Nissan Pathfinder (2010 year). Instruction — part 458
HAC-140
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
AIR MIX DOOR MOTOR
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:0000000005256993
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.
Can a symptom be duplicated?
YES
>> Inspection End.
NO
>> Go to diagnosis procedure. Refer to
HAC-140, "Air Mix Door Motor Diagnosis Procedure"
Air Mix Door Motor Diagnosis Procedure
INFOID:0000000005256994
Regarding Wiring Diagram information, refer to
DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR
1.
CHECK POWER SUPPLY CIRCUITS FOR AIR MIX DOOR MOTOR
1. Turn ignition switch OFF.
2. Disconnect front air control connector and air mix door motor
connector.
3. Check continuity between front air control harness connector
M52 terminal 2 and 3 and air mix door motor harness connector
M149 terminal 6 and 5.
Is inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace harness as necessary.
2.
CHECK PBR REFERENCE SIGNAL VOLTAGE
AWIIA1195ZZ
2 - 6
: Continuity should exist.
3 - 5
: Continuity should exist.
WJIA1318E
2010 Pathfinder
AIR MIX DOOR MOTOR
HAC-141
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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1. Reconnect the front air control connector.
2. Turn ignition switch ON.
3. Check voltage between air mix door motor harness connector
M149 terminal 1 and ground.
Is inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK PBR REFERENCE VOLTAGE CIRCUIT BETWEEN AIR MIX DOOR MOTOR AND FRONT AIR
CONTROL
1. Turn ignition switch OFF.
2. Disconnect the front air control connector.
3. Check continuity between air mix door motor harness connector
M149 (B) terminal 1 and front air control harness connector M52
(A) terminal 23.
Is inspection result normal?
YES
>> Replace front air control. Refer to
VTL-7, "Removal and Installation"
.
NO
>> Repair or replace harness as necessary.
4.
CHECK PBR GROUND REFERENCE CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the front air control connector.
3. Check continuity between air mix door motor harness connector
M149 terminal 3 and front air control harness connector M52 ter-
minal 26.
Is inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace harness as necessary.
5.
CHECK PBR FEEDBACK SIGNAL
1. Reconnect the front air control connector and air mix door motor
connector.
2. Turn ignition switch ON.
3. Check voltage between front air control harness connector M52
terminal 22 and ground.
4. Rotate temperature control dial through complete range.
Is inspection result normal?
YES
>> Replace front air control. Refer to
NO
>> GO TO 6.
6.
CHECK PBR FEEDBACK CIRCUIT
1 - Ground
: Approx. 5V
WJIA1319E
A
B
Connector
Terminal Connector
Terminal
Continuity
Front air control:
M52
23
Air mix door motor
: M143
1
Yes
WJIA1656E
3 - 26
: Continuity should exist.
WJIA1320E
22 - Ground
: Approx. 0V - 5V
WJIA1096E
2010 Pathfinder
HAC-142
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
AIR MIX DOOR MOTOR
1. Turn ignition switch OFF.
2. Disconnect the air mix door motor connector and front air control
connector.
3. Check continuity between air mix door motor harness connector
M149 terminal 2 and front air control harness connector M52 ter-
minal 22.
Is inspection result normal?
YES
>> Replace air mix door motor. Refer to
.
NO
>> Repair or replace harness as necessary.
2 - 22
: Continuity should exist.
WJIA1321E
2010 Pathfinder
INTAKE DOOR MOTOR
HAC-143
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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INTAKE DOOR MOTOR
System Description
INFOID:0000000005256995
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:0000000005256996
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
2010 Pathfinder
HAC-144
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
INTAKE DOOR MOTOR
2. Turn mode dial to vent mode (
).
3. Press REC (
) switch.
4. Press REC (
) switch again.
5. Listen for intake door position change (you should hear blower sound change slightly).
Can a symptom be duplicated?
YES
>> Inspection End.
NO
>> Go to diagnosis procedure. Refer to
HAC-144, "Intake Door Motor Diagnosis Procedure"
.
