Nissan Altima 2007-2012 Service Manual: Rear window defogger relay
Description
Power is supplied to the rear window defogger with BCM control.
Component Function Check
1. CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT
Check that an operation noise of rear window defogger relay [located in fuse block (J/B)] can be heard when turning the rear window defogger switch ON.
Is the inspection result normal? YES >> Rear window defogger relay power supply circuit is OK.
NO >> Refer to DEF-11, "Diagnosis Procedure".
Diagnosis Procedure
1. CHECK REAR WINDOW DEFOGGER RELAY GROUND CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between BCM connector and ground.
Is the inspection result normal? YES >> Rear window defogger power supply circuit is OK.
NO >> GO TO 2
2. CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect BCM and fuse block (J/B).
3. Check continuity between BCM connector (A) and fuse block (J/ B) connector (B).
Is the inspection result normal? YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK REAR WINDOW DEFOGGER RELAY
Check rear window defogger relay.
Refer to DEF-12, "Component Inspection".
Is the inspection result normal? YES >> GO TO 4
NO >> Replace rear window defogger relay.
4. CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Refer to GI-42, "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.
Component Inspection
1. CHECK REAR WINDOW DEFOGGER RELAY
Check rear window defogger relay.
Is the inspection result normal? YES >> Inspection End.
NO >> Replace rear window defogger relay.
Rear window defogger switch
Description
• The rear window defogger is operated by turning the rear window defogger
switch ON.
• Turns the indicator lamp in the rear window defogger switch ON when operating
the rear ...
Rear window defogger power supply
and ground circuit
Description
Heats the heating wire with the power supply from the rear window defogger
relay to prevent the rear window
from fogging up.
Component Function Check
1. CHECK REAR WINDOW DEFOGGER
...
Other materials:
Engine block heater (if so equipped)
Engine block heaters are used to assist with cold
temperature starting.
The engine block heater should be used when
the outside temperature is 20°F (-7°C) or lower.
WARNING
● Do not use your engine block heater
with an ungrounded electrical system or
a 2-pronged adapter. You can be ...
Passenger side
Description
Detects condition of the front power window motor RH operation and transmits
to power window and door
lock/unlock switch RH as pulse signal.
Component Function Check
1.CHECK ENCODER OPERATION
Does front door glass RH perform AUTO open/close operation normally when
operating powe ...
Tire equipment
1. SUMMER tires have a tread designed to
provide superior performance on dry pavement.
However, the performance of these
tires will be substantially reduced in snowy
and icy conditions. If you operate your vehicle
on snowy or icy roads, NISSAN recommends
the use of MUD & SNOW or ALL
SEA ...