Nissan Pathfinder (2009 year). Instruction — part 468
MODE DOOR MOTOR
HAC-139
< COMPONENT 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.
Can a symptom be duplicated?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
PERFORM COMPLETE OPERATIONAL CHECK
Perform a complete operational check and check for any symptoms. Refer to
.
Can a symptom be duplicated?
YES
>> Refer to
HAC-174, "Symptom Matrix Chart"
NO
>> System OK.
3.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.
CHECK MODE DOOR OPERATION
Check and verify mode door mechanism for smooth operation in each mode.
Is inspection result normal?
YES
>> GO TO 5.
NO
>> Repair as necessary.
5.
CHECK THE MODE DOOR MOTOR PBR CIRCUIT
Perform diagnostic procedure for the mode door motor. Refer to
HAC-139, "Mode Door Motor (Front) Diagno-
Is inspection result normal?
YES
>> GO TO 6.
NO
>> Repair PBR circuit or replace motor.
6.
RECHECK FOR SYMPTOMS
Perform a complete operational check and check for any symptoms. Refer to
.
Does another symptom exist?
YES
>> Repair as necessary.
NO
>> Replace front air control. Refer to
VTL-7, "Removal and Installation"
.
Mode Door Motor (Front) Diagnosis Procedure
INFOID:0000000003935962
MODE DOOR MOTOR DIAGNOSTIC PROCEDURE
1.
CHECK POWER SUPPLY AND GROUND CIRCUITS FOR MODE DOOR MOTOR
2009 Pathfinder
HAC-140
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
MODE DOOR MOTOR
1.
Turn ignition switch OFF.
2.
Disconnect front air control connector and mode door motor
connector.
3.
Check continuity between front air control harness connector
M52 terminal 1 and mode door motor harness connector M142
terminal 1 and between front air control harness connector M52
terminal 14 and mode door motor harness connector M142 ter-
minal 6.
Is inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace harness as necessary.
2.
CHECK PBR REFERENCE SIGNAL VOLTAGE
1.
Reconnect the front air control connector.
2.
Turn ignition switch ON.
3.
Check voltage between mode door motor harness connector
M142 terminal 3 and ground.
Is inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK PBR REFERENCE VOLTAGE CIRCUIT BETWEEN MODE DOOR AND FRONT AIR CONTROL
1.
Turn ignition switch OFF.
2.
Disconnect the front air control connector.
3.
Check continuity between mode door motor harness connector
M142 terminal 3 and front air control harness connector M52 ter-
minal 23.
Is inspection result normal?
YES
>> Replace front air control. Refer to
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 mode door motor harness connector
M142 terminal 2 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 - 1
: Continuity should exist.
14 - 6
: Continuity should exist.
WJIA1241E
3 - Ground
: Approx. 5V
WJIA1242E
3 - 23
: Continuity should exist.
WJIA1085E
2 - 26
: Continuity should exist.
WJIA1087E
2009 Pathfinder
MODE DOOR MOTOR
HAC-141
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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HAC
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1.
Reconnect the front air control connector and mode door motor
connector.
2.
Turn ignition switch ON.
3.
Check voltage between front air control harness connector M52
terminal 21 and ground.
4.
Press mode switch through all modes.
Is inspection result normal?
YES
>> Replace front air control. Refer to
NO
>> GO TO 6.
6.
CHECK PBR FEEDBACK CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect the mode door motor connector and front air control
harness connector.
3.
Check continuity between mode door motor harness connector
M142 terminal 4 and front air control harness connector M52 ter-
minal 21.
Is inspection result normal?
YES
>> Replace mode door motor. Refer to
.
NO
>> Repair or replace harness as necessary.
21 - Ground
: Approx. 0 - 5V
WJIA1088E
4 - 21
: Continuity should exist.
WJIA1089E
2009 Pathfinder
HAC-142
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
AIR MIX DOOR MOTOR
AIR MIX DOOR MOTOR
System Description
INFOID:0000000003935963
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
2009 Pathfinder
AIR MIX DOOR MOTOR
HAC-143
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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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:0000000003935964
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
>> GO TO 4.
NO
>> GO TO 3.
3.
PERFORM COMPLETE OPERATIONAL CHECK
Perform a complete operational check and check for any symptoms. Refer to
.
Can a symptom be duplicated?
YES
>> Refer to
HAC-174, "Symptom Matrix Chart"
NO
>> System OK.
4.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 5.
5.
CHECK AIR MIX DOOR OPERATION
Check and verify air mix door mechanism for smooth operation from maximum cold to maximum heat in each
mode.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair as necessary.
6.
CHECK THE AIR MIX DOOR MOTOR PBR CIRCUIT
Perform diagnostic procedure for the air mix door motor. Refer to
HAC-144, "Air Mix Door Motor Diagnosis
.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair PBR circuit or replace air mix door motor. Refer to
VTL-30, "Removal and Installation"
.
7.
RECHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to
.
AWIIA1195ZZ
2009 Pathfinder
HAC-144
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
AIR MIX DOOR MOTOR
Does another symptom exist?
YES
>> Refer to
HAC-174, "Symptom Matrix Chart"
.
NO
>> Replace front air control. Refer to
VTL-7, "Removal and Installation"
.
Air Mix Door Motor Diagnosis Procedure
INFOID:0000000003935965
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
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
2 - 6
: Continuity should exist.
3 - 5
: Continuity should exist.
WJIA1318E
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
2009 Pathfinder
AIR MIX DOOR MOTOR
HAC-145
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
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F
G
H
J
K
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M
A
B
HAC
N
O
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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.
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.
3 - 26
: Continuity should exist.
WJIA1320E
22 - Ground
: Approx. 0V - 5V
WJIA1096E
2 - 22
: Continuity should exist.
WJIA1321E
2009 Pathfinder
HAC-146
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
INTAKE DOOR MOTOR
INTAKE DOOR MOTOR
System Description
INFOID:0000000003935966
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:0000000003935967
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
2009 Pathfinder
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