Nissan Pathfinder (2012 year). Instruction — part 427
HAC-138
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONER]
MANUAL AIR CONDITIONER SYSTEM
Discharge Air Flow
INFOID:0000000007356421
Switches And Their Control Function
INFOID:0000000007356422
SWITCHES AND THEIR CONTROL FUNCTION
Mode door position
Air outlet/distribution
Vent
Foot
Defroster
95%
5%
—
60%
40%
—
20%
55%
25%
15%
50%
35%
7%
15%
78%
Airflow always present at driver and passenger side demisters
WJIA1296E
AWIIA0271GB
August 2012
2012 Pathfinder
MANUAL AIR CONDITIONER SYSTEM
HAC-139
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONER]
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HAC
N
O
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WJIA1497E
August 2012
2012 Pathfinder
HAC-140
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONER]
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT Function (BCM - COMMON ITEM)
INFOID:0000000007808144
APPLICATION ITEM
CONSULT performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions.
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
E
cu
Id
en
tifi
ca
tio
n
Se
lf Di
ag
no
st
ic Re
su
lt
Da
ta
Mo
ni
tor
A
cti
ve
T
est
W
o
rk support
Co
nf
igu
rat
ion
CA
N Diag
Su
pp
ort Mn
tr
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
×
Intelligent Key system
INTELLIGENT KEY
×
Combination switch
COMB SW
×
BCM
BCM
×
×
×
×
×
Immobilizer
IMMU
×
×
×
Interior room lamp battery saver
BATTERY SAVER
×
×
×
Back door open
TRUNK
×
×
Vehicle security system
THEFT ALM
×
×
×
RAP system
RETAINED PWR
×
×
×
Signal buffer system
SIGNAL BUFFER
×
×
TPMS
AIR PRESSURE MONITOR
×
×
×
×
Panic alarm system
PANIC ALARM
×
August 2012
2012 Pathfinder
DIAGNOSIS SYSTEM (BCM)
HAC-141
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONER]
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AIR CONDITIONER
AIR CONDITIONER : CONSULT Function (BCM - AIR CONDITIONER)
INFOID:0000000007808145
DATA MONITOR
Monitor Item [Unit]
Description
IGN ON SW [On/Off]
Indicates condition of ignition switch ON position.
FAN ON SIG [On/Off]
Indicates condition of fan switch.
AIR COND SW [On/Off]
Indicates condition of A/C switch.
August 2012
2012 Pathfinder
HAC-142
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
MODE DOOR MOTOR
DTC/CIRCUIT DIAGNOSIS
MODE DOOR MOTOR
System Description
INFOID:0000000007356425
SYSTEM DESCRIPTION
Component Parts
Mode door control system components are:
• Front air control
• Mode door motor
• PBR (built into mode door motor)
• Intake sensor
System Operation
The mode door position (vent, B/L, foot, D/F, and defrost) is set by the front air control by means of the mode
door motor. When a mode door position is selected on the front air control, voltage is applied to one circuit of
the mode door motor while ground is applied to the other circuit, causing the mode door motor to rotate. The
direction of rotation is determined by which circuit has voltage applied to it, and which one has ground applied
to it. The front air control monitors the mode door position by measuring the voltage signal on the PBR circuit.
COMPONENT DESCRIPTION
Mode Door Motor
The mode door motor is attached to the heater and cooling unit
assembly. It rotates so that air is discharged from the outlet as indi-
cated by the front air control. Motor rotation is conveyed to a link
which activates the mode door.
Mode Door Motor (Front) Component Function Check
INFOID:0000000007356426
SYMPTOM:
• Air outlet does not change.
• Mode door motor does not operate normally.
WJIA1314E
WJIA1484E
August 2012
2012 Pathfinder
MODE DOOR MOTOR
HAC-143
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - DISCHARGE AIR
1. Turn blower control dial to 4.
2. Turn the mode dial and check all positions.
3. Confirm that discharge air comes out according to the air distribution table. Refer to
.
NOTE:
Confirm that the compressor clutch is engaged (visual inspection) and intake door position is at FRESH
when DEF (
) or D/F (
) is selected.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Go to diagnosis procedure. Refer to
HAC-143, "Mode Door Motor (Front) Diagnosis Procedure"
.
