Horn Function Check

WARNING: This page is about a different car, the 2007 Nissan Versa. However, it is still accessible from the selected car via links, so may be relevant.

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

CHECK HORN OPERATION
Check if horn sounds with horn switch.

Does horn operate?

Yes >> GO TO 2.

No >> Check horn circuit. Refer to " HORN " .

CHECK IPDM E/R INPUT SIGNAL

Check voltage between IPDM E/R connector and ground.

CONNECTOR TERMINAL VOLTAGE SPECIFICATIONS

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

OK or NG

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

NG >> GO TO 3.

Fig 1: Checking IPDM E/R Input Signal

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.

CONNECTOR TERMINAL CONTINUITY SPECIFICATIONS

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

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

CONNECTOR TERMINAL CONTINUITY SPECIFICATIONS

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

Fig 2: Checking Horn Relay Circuit

OK or NG

OK >> Check condition of harness and connector.

NG >> Repair or replace harness.