Diagnosis Procedure

Check horn function with horn switch.

Do the horn sound? 

YES: Go to 2.

NO: Refer to "WIRING DIAGRAM - HORN - ".

1. Disconnect IPDM E/R connector.
2. Check voltage between IPDM E/R harness connector and ground.
   TERMINAL VOLTAGE REFERENCE CHART
   
   

   (+)		(-)	Voltage (V) (Approx.)
   IPDM E/R
   Connector	Terminal
   E13	34	Ground	Battery voltage

   Is the inspection result normal? 

   YES: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION ".

   NO: Go to 3.

1. Disconnect horn relay connector.
2. 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
   E13	34	E5	1	Existed

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

   IPDM E/R		Ground	Continuity
   Connector	Terminal
   E13	34		Not existed

   Is the inspection result normal? 

   YES: Go to 4.

   NO: Repair or replace harness.

INSPECTION END