Nissan Maxima. Instruction — part 305
DIAGNOSIS AND REPAIR WORKFLOW
DEF-5
< BASIC INSPECTION >
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The Diagnostic Procedure described is based on open circuit inspection. A short circuit inspection is also
required for the circuit check in the Diagnostic Procedure.
Is malfunctioning part detected?
YES
>> GO TO 8
NO
>> Check voltage of related BCM terminals using CONSULT.
8.
REPAIR OR REPLACE THE MALFUNCTIONING PART
1. Repair or replace the malfunctioning part.
2. Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replace-
ment.
3. Check DTC. If DTC is displayed, erase it.
>> GO TO 9
9.
FINAL CHECK
When DTC was detected in step 2, perform DTC Confirmation Procedure or Component Function Check
again, and then check that the malfunction has been repaired securely.
When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and check that
the symptom is not detected.
Does the symptom reappear?
YES (DTC is detected)>>GO TO 7
YES (Symptom remains)>>GO TO 6
NO
>> Inspection End.
DEF-6
< SYSTEM DESCRIPTION >
REAR WINDOW DEFOGGER SYSTEM
SYSTEM DESCRIPTION
REAR WINDOW DEFOGGER SYSTEM
System Diagram
INFOID:0000000010045573
System Description
INFOID:0000000010045574
Operation Description
• When rear window defogger switch is turned ON while ignition switch is ON, the A/C auto amp. (rear window
defogger switch) transmits rear window defogger switch signal to BCM.
• BCM turns rear window defogger relay ON when rear window defogger switch signal is received.
• Rear window defogger and door mirror defogger (with door mirror defogger) are supplied with power and
operate when rear window defogger relay turns ON.
• Rear window defogger ON is displayed when controller (A/C auto amp.) receives signals.
Timer function
• BCM turns rear window defogger relay ON for approximately 15 minutes when rear window defogger switch
is turned ON while ignition switch is ON. It makes rear window defogger and door mirror defogger (with door
mirror defogger) operate.
• Timer is canceled after pressing rear window defogger switch again during timer operation. Then BCM turns
rear window defogger relay OFF. The same reaction also occurs during timer operation, if the ignition switch
is turned OFF.
INPUT/OUTPUT SIGNAL CHART
*: With door mirror defogger
AWLIA2001GB
Switch
Input signal to BCM
BCM function
Actuator
Rear window defogger switch
Defogger switch signal
Rear window defogger and door
mirror defogger
*
control
Rear window defogger
Door mirror defogger
*
Push button ignition switch
Ignition signal
REAR WINDOW DEFOGGER SYSTEM
DEF-7
< SYSTEM DESCRIPTION >
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Component Parts Location
INFOID:0000000010045575
Component Description
INFOID:0000000010045576
*:
With heated mirrors
AWLIA2002ZZ
1.
BCM M16, M17, M18, M19 (view with
instrument panel removed)
2.
A. Fuse block (J/B)
B. Rear window defogger relay J-2
3.
A/C auto amp. (rear window defog-
ger switch) M37
4.
Door mirror (door mirror defogger) LH
D4, RH D107 (if equipped)
5.
A. Rear window defogger B53
B. Condenser B52 (view with rear pil-
lar finisher LH removed)
6.
Rear window defogger B54 (view
with rear pillar finisher RH removed)
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 and the door mirror defogger with the control signal from
BCM.
A/C auto amp. (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.
Door mirror defogger
*
• Heats the heating wire with the power supply from the rear window defogger relay to prevent
the door mirror from fogging up.
DEF-8
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT Function (BCM - COMMON ITEM)
INFOID:0000000010065030
APPLICATION ITEM
CONSULT performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions.
REAR WINDOW DEFOGGER
Direct Diagnostic Mode
Description
Ecu Identification
The BCM part number is displayed.
Self Diagnostic Result
Displays the diagnosis results judged by BCM.
Data Monitor
The BCM input/output signals are displayed.
Active Test
The signals used to activate each device are forcibly supplied from BCM.
Work support
Changes the setting for each system function.
Configuration
• Enables to read and save the vehicle specification.
• Enables to write the vehicle specification when replacing BCM.
CAN Diag Support Mntr
Monitors the reception status of CAN communication viewed from BCM.
System
Sub System
Direct Diagnostic Mode
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N Diag
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Door lock
DOOR LOCK
×
×
×
×
Rear window defogger
REAR DEFOGGER
×
×
Warning chime
BUZZER
×
×
Interior room lamp timer
INT LAMP
×
×
×
Exterior lamp
HEADLAMP
×
×
×
Wiper and washer
WIPER
×
×
×
Turn signal and hazard warning lamps FLASHER
×
×
×
Intelligent Key system
INTELLIGENT KEY
×
×
×
Combination switch
COMB SW
×
BCM
BCM
×
×
×
×
×
Immobilizer
IMMU
×
×
×
Interior room lamp battery saver
BATTERY SAVER
×
×
×
Trunk open
TRUNK
×
×
Vehicle security system
THEFT ALM
×
×
×
RAP system
RETAINED PWR
×
Signal buffer system
SIGNAL BUFFER
×
×
TPMS
AIR PRESSURE MONITOR
×
×
×
×
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