Diagnostic Procedure

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

CHECK BCM CONNECTORS
1. Turn ignition switch OFF.
2. Disconnect BCM harness connectors M18 and M20.
3. Check terminals for damage or loose connections.
Inspection results OK?

OK: GO TO 2.

NG: Repair or replace damaged parts.

CHECK BCM POWER SUPPLY CIRCUIT (BAT)

Check voltage between BCM harness connector M20 terminal 70 and ground.

TERMINAL VOLTAGE CHART

Terminals			Voltage (Approx.)
(+)		(-)	Voltage (Approx.)
Connector	Terminal	Ground	Battery voltage
M20	70	Ground	Battery voltage

Fig 1: Checking Voltage Between BCM Connector M20 Terminal 70 And Ground

OK or NG

OK: GO TO 3.

NG: Check BCM power supply circuit for open or short.

CHECK BCM POWER SUPPLY CIRCUIT (IGN)

Turn ignition switch ON.

Check voltage between BCM harness connector M18 terminal 38 and ground.

TERMINAL VOLTAGE CHART

Terminals			Voltage (Approx.)
(+)		(-)	Voltage (Approx.)
Connector	Terminal	Ground	Battery voltage
M18	38	Ground	Battery voltage

Fig 2: Checking Voltage Between BCM Connector M18 Terminal 38 And Ground

OK or NG

OK: GO TO 4.

NG: Check BCM power supply circuit for open or short.

CHECK BCM GROUND CIRCUIT

Turn ignition switch OFF.

Check continuity between BCM harness connector M20 terminal 67 and ground.

TERMINAL CONTINUITY CHART

Terminals			Continuity
(+)		(-)
Connector	Terminal	Ground	Yes
M20	67	Ground	Yes

Fig 3: Checking Continuity Between BCM Connector M20 Terminal 67 And Ground

OK or NG

OK: Replace BCM. Refer to "BCM ".

NG: Repair BCM ground circuit.