Nissan Sentra 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
- Turn ignition switch ON.
- Check that an operation noise of rear window defogger relay (located in IPDM E/R) 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-32, "diagnosis procedure".
Diagnosis Procedure
Regarding wiring diagram information, refer to def-20, "wiring diagram".
1.Check fuses
Check if any of the following fuses in the ipdm e/r are blown.
Is the inspection result normal? Yes >> go to 2
No >> replace the fuse after repairing the affected circuit.
2. Check rear window defogger relay power supply circuit
- Turn ignition switch on.
- Check voltage between IPDM E/R connector E48 terminal 62 and ground.
Is the inspection result normal? Yes >> go to 3
No >> replace ipdm e/r. Refer to pcs-30, "removal and installation" (with intelligent key system) or pcs-58, "removal and installation" (without intelligent key system).
3. Check intermittent incident
Check intermittent incident.
Refer to gi-39, "intermittent incident" is the inspection result normal? Yes >> check the following:
- Battery power supply circuit.
- Ipdm e/r.
No >> repair or replace the malfunctioning parts.
Rear window defogger switch
Description
The rear window defogger is operated by pressing the rear window
defogger switch ON.
The indicator lamp in the rear window defogger switch illuminates while
the rear window def ...
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:
Heated seats (if so equipped)
The front seats are warmed by built-in heaters.
Start the engine.
Push the LO or HI position of the switch, as
desired. The indicator light in the switch will
illuminate.
The heater is controlled by a thermostat,
automatically turning the heater on and off.
The indicator light ...
Basic inspection
DIAGNOSIS AND REPAIR WORKFLOW
Work Flow
OVERALL SEQUENCE
DETAILED FLOW
1.INTERVIEW CUSTOMER
Interview the customer to obtain as much information as possible about the
conditions and environment under
which the malfunction occurred.
>> GO TO 2.
2.SYMPTOM CHECK
Verify symptoms.
...
P1078 EVT Control position sensor
DTC Logic
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1078
EXH TIM SEN/CIRC-B1
(Exhaust valve timing control
position sensor circuit
bank 1)
An excessively high or low voltage from
...
