Nissan Frontier. Manual — part 229
DEF-4
< SYSTEM DESCRIPTION >
REAR WINDOW DEFOGGER SYSTEM
SYSTEM DESCRIPTION
REAR WINDOW DEFOGGER SYSTEM
System Diagram
INFOID:0000000009479584
System Description
INFOID:0000000009479585
Operation Description
• When rear window defogger switch is turned ON while ignition switch is ON, the front air control transmits
rear window defogger switch signal to BCM.
• BCM transmits rear window defogger (if equipped) control signal to IPDM E/R via CAN communication when
rear window defogger (if equipped) operates.
• IPDM E/R turns rear window defogger relay (if equipped) and heated mirror relay (if equipped) ON when
rear window defogger switch signal is received.
• Rear window defogger (if equipped) and door mirror defogger (if equipped) are supplied with power and
operate when rear window defogger relay (if equipped) and heated mirror relay (if equipped) turn ON.
• Rear window defogger (if equipped) ON is displayed when signal is received.
Timer function
• BCM turns rear window defogger relay (if equipped) and heated mirror relay (if equipped) ON for approxi-
mately 15 minutes when rear window defogger switch is turned ON while ignition switch is ON. It makes rear
window defogger (if equipped) and door mirror defogger (if equipped) operate.
• Timer is canceled after pressing rear window defogger switch again during timer operation. Then BCM turns
rear window defogger relay (if equipped) and heated mirror relay (if equipped) OFF. The same reaction also
occurs during timer operation, if the ignition switch is turned OFF.
INPUT/OUTPUT SIGNAL CHART
ALLIA1369GB
Switch
Input signal to BCM
BCM function
Actuator
Rear window defogger switch
Defogger switch signal
Rear window defogger (if equipped)
& door mirror defogger (if equipped)
control
Rear window defogger(if
equipped)
Door mirror defogger (if
equipped)
Ignition switch
Ignition signal
REAR WINDOW DEFOGGER SYSTEM
DEF-5
< SYSTEM DESCRIPTION >
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Component Parts Location
INFOID:0000000009479586
Component Description
INFOID:0000000009479587
*:if equipped
ALLIA1229ZZ
1.
BCM M18, M19, M20 (view with lower
instrument panel LH removed)
2.
Rear window defogger connector
B165 (if equipped)
3.
Rear window defogger ground con-
nector B210 (if equipped)
4.
IPDM E/R (rear window defogger relay,
heated mirror relay) E120, E122, E124
5.
A. Rear window defogger switch
(with automatic A/C or manual A/C
type 1)
B. Rear window defogger switch
(with manual A/C type 2)
6.
Door mirror (door mirror defogger)
LH D4, RH D107 (if equipped)
BCM
• Operates the rear window defogger with the operation of rear window defogger switch.
• Performs the timer control of rear window defogger.
Rear window defogger relay*
• Operates the rear window defogger with the control signal from BCM.
Rear window defogger switch
• The rear window defogger switch is turned ON.
• Turns the indicator lamp ON when detecting the operation of rear window defogger.
Rear window defogger*
• Heats the heating wire with the power supply from the rear window defogger relay to prevent
the rear window from fogging up.
Heated mirror relay*
Operates the door mirror defogger with the control signal from IPDM E/R. Controlled simulta-
neously with the rear window defogger relay.
Door mirror defogger*
The heating elements heat up when powered by the heated mirror relay to defog the door mirrors
or prevent the door mirrors from fogging up.
DEF-6
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT Function (BCM - COMMON ITEM)
INFOID:0000000010226478
APPLICATION ITEM
CONSULT performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions.
REAR DEFOGGER
Direct Diagnostic Mode
Description
ECU Identification
The BCM part number is displayed.
Self Diagnostic Result
The BCM self diagnostic results are displayed.
Data Monitor
The BCM input/output data is displayed in real time.
Active Test
The BCM activates outputs to test components.
Work support
The settings for BCM functions can be changed.
Configuration
• The vehicle specification can be read and saved.
• The vehicle specification can be written when replacing BCM.
CAN Diag Support Mntr
The result of transmit/receive diagnosis of CAN communication is displayed.
System
Sub System
Direct Diagnostic Mode
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Co
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CA
N Diag
Su
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Door lock
DOOR LOCK
×
×
×
Rear window defogger
REAR DEFOGGER
×
×
Warning chime
BUZZER
×
×
Interior room lamp timer
INT LAMP
×
×
×
Remote keyless entry system
MULTI REMOTE ENT
×
×
×
Exterior lamp
HEAD LAMP
×
×
×
Wiper and washer
WIPER
×
×
×
Turn signal and hazard warning lamps FLASHER
×
×
Air conditioner
AIR CONDITIONER
×
Combination switch
COMB SW
×
BCM
BCM
×
×
×
×
×
Immobilizer
IMMU
×
×
×
Interior room lamp battery saver
BATTERY SAVER
×
×
×
Vehicle security system
THEFT ALM
×
×
×
RAP system
RETAINED PWR
×
×
×
Signal buffer system
SIGNAL BUFFER
×
×
TPMS
AIR PRESSURE MONITOR
×
×
×
×
Panic alarm system
PANIC ALARM
×
DIAGNOSIS SYSTEM (BCM)
DEF-7
< SYSTEM DESCRIPTION >
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REAR DEFOGGER : CONSULT Function (BCM - REAR DEFOGGER)
INFOID:0000000010226479
DATA MONITOR
ACTIVE TEST
Monitor Item [Unit]
Description
IGN ON SW [On/Off]
Indicates condition of ignition switch ON position.
ACC ON SW [On/Off]
Indicates condition of ignition switch ACC position.
REAR DEF SW [On/Off]
Indicates condition of rear window defogger switch.
Test Item
Description
REAR DEFOGGER
This test is able to check rear window defogger operation [Off/On].
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