HORN

1. Select “HORN” in “ACTIVE TEST” mode with CONSULT-III.
2. Check the horn (high/low) operation.

Test item		Description
HORN	ON	Horn relay	ON (for 20 ms)

YES>>Horn function is OK.

NO>>Go to Diagnosis Procedure.

Check horn function with horn switch.

YES>>GO TO 2.

NO>>Refer to Wiring Diagram - HORN -.

1. Turn ignition switch ON.
2. Perform “ACTIVE TEST” (“HORN”) with CONSULT-Ill.
3. Check voltage between horn relay 1 connector and ground.
   

   Horn relay 1		Ground	Test item		Voltage (V) (Approx.)
   Connector	Terminal
   E11	1		HORN	ON	Battery voltage → 0 → Battery voltage
   				Other than above	Battery voltage

   
   

YES>>GO TO 6.

NO>>GO TO 4.

1. Turn ignition switch OFF.
2. Disconnect horn relay 1 connector and diode connector.
3. Check continuity between horn relay 1 harness connector and diode harness connector.
   

   Horn relay 1		Diode		Continuity
   Connector	Terminal	Connector	Terminal
   E11	1	E107	3	Existed

   
   
4. Check continuity between horn relay 1 harness connector and ground.
   

   Horn relay 1		Ground	Continuity
   Connector	Terminal
   E11	1		Not existed

   
   

YES>>GO TO 4.

NO>>Repair or replace harness.

1. Disconnect IPDM E/R connector.
2. Check continuity between IPDM E/R harness connector and diode connector.
   

   IPDM E/R		Diode		Continuity
   Connector	Terminal	Connector	Terminal
   E6	44	E107	2	Existed

   
   
3. Check continuity between IPDM E/R harness connector and ground.
   

   IPDM E/R		Ground	Continuity
   Connector	Terminal
   E6	44		Not existed

   
   

YES>>GO TO 5.

NO>>Repair or replace harness.

Refer to Component Inspection.

YES>>GO TO 6.

NO>>Replace diode.

Refer to Intermittent Incident.

>>INSPECTION END

1. Turn ignition switch OFF.
2. Disconnect diode.
3. Check the continuity between diode terminals under the following conditions..

*: For a digital tester.

Terminal		Continuity
(+)*	(-)*
3	2	Existed
2	3	Not existed

YES>>INSPECTION END

NO>>Replace diode.