BCM (BODY CONTROL MODULE): Diagnosis Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSE AND FUSIBLE LINK

Check if the following BCM fuses or fusible link are blown.

FUSE AND FUSIBLE LINK REFERENCE

Terminal No.	Signal name	Fuse and fusible link No.
1	Battery power supply	H
11		10
24		7

Is the fuse or fusible link blown?

YES: Replace the blown fuse or fusible link after repairing the affected circuit.

NO: GO TO 2

CHECK POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect BCM.
Check voltage between BCM harness connector and ground.

TERMINALS VOLTAGE REFERENCE

Terminals			Voltage (Approx.)
(+)		(-)
BCM		Ground
Connector	Terminal
M16 (A)	1		Battery voltage
M17 (B)	11
M18 (C)	24

Fig 1: Checking Voltage Between BCM Harness Connector And Ground

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

Is the measurement normal?

YES: GO TO 3

NO: Repair or replace harness.

CHECK GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

TERMINALS CONTINUITY REFERENCE

BCM		Ground	Continuity
Connector	Terminal
M17	13		Yes

Fig 2: Checking Continuity Between BCM Harness Terminal 13 Connector And Ground

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

Does continuity exist?

YES: Inspection End.

NO: Repair or replace harness.