Intake Door Motor Diagnosis Procedure
INFOID:0000000005256997
Regarding Wiring Diagram information, refer to
DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR
1.
CHECK INTAKE DOOR MOTOR CIRCUIT VOLTAGE
1. Turn ignition switch OFF.
2. Disconnect intake door motor connector.
3. Turn ignition switch ON.
4. Rotate the temperature control dial counterclockwise.
5. Check voltage between intake door motor harness connector
M58 terminal 6 and ground.
Is inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK INTAKE DOOR MOTOR CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between front air control harness connector
M52 (A) terminal 5 and intake door motor harness connector
M58 (B) terminal 6.
Is inspection result normal?
YES
>> Replace front air control. Refer to
NO
>> Repair or replace harness as necessary.
3.
CHECK INTAKE DOOR MOTOR CIRCUIT VOLTAGE
1. Rotate the temperature control dial clockwise.
2. Check voltage between intake door motor harness connector
M58 terminal 1 and ground.
Is inspection result normal?
YES
>> Replace intake door motor. Refer to
.
NO
>> GO TO 4.
4.
CHECK INTAKE DOOR MOTOR CIRCUIT FOR OPEN
6 - Ground
: Battery voltage
AWIIA0853ZZ
5 - 6
: Continuity should exist.
AWIIA0854ZZ
1 - Ground
:Battery voltage
AWIIA0848ZZ
2010 Pathfinder
INTAKE DOOR MOTOR
HAC-145
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between front air control harness connector
M52 (A) terminal 4 and intake door motor harness connector
M58 (B) terminal 1.
Is inspection result normal?
YES
>> Replace front air control. Refer to
VTL-7, "Removal and Installation"
.
NO
>> Repair or replace harness as necessary.
A
B
Connector
Terminal Connector
Terminal
Continuity
Front air control:
M52
4
Intake door motor:
M58
1
Yes
AWIIA0855ZZ
2010 Pathfinder
HAC-146
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
BLOWER MOTOR
BLOWER MOTOR
System Description
INFOID:0000000005256998
Component Parts
Blower speed control system components are:
• Front air control
• Front blower motor resistor
• Front blower motor
• Front blower relay
System Operation
COMPONENT DESCRIPTION
Blower Motor Resistor
The front blower motor resistor (1) is located on the heater and cool-
ing unit assembly. The front blower motor resistor grounds the front
blower motor through a series of 1, 2, or 3 resistors, depending upon
speed selected. For high speed operation the front blower motor
resistor is circumvented and the front blower motor grounds directly
(
⇒
: Front).
Front Blower Motor Component Function Check
INFOID:0000000005256999
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - FRONT BLOWER
1. Rotate the blower control dial clockwise. Blower should operate.
2. Rotate the blower control dial clockwise, and continue checking blower speed until all speeds are
checked.
Can the symptom be duplicated?
YES
>> Inspection End.
NO
>> Go to diagnosis procedure. Refer to
HAC-147, "Front Blower Motor Diagnosis Procedure"
.
AWIIA0272GB
AWIIA1196ZZ
2010 Pathfinder
BLOWER MOTOR
HAC-147
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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Front Blower Motor Diagnosis Procedure
INFOID:0000000005257000
Regarding Wiring Diagram information, refer to
SYMPTOM: Blower motor operation is malfunctioning under starting
blower speed control.
1.
DIAGNOSTIC PROCEDURE
1. Turn ignition switch ON.
2. Turn the front blower switch to each of its four speeds.
Does blower motor rotate normally at each speed?
YES or NO
YES
>> Inspection End.
NO
>> 1. Does not rotate at any speed, GO TO 2.
2. Does not rotate at 1 - 3 speed, GO TO 13.
3. Does not rotate at 4 speed, GO TO 16.
2.
CHECK FUSES
1. Check 15A fuses (Nos. 24 and 27, located in the fuse and fusible link box). Refer to
.
2. Check 10A fuse [No. 8, located in the fuse block (JB)]. Refer to
.
Is inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 8.
3.
CHECK FRONT BLOWER MOTOR POWER SUPPLY
WJIA1503E
2010 Pathfinder
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