Nissan Pathfinder (2012 year). Instruction — part 413
HAC-26
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
MODE DOOR MOTOR
DTC/CIRCUIT DIAGNOSIS
MODE DOOR MOTOR
System Description
INFOID:0000000007356351
SYSTEM DESCRIPTION
Component Parts
Mode door control system components are:
• A/C auto amp.
• A/C and AV switch assembly
• Mode door motor (front)
• PBR (built into mode door motor)
• In-vehicle sensor
• Ambient sensor
• Optical sensor
• Intake sensor
System Operation
The mode door position (vent, B/L, foot, D/F, and defrost) is set by the A/C auto amp. by means of the mode
door motor (front). When a mode door position is selected on the A/C auto amp., voltage is applied to one cir-
cuit of the mode door motor (front) while ground is applied to the other circuit, causing the mode door motor
(front) 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 A/C auto amp. monitors the mode door position by measuring the voltage signal
on the PBR circuit.
In AUTO mode the mode door position is set by the A/C auto amp. which determines the proper position
based on inputs from the in-vehicle sensor, ambient sensor, optical sensor, intake sensor, and the temperature
selected by the driver or passenger.
Mode Door Control Specification
COMPONENT DESCRIPTION
Mode Door Motor (Front)
AWIIA0092GB
AWIIA0093GB
August 2012
2012 Pathfinder
MODE DOOR MOTOR
HAC-27
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
The mode door motor (front) is attached to the heater & cooling unit
assembly. It rotates so that air is discharged from the outlet as indi-
cated by the A/C auto amp. Motor rotation is conveyed to a link
which activates the mode door.
Mode Door Motor (Front) Component Function Check
INFOID:0000000007356352
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - DISCHARGE AIR
1. Press mode switch four times and then press the
(DEF) switch. Each position indicator should change
shape (on display).
2. 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 FOOT (
), DEF (
) or D/F (
) is selected.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Go to diagnosis procedure. Refer to
HAC-27, "Mode Door Motor (Front) Diagnosis Procedure"
.
Mode Door Motor (Front) Diagnosis Procedure
INFOID:0000000007356353
Regarding Wiring Diagram information, refer to
HAC-95, "Wiring Diagram - Automatic"
SYMPTOM:
• Air outlet does not change.
• Mode door motor does not operate normally.
1.
CHECK MODE DOOR MOTOR POSITION BALANCED RESISTOR (PBR) FEEDBACK VOLTAGE
1. Turn ignition switch ON.
2. Using CONSULT, check "MODE FDBCK" in "DATA MONITOR" mode in "HVAC". Refer to
.
3. Observe "MODE FDBCK" voltage while cycling A/C auto amp. mode switch through all modes.
Is the inspection result normal?
YES
>> • Mode door motor is OK.
• Inspect mode door for mechanical failure. Refer to
VTL-28, "Removal and Installation"
NO
>> GO TO 2.
2.
CHECK MODE DOOR MOTOR CIRCUITS FOR OPEN AND SHORT TO GROUND
1. Turn ignition switch OFF.
2. Disconnect the A/C auto amp. harness connector M49 and the mode door motor harness connector
M142.
3. Check continuity between A/C auto amp. harness connector M49 terminals 19, 20 and the mode door
motor harness connector M142 terminals 5, 6.
WJIA1084E
Monitor Item
Condition
Results
MODE FDBCK
Cycle mode switch through all modes, D/F
(
), VENT (
), B/L (
), and FOOT(
)
Voltage varies between D/F (
) and VENT (
), and
between VENT (
) and B/L (
).
August 2012
2012 Pathfinder
HAC-28
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
MODE DOOR MOTOR
4. Check continuity between A/C auto amp. harness connector M49 terminals 19, 20 and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness as necessary.
3.
CHECK A/C AUTO AMP. FOR MODE DOOR MOTOR POWER AND GROUND
1. Reconnect A/C auto amp. harness connector.
2. Turn ignition switch ON.
3. Press the mode switch to the D/F (
) mode.
4. Check voltage between A/C auto amp. harness connector M49 terminal 19 and terminal 20 while pressing
the mode switch to the VENT (
), and then the B/L (
) mode.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace A/C auto amp. Refer to
VTL-7, "Removal and Installation"
4.
CHECK MODE DOOR MOTOR PBR CIRCUITS FOR OPEN AND SHORT TO GROUND
1. Turn ignition switch OFF.
2. Disconnect the A/C auto amp. harness connectors.
3. Check continuity between A/C auto amp. harness connector M49 terminal 3, and M50 terminal 28 and the
mode door motor harness connector M142 terminals 2, 3.
4. Check continuity between A/C auto amp. harness connector M49 terminal 3, M50 terminal 28 and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace harness as necessary.
5.
CHECK PBR FEEDBACK SIGNAL CIRCUIT FOR OPEN AND SHORT TO GROUND
1. Check continuity between A/C auto amp. harness connector M49 terminal 7 and mode door motor har-
ness connector M142 terminal 4.
