Diagnosis Procedure
WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".
- CHECK HORN FUNCTION
Check horn function with horn switch.
Does the horn sound?
YES: GO TO 2
NO: Refer to "WIRING DIAGRAM ".
- CHECK HORN RELAY POWER SUPPLY
- Turn ignition switch ON.
- Perform "ACTIVE TEST", "HORN" with CONSULT.
- Using an oscilloscope or analog voltmeter, check voltage between IPDM E/R connector E122 terminal 45 and ground.
Courtesy of NISSAN NORTH AMERICA, INC.
IPDM E/R Ground Test item Voltage (V) (Approx.) Connector Terminal E122 45 Ground HORN OFF → ON → OFF Battery voltage → 0 → Battery voltage Other than above Battery voltage Is the inspection result normal?
YES: Refer to "INTERMITTENT INCIDENT ".
NO: GO TO 3
- CHECK HORN RELAY CIRCUIT
- Turn ignition switch OFF.
- Disconnect IPDM E/R and horn relay connector.
- Check continuity between IPDM E/R harness connector and horn relay harness connector.
Courtesy of NISSAN NORTH AMERICA, INC.
IPDM E/R Horn relay Continuity Connector Terminal Connector Terminal A: E122 45 B: H-1 1 Yes - Check continuity between IPDM E/R harness connector and ground.
IPDM E/R Ground Continuity Connector Terminal E122 45 Ground No Is the inspection result normal?
YES: GO TO 4
NO: Repair or replace harness.
- CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".
Is the inspection result normal?
YES: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION OF IPDM E/R ".
NO: Repair or replace the malfunctioning part.