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 POWER SUPPLY CIRCUIT

Turn ignition switch ON.

Check voltage between rear window defogger connector and ground.

TERMINAL VOLTAGE REFERENCE CHART

Terminals			Condition of rear window defogger switch	Voltage (V) (Approx.)
(+)		(-)
Rear window defogger connector	Terminal
B53	1	Ground	ON	Battery voltage
			OFF	0

Fig 1: Checking Voltage Between Rear Window Defogger Connector And Ground

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

Is the inspection result normal?

YES: GO TO 2

NO: GO TO 3

CHECK GROUND CIRCUIT

Turn ignition switch OFF.
Disconnect rear window defogger.

Check continuity between rear window defogger connector and ground.

TERMINAL CONTINUITY REFERENCE CHART

Rear window defogger connector	Terminal	Ground	Continuity
B54	2	Ground	Yes

Fig 2: Checking Continuity Between Rear Window Defogger Connector And Ground

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

Is the inspection result normal?

YES: GO TO 5

NO: Repair or replace harness.

CHECK HARNESS CONTINUITY 1

Turn ignition switch OFF.
Disconnect condenser and rear window defogger.
Check continuity between condenser connector (A) and rear window defogger connector (B).

TERMINAL CONTINUITY REFERENCE CHART

Condenser connector	Terminal	Rear window defogger connector	Terminal	Continuity
B52 (A)	1	B53 (B)	1	Yes

Fig 3: Checking Continuity Between Condenser Connector And Rear Window Defogger Connector

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

Is the inspection result normal?

YES: GO TO 4

NO: Replace condenser. Refer to "REMOVAL AND INSTALLATION ".

CHECK HARNESS CONTINUITY 2

Disconnect fuse block (J/B).

Check continuity between fuse block (J/B) connector (A) and condenser connector (B).

TERMINAL CONTINUITY REFERENCE CHART

Fuse block (J/B) connector	Terminal	Condenser connector	Terminal	Continuity
B4 (A)	10T	B52 (B)	1	Yes
B4 (A)	11T	B52 (B)	1	Yes

Fig 4: Checking Continuity Between Fuse Block (J/B) Connector And Condenser Connector

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

Is the inspection result normal?

YES: GO TO 6

NO: Replace or repair harness.

CHECK FILAMENT
Check filament.

Refer to "COMPONENT INSPECTION ".

Is the inspection result normal?

YES: Refer to "INTERMITTENT INCIDENT ".

NO: Repair filament. Refer to "INSPECTION AND REPAIR ".
CHECK INTERMITTENT INCIDENT
Check intermittent incident.

Refer to "INTERMITTENT INCIDENT ".

Is the inspection result normal?

YES: Check the following.
- Battery power supply circuit.
- Fuse block (J/B).
NO: Repair or replace the malfunctioning parts.