Diagnosis Procedure

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 using horn switch.

Do the horn sound? 

YES: GO TO 3.

NO: Check horn circuit. Refer to "WIRING DIAGRAM ".

1. Disconnect horn relay.
2. Disconnect IPDM E/R connector.
3. Check continuity between IPDM E/R harness connector and horn relay harness connector.
   TERMINAL CONTINUITY REFERENCE CHART
   
   

   IPDM E/R		Horn relay		Continuity
   Connector	Terminal	Connector	Terminal
   E6	44	E11	1	Existed

4. Check continuity between IPDM E/R harness connector and ground.
   TERMINAL CONTINUITY REFERENCE CHART
   
   

   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.

1. Disconnect vehicle security horn relay.
2. Check voltage between vehicle security horn relay harness connector and ground.
   TERMINAL VOLTAGE REFERENCE CHART
   
   

   (+)		(-)	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.

1. Disconnect IPDM E/R connector.
2. Check continuity between IPDM E/R harness connector and vehicle security horn relay harness connector.
   TERMINAL CONTINUITY REFERENCE CHART
   
   

   IPDM E/R		Theft warning horn relay		Continuity
   Connector	Terminal	Connector	Terminal
   E6	45	E18	3	Existed

3. Check continuity between IPDM E/R harness connector and ground.
   TERMINAL CONTINUITY REFERENCE CHART
   
   

   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.