2. Connect a jumper with a 15A fuse between the positive battery terminal
of horn and the control circuit of horn.
3. Connect aother jumper between the negative battery terminal of horn
and the grounding terminal of horn.
Is there any screak or buzz?
Go to Step 8. Go to Step 7.
7
Perform troubleshooting for the high impedence in the horn control circuit
or the horn ground circuit.
Is the maintenance finished?
Go to Step 9. —
8
Replace the horn.
Is the replacement finished?
Go to Step 9. —
9
O perate the horn.
Is the horn able to operate normally?
System is normal. Go to Step 1
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