Mode Door Motor (Front) Diagnosis Procedure
INFOID:0000000007356427
Regarding Wiring Diagram information, refer to
HAC-172, "Wiring Diagram - Instruction"
.
1.
CHECK MODE DOOR MOTOR CIRCUITS FOR OPEN AND SHORT TO GROUND
1. Turn ignition switch OFF.
2. Disconnect the front air control harness connector M52 and the mode door motor harness connector
M144.
3. Check continuity between front air control harness connector M52 terminals 1, 14 and the mode door
motor harness connector M144 terminals 1, 6.
4. Check continuity between front air control harness connector M52 terminals 1, 14 and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace harness as necessary.
2.
CHECK FRONT AIR CONTROL FOR MODE DOOR MOTOR POWER AND GROUND
1. Reconnect front air control harness connector.
2. Turn ignition switch ON.
3. Rotate the mode switch to the D/F (
) mode.
4. Check voltage between front air control harness connector M52 terminal 1 and terminal 14 while rotating
the mode switch to the VENT (
), and then the B/L (
) mode.
Is the inspection result normal?
YES
>> GO TO 3.
Connector
Terminal
Connector
Terminal
Continuity
M52
1
M144
1
Yes
14
6
Connector
Terminal
—
Continuity
M52
1
Ground
No
14
Connector
Terminals
Condition Voltage
(Approx.)
(+) (-)
M52
1
14
While rotating the mode switch from
D/F (
) mode to VENT (
) mode
Battery voltage
14
1
While rotating the mode switch from
VENT (
) mode to B/L (
) mode
Battery voltage
August 2012
2012 Pathfinder
HAC-144
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
MODE DOOR MOTOR
NO
>> Replace front air control. Refer to
VTL-7, "Removal and Installation"
.
3.
CHECK MODE DOOR MOTOR PBR CIRCUITS FOR OPEN AND SHORT TO GROUND
1. Turn ignition switch OFF.
2. Disconnect the front air control harness connector M52.
3. Check continuity between front air control harness connector M52 terminals 23, 26 and the mode door
motor harness connector M144 terminals 2, 3.
4. Check continuity between front air control harness connector M52 terminals 23, 26 and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace harness as necessary.
4.
CHECK PBR FEEDBACK SIGNAL CIRCUIT FOR OPEN AND SHORT TO GROUND
1. Check continuity between front air control harness connector M52 terminal 21 and mode door motor har-
ness connector M144 terminal 4.
2. Check continuity between front air control harness connector M52 terminal 21 and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace harness as necessary.
5.
CHECK FRONT AIR CONTROL FOR 5 VOLT REFERENCE (VREF), VREF RETURN, AND FEEDBACK
SIGNAL
1. Reconnect front air control harness connectors.
2. Turn ignition switch ON.
3. Check voltage between front air control harness connector M52 terminal 23 and terminal 26.
4. Check voltage between front air control harness connector M52 terminal 21 and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace front air control. Refer to
VTL-7, "Removal and Installation"
.
Connector
Terminal
Connector
Terminal
Continuity
M52
23
M144
3
Yes
26
2
Connector
Terminal
—
Continuity
M52
23
Ground
No
26
Connector
Terminal
Connector
Terminal
Continuity
M52
21
M144
4
Yes
Connector
Terminal
—
Continuity
M52
21
Ground
No
Connector
Terminals
Connector
Terminals
Voltage (Approx.)
(+)
(-)
M52
23
M52
26
5V
Connector
Terminal
—
Voltage (Approx.)
M52
21
Ground
0V
August 2012
2012 Pathfinder
MODE DOOR MOTOR
HAC-145
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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6.
CHECK FRONT AIR CONTROL FOR FEEDBACK SIGNAL
1. Reconnect the mode door motor harness connector M144.
2. Check voltage between front air control harness connector M52 terminal 21 and ground.
Is the inspection result normal?
YES
>> Inspect mode door for binding or mechanical failure. If mode door moves freely, replace front air
control. Refer to
VTL-7, "Removal and Installation"
NO
>> Replace the mode door motor. Refer to
VTL-28, "Removal and Installation"
.
Connector
Terminal
—
Voltage (Approx.)
M52
21
Ground
0.2 to 4.8V
August 2012
2012 Pathfinder
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