Connector
Terminal
Connector
Terminal
Continuity
M49
19
M142
6
Yes
20
1
Connector
Terminal
—
Continuity
M49
19
Ground
No
20
Connector
Terminals
Condition Voltage
(Approx.)
(+) (-)
M49
19
20
D/F (
) mode to VENT (
) mode
Battery voltage
20
19
VENT (
) mode to B/L (
) mode
Battery voltage
Connector
Terminal
Connector
Terminal
Continuity
M49
3
M142
2
Yes
M50 28
3
Connector
Terminal
—
Continuity
M49
3
Ground
No
M50
28
August 2012
2012 Pathfinder
MODE DOOR MOTOR
HAC-29
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
2. Check continuity between A/C auto amp. harness connector M49 terminal 7 and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace harness as necessary.
6.
CHECK A/C AUTO AMP. FOR 5 VOLT REFERENCE (VREF), VREF RETURN, AND FEEDBACK SIGNAL
1. Reconnect A/C auto amp. harness connectors.
2. Turn ignition switch ON.
3. Check voltage between A/C auto amp. harness connector M49 terminal 3, and M50 terminal 28.
4. Check voltage between A/C auto amp. harness connector M49 terminal 7 and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace A/C auto amp.. Refer to
VTL-7, "Removal and Installation"
7.
CHECK A/C AUTO AMP. FOR FEEDBACK SIGNAL
1. Reconnect the mode door motor harness connector M142.
2. Check voltage between A/C auto amp. harness connector M49 terminal 7 and ground.
Is the inspection result normal?
YES
>> Inspect mode door for binding or mechanical failure. If mode door moves freely, replace A/C auto
amp.. Refer to
VTL-7, "Removal and Installation"
.
NO
>> Replace the mode door motor. Refer to
VTL-28, "Removal and Installation"
.
Connector
Terminal
Connector
Terminal
Continuity
M49
7
M142
4
Yes
Connector
Terminal
—
Continuity
M49
7
Ground
No
Connector
Terminals
Connector
Terminals
Voltage (Approx.)
(+)
(-)
M50
28
M49
3
5V
Connector
Terminal
—
Voltage (Approx.)
M49
7
Ground
0V
Connector
Terminal
—
Voltage (Approx.)
M49
7
Ground
0.2 to 4.8V
August 2012
2012 Pathfinder
HAC-30
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
AIR MIX DOOR MOTOR
AIR MIX DOOR MOTOR
System Description
INFOID:0000000007356354
SYSTEM DESCRIPTION
SYMPTOM:
• Discharge air temperature does not change.
• Air mix door motor does not operate.
SYSTEM DESCRIPTION
Component Parts
Air mix door control system components are:
• A/C auto amp.
• A/C and AV switch assembly
• Air mix door motors (driver, passenger, and rear)
• PBR (built-into air mix door motors)
• In-vehicle sensor
• Ambient sensor
• Optical sensor
• Intake sensor
System Operation
The A/C auto amp. receives data from the temperature selected by the driver side, passenger side, and rear.
The A/C auto amp. then applies a voltage to one circuit of the appropriate air mix door motor, while ground is
applied to the other circuit, causing the appropriate air mix 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 A/C auto
amp. monitors the air mix door positions by measuring the voltage signal on the PBR circuits of each door.
In AUTO mode the air mix, intake, mode door, and defrost door positions are set by the A/C auto amp. which
determines the proper position based on inputs from the in-vehicle sensor, ambient sensor, optical sensor,
intake sensor, and the temperature selected by the driver and front and rear passengers.
Subsequently, HOT/COLD or DEFROST/VENT or FRESH/RECIRCULATION operation is selected. The new
door position data is returned to the A/C auto amp.
AWIIA0106GB
August 2012
2012 Pathfinder
AIR MIX DOOR MOTOR
HAC-31
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Air Mix Door Control Specification
COMPONENT DESCRIPTION
Air Mix Door Motors (front)
The driver (2) and passenger (1) air mix door motors are attached to
the front heater & cooling unit assembly. These motors rotate so that
the air mix door is opened or closed to a position set by the A/C auto
amp. Motor rotation is then conveyed through a shaft and the air mix
door position is then fed back to the A/C auto amp. by the PBR built
into the air mix door motors.
Air Mix Door Motor (rear)
The air mix door motor (rear) (1) is attached to the rear heater &
cooling unit assembly. These motors rotate so that the air mix door is
opened or closed to a position set by the front (or rear) air control.
Motor rotation is then conveyed through a shaft and the air mix door
position is then fed back to the A/C auto amp. by the PBR built into
the air mix door motors.
Air Mix Door Motor (Driver) Component Function Check
INFOID:0000000007356355
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE INCREASE
1. Turn the temperature control dial (driver) clockwise until 32
°
C (90
°
F) is displayed.
2. Check for hot air at discharge air outlets.
AWIIA0107GB
WJIA1978E
WJIA1979E
WJIA1979E
WJIA1245E
August 2012
2012 Pathfinder
HAC-32
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
AIR MIX DOOR MOTOR
>> GO TO 2.
