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 KEY SLOT POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect key slot connector.
Check voltage between key slot connector and ground.

VOLTAGE SPECIFICATION

Terminals			Voltage (V) (Approx.)
(+)		(-)
Key slot connector	Terminal	(-)
M40	1	Ground	Battery voltage
M40	5	Ground	Battery voltage

Fig 1: Checking Voltage Between Key Slot Connector And Ground

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

Is the inspection result normal?

YES: GO TO 2

NO: Repair or replace key slot power supply circuit.

CHECK KEY SLOT GROUND CIRCUIT

Check continuity between key slot connector and ground.

CONTINUITY CHART

Key slot connector	Terminal	Ground	Continuity
M40	7	Ground	Yes

Fig 2: Checking Continuity Between Key Slot Connector And Ground

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

Is the inspection result normal?

YES: GO TO 3

NO: Repair or replace key slot ground circuit.

CHECK KEY SLOT CIRCUIT

Disconnect BCM connector.

Check continuity between BCM connector and key slot connector.

CONTINUITY CHART

BCM connector	Terminal	Key slot connector	Terminal	Continuity
A: M18	29	C: M40	11	Yes
B: M19	68		2
B: M19	69		3

Check continuity between BCM connector and ground.

CONTINUITY CHART

BCM connector	Terminal		Continuity
A: M18	29	Ground	No
B: M19	68
B: M19	69

Fig 3: Checking Continuity Between BCM Connector And Ground

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

Is the inspection result normal?

YES: GO TO 4

NO: Repair or replace harness between BCM and key slot.

CHECK KEY SLOT
Refer to "COMPONENT INSPECTION ".

Is the inspection result normal?

YES: GO TO 5

NO: Replace key slot.
CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".

Inspection End.