Diagnosis Procedure
- INSPECTION START
Perform inspection in accordance with procedure that confirms malfunction.
Which procedure confirms malfunction?
Component Function Check 1
GO TO 2.
Component Function Check 2
GO TO 4.
- CHECK HORN FUNCTION
Check horn function using horn switch.
Do the horn sound?
YES
GO TO 3.
NO
Check horn circuit. Refer to Wiring Diagram .
- CHECK HORN CONTROL CIRCUIT 1
- Disconnect horn relay.
- Disconnect IPDM E/R connector.
- Check continuity between IPDM E/R harness connector and horn relay harness connector.
IPDM E/R
Horn relay
Continuity
Connector
Terminal
Connector
Terminal
E6
44
E11
1
Existed
- Check continuity between IPDM E/R harness connector and ground.
IPDM E/R
Ground
Continuity
Connector
Terminal
E6
44
Not existed
Is the inspection result normal?
YES
Replace IPDM E/R. Refer to Removal and Installation .
NO
Repair or replace harness.
- CHECK VEHICLE SECURITY HORN RELAY POWER SUPPLY
- Disconnect vehicle security horn relay.
- Check voltage between vehicle security horn relay harness connector and ground.
(+)
(-)
Voltage (V)
(Approx.)
Vehicle security horn relay
Connector
Terminal
E18
1
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 5.
NO
Repair or replace harness.
- CHECK HORN CONTROL CIRCUIT 2
- Disconnect IPDM E/R connector.
- Check continuity between IPDM E/R harness connector and vehicle security horn relay harness connector.
IPDM E/R
Theft warning horn relay
Continuity
Connector
Terminal
Connector
Terminal
E6
45
E18
3
Existed
- Check continuity between IPDM E/R harness connector and ground.
IPDM E/R
Ground
Continuity
Connector
Terminal
E6
45
Not existed
Is the inspection result normal?
YES
Replace IPDM E/R. Refer to Removal and Installation .
NO
Repair or replace harness.