2.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE
1. Turn the temperature control dial (driver) counterclockwise until 18
°
C (60
°
F) is displayed.
2. Check for cold air at discharge air outlets.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Go to diagnosis procedure. Refer to
HAC-39, "Intake Door Motor Diagnosis Procedure"
Air Mix Door Motor (Driver) Diagnosis Procedure
INFOID:0000000007356356
Regarding Wiring Diagram information, refer to
HAC-95, "Wiring Diagram - Automatic"
SYMPTOM:
• Discharge air temperature does not change.
• Air mix door motor does not operate.
1.
CHECK AIR MIX DOOR MOTOR (DRIVER) POSITION BALANCED RESISTOR (PBR) FEEDBACK VOLT-
AGE
1. Turn ignition switch ON.
2. Using CONSULT, check "DVR MIX FDBCK" in "DATA MONITOR" mode in "HVAC". Refer to
3. Observe "DVR MIX FDBACK" voltage while rotating temperature control dial (driver) between 32
°
C (90
°
F)
and 18
°
C (60
°
F).
Is the inspection result normal?
YES
>> • Air mix door motor (driver) is OK.
• Inspect air mix door (driver) for mechanical failure and repair if necessary. If air mix door (driver)
is OK, refer to
HAC-112, "Component Function Check"
for insufficient cooling or
for insufficient heating.
NO
>> GO TO 2.
2.
CHECK AIR MIX DOOR MOTOR (DRIVER) CIRCUITS FOR OPEN AND SHORT TO GROUND
1. Turn ignition switch OFF.
2. Disconnect the A/C auto amp. harness connector M49 and the air mix door motor (driver) harness con-
nector M147.
3. Check continuity between A/C auto amp. harness connector M49 terminals 17, 18 and the air mix door
motor (driver) harness connector M147 terminals 5, 6.
4. Check continuity between A/C auto amp. harness connector M49 terminals 17, 18 and ground.
Is the inspection result normal?
Monitor Item
Condition
Results
DVR MIX FDBCK
Rotate temperature control dial (driver) be-
tween 32
°
C (90
°
F) and 18
°
C (60
°
F)
Voltage varies with dial rotation between 0.2 and 4.8V.
Connector
Terminal
Connector
Terminal
Continuity
M49
17
M147
6
Yes
18
5
Connector
Terminal
—
Continuity
M49
17
Ground
No
18
August 2012
2012 Pathfinder
AIR MIX DOOR MOTOR
HAC-33
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
YES
>> GO TO 3.
NO
>> Repair or replace harness as necessary.
3.
CHECK A/C AUTO AMP. FOR AIR MIX DOOR MOTOR (DRIVER) POWER AND GROUND
1. Reconnect A/C auto amp. harness connector.
2. Turn ignition switch ON.
3. Rotate temperature control dial (driver) to 32
°
C (90
°
F).
4. Check voltage between A/C auto amp. harness connector M49 terminal 17 and terminal 18 while rotating
temperature control dial (driver) to 18
°
C (60
°
F) and back to 32
°
C (90
°
F).
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace A/C auto amp. Refer to
VTL-7, "Removal and Installation"
.
4.
CHECK AIR MIX DOOR MOTOR (DRIVER) PBR CIRCUITS FOR OPEN AND SHORT TO GROUND
1. Turn ignition switch OFF.
2. Disconnect the A/C auto amp. harness connectors.
3. Check continuity between A/C auto amp. harness connector M49 terminal 3, connector M50 terminal 28
and air mix door motor (driver) harness connector M147 terminals 1, 3.
4. Check continuity between A/C auto amp. harness connector M49 terminal 3, M50 terminal 28 and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace harness as necessary.
5.
CHECK PBR FEEDBACK SIGNAL CIRCUIT FOR OPEN AND SHORT TO GROUND
1. Check continuity between A/C auto amp. harness connector M49 terminal 6 and air mix door motor
(driver) harness connector M147 terminal 2.
2. Check continuity between A/C auto amp. harness connector M49 terminal 6 and ground.
Is the inspection result normal?
YES
>> GO TO 6.
Connector
Terminals
Condition Voltage
(Approx.)
(+) (-)
M49
17
18
While rotating temperature control
dial (driver) from 32
°
C (90
°
F) to 18
°
C
(60
°
F)
Battery voltage
18
17
While rotating temperature control
dial (driver) from 18
°
C (60
°
F) to 32
°
C
(90
°
F)
Battery voltage
Connector
Terminal
Connector
Terminal
Continuity
M49
3
M147
3
Yes
M50
28
1
Connector
Terminal
—
Continuity
M49
3
Ground
No
M50
28
Connector
Terminal
Connector
Terminal
Continuity
M49
6
M147
2
Yes
Connector
Terminal
—
Continuity
M49
6
Ground
No
August 2012
2012 Pathfinder
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст