Nissan Pathfinder (2011 year). Instruction — part 460
MODE DOOR MOTOR
HAC-143
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
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:0000000006243707
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
2011 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
2011 Pathfinder
MODE DOOR MOTOR
HAC-145
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
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-27, "Removal and Installation"
.
Connector
Terminal
—
Voltage (Approx.)
M52
21
Ground
0.2 to 4.8V
2011 Pathfinder
HAC-146
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
AIR MIX DOOR MOTOR
AIR MIX DOOR MOTOR
System Description
INFOID:0000000006243708
SYSTEM DESCRIPTION
Component Parts
Air mix door control system components are:
• Front air control
• Air mix door motor
• PBR (built into air mix door motor)
• Intake sensor
System Operation
The front air control receives data from the temperature selected by the driver. The front air control then
applies a voltage to one circuit of the air mix door motor, while ground is applied to the other circuit, causing
the 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 front air control monitors the air mix door positions by measur-
ing the voltage signal on the PBR circuits of each door.
Air Mix Door Control Specification
COMPONENT DESCRIPTION
Air Mix Door Motors
WJIA1316E
WJIA0435E
2011 Pathfinder
AIR MIX DOOR MOTOR
HAC-147
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
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M
A
B
HAC
N
O
P
The air mix door motor (1) is attached to the front heater and cooling
unit assembly. This motor rotates so that the air mix door is opened
or closed to a position set by the front air control. Motor rotation is
then conveyed through a shaft and the air mix door position is then
fed back to the front air control by the PBR built into the air mix door
motor (
⇒
: Front).
↓
Air Mix Door Motor Component Function Check
INFOID:0000000006243709
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE INCREASE
1. Blower must be on (1, 2, 3, 4).
2. Turn the temperature control dial clockwise to maximum heat.
3. Check for hot air at discharge air outlets.
>> GO TO 2.
2.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE
1. Turn the temperature control dial counterclockwise to maximum cold.
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-147, "Air Mix Door Motor Diagnosis Procedure"
Air Mix Door Motor Diagnosis Procedure
INFOID:0000000006243710
Regarding Wiring Diagram information, refer to
HAC-172, "Wiring Diagram - Instruction"
.
SYMPTOM:
• Discharge air temperature does not change.
• Air mix door motor does not operate.
1.
CHECK AIR MIX 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 air mix door motor harness connector
M149.
3. Check continuity between front air control harness connector M52 terminals 2, 3 and the air mix door
motor harness connector M149 terminals 5, 6.
4. Check continuity between front air control harness connector M52 terminals 2, 3 and ground.
AWIIA1195ZZ
Connector
Terminal
Connector
Terminal
Continuity
M52
2
M149
6
Yes
3
5
Connector
Terminal
—
Continuity
M52
2
Ground
No
3
2011 Pathfinder
HAC-148
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
AIR MIX DOOR MOTOR
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace harness as necessary.
2.
CHECK FRONT AIR CONTROL FOR AIR MIX DOOR MOTOR POWER AND GROUND
1. Reconnect front air control harness connector.
2. Turn ignition switch ON.
3. Rotate temperature control dial to 32
°
C (90
°
F).
4. Check voltage between front air control harness connector M52 terminal 2 and terminal 3 while rotating
temperature control dial to 18
°
C (60
°
F) and back to 32
°
C (90
°
F).
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace front air control. Refer to
VTL-7, "Removal and Installation"
.
3.
CHECK AIR MIX 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 air mix door motor
harness connector M149 terminals 1, 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 22 and air mix door motor har-
ness connector M149 terminal 2.
2. Check continuity between front air control harness connector M52 terminal 22 and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace harness as necessary.
Connector
Terminals
Condition Voltage
(Approx.)
(+) (-)
M52
2
3
While rotating temperature control
dial from 32
°
C (90
°
F) to 18
°
C (60
°
F)
Battery voltage
3
2
While rotating temperature control
dial from 18
°
C (60
°
F) to 32
°
C (90
°
F)
Battery voltage
Connector
Terminal
Connector
Terminal
Continuity
M52
23
M149
1
Yes
26
3
Connector
Terminal
—
Continuity
M52
23
Ground
No
26
Connector
Terminal
Connector
Terminal
Continuity
M52
22
M149
2
Yes
Connector
Terminal
—
Continuity
M52
22
Ground
No
2011 Pathfinder
AIR MIX DOOR MOTOR
HAC-149
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
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 22 and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace front air control. Refer to
VTL-7, "Removal and Installation"
.
6.
CHECK FRONT AIR CONTROL FOR FEEDBACK SIGNAL
1. Reconnect the air mix door motor harness connector M149.
2. Check voltage between front air control harness connector M52 terminal 22 and ground.
Is the inspection result normal?
YES
>> Inspect air mix door for binding or mechanical failure. If air mix door moves freely, replace front air
control. Refer to
VTL-7, "Removal and Installation"
NO
>> Replace air mix door motor. Refer to
VTL-29, "Removal and Installation"
Connector
Terminal
Connector
Terminal
Voltage (Approx.)
(+)
(-)
M52
23
M52
26
5V
Connector
Terminal
—
Voltage (Approx.)
M52
22
Ground
0V
Connector
Terminal
—
Voltage (Approx.)
M52
22
Ground
0.2 to 4.8V
2011 Pathfinder
HAC-150
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
INTAKE DOOR MOTOR
INTAKE DOOR MOTOR
System Description
INFOID:0000000006243711
SYSTEM DESCRIPTION
Component Parts
Intake door control system components are:
• Front air control
• Intake door motor
• Intake sensor
System Operation
The intake door control determines the intake door position based on the position of the recirculation switch.
When the recirculation switch is depressed the intake door motor rotates closing off the fresh air inlet and
recirculating the cabin air. If the recirculation switch is depressed again, the intake door motor rotates in the
opposite direction, again allowing fresh air into the cabin.
COMPONENT DESCRIPTION
Intake door motor
The intake door motor is attached to the intake unit. It rotates so that
air is drawn from inlets set by the front air control. Motor rotation is
conveyed to a lever which activates the intake door.
Intake Door Motor Component Function Check
INFOID:0000000006243712
SYMPTOM:
• Intake door does not change.
• Intake door motor does not operate normally.
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - REC (
)
1. Turn blower control dial to 4.
WJIA1478E
WJIA1486E
2011 Pathfinder
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