Horn Function Check

First perform the "SELF-DIAG RESULTS" in "BCM" with CONSULT-III, then perform the trouble diagnosis of malfunction system indicated "SELF-DIAG RESULTS" of "BCM". Refer to CAN COMMUNICATION INSPECTION USING CONSULT-III (SELF-DIAGNOSIS) .

1. CHECK HORN FUNCTION

   Does horn sound with horn switch?

   OK or NG 

   OK : GO TO 2.

   NG : Check horn circuit. Refer to HORN .

2. CHECK IPDM E/R INPUT SIGNAL

   Check voltage between IPDM E/R connector and ground.

   TERMINALS VOLTAGE REFERENCE
   
   

   Terminals			Voltage (V) (Approx).
   (+)		(-)
   IPDM E/R connector	Terminal
   E46	45	Ground	Battery voltage

   Fig 1: Checking Voltage Between IPDM E/R Connector E122 Terminal 45 And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.

   OK or NG 

   OK : Replace IPDM E/R. Refer to REMOVAL AND INSTALLATION OF IPDM E/R

   NG : GO TO 3.

3. CHECK HORN RELAY CIRCUIT
   1. Turn ignition switch OFF.
   2. Disconnect IPDM E/R and horn relay connector.
   3. Check continuity between IPDM E/R harness connector and horn relay harness connector.
      TERMINALS CONTINUITY REFERENCE
      
      

      A		B		Continuity
      IPDM E/R connector	Terminal	Horn relay connector	Terminal
      E46	45	H-1	1	Yes

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

      A		Ground	Continuity
      IPDM E/R connector	Terminal
      E46	45		No

      Fig 2: Checking Continuity Between IPDM E/R Connector And Horn Relay Harness Connector

      Courtesy of NISSAN MOTOR CO., U.S.A.

      OK or NG 

      OK : Check condition of harness and connector.

      NG : Repair or replace harness.