Nissan Pathfinder (2011 year). Manual — part 461
INTAKE DOOR MOTOR
HAC-151
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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HAC
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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).
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Go to diagnosis procedure. Refer to
HAC-151, "Intake Door Motor Diagnosis Procedure"
.
Intake Door Motor Diagnosis Procedure
INFOID:0000000006243713
Regarding Wiring Diagram information, refer to
HAC-172, "Wiring Diagram - Manual"
.
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
2011 Pathfinder
HAC-152
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
INTAKE DOOR MOTOR
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
2011 Pathfinder
BLOWER MOTOR
HAC-153
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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BLOWER MOTOR
System Description
INFOID:0000000006243714
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:0000000006243715
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.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Go to diagnosis procedure. Refer to
HAC-154, "Front Blower Motor Diagnosis Procedure"
.
AWIIA0272GB
AWIIA1196ZZ
2011 Pathfinder
HAC-154
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
BLOWER MOTOR
Front Blower Motor Diagnosis Procedure
INFOID:0000000006243716
Regarding Wiring Diagram information, refer to
HAC-172, "Wiring Diagram - Manual"
.
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
2011 Pathfinder
BLOWER MOTOR
HAC-155
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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1. Turn ignition switch OFF.
2. Disconnect front blower motor harness connector.
3. Turn ignition switch ON.
4. Select any front blower speed except OFF.
5. Check voltage between front blower motor harness connector
M62 terminal 2 and ground.
Is inspection result normal?
YES
>> GO TO 12.
NO
>> GO TO 4.
4.
CHECK FRONT BLOWER MOTOR RELAY
1. Turn Ignition switch OFF.
2. Check front blower motor relay. Refer to
HAC-157, "Front Blower Motor Component Inspection"
Is inspection result normal?
YES
>> GO TO 5.
NO
>> Replace front blower motor relay.
5.
CHECK FRONT BLOWER MOTOR RELAY POWER SUPPLY (SWITCH SIDE)
Check voltage between front blower motor relay harness connector
E54 terminals 7 and 5 and ground.
Is inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
6.
CHECK FRONT BLOWER MOTOR RELAY POWER SUPPLY (COIL SIDE)
1. Turn ignition switch ON.
2. Check voltage between front blower motor relay harness con-
nector E54 terminal 1 and ground.
Is inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace harness as necessary.
7.
CHECK FRONT BLOWER MOTOR POWER FROM RELAY TO FRONT BLOWER MOTOR
2 - Ground
: Battery voltage
WJIA1331E
A
Condition
Voltage (Ap-
prox.)
(+)
Front air control
connector
Terminal
(-)
M54
5 Ground
Blower motor
relay power
supply
Battery voltage
M54
7 Ground
Blower motor
relay power
supply
Battery voltage
WJIA1634E
A
Condition
Voltage (Ap-
prox.)
(+)
Front air control
connector
Terminal
(-)
M54
1 Ground
Blower motor
relay power
supply (coil
side)
Battery voltage
WJIA0504E
2011 Pathfinder
HAC-156
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
BLOWER MOTOR
1. Turn ignition switch OFF.
2. Check continuity between front blower motor relay harness con-
nector E54 terminals 6 and 3 and front blower motor harness
connector M62 terminal 2.
Is inspection result normal?
YES
>> Repair open front blower motor relay ground circuit.
NO
>> Repair harness or connector between the front blower
motor relay and the front blower motor.
8.
REPLACE FUSE
.
Does fuse No. 24 or 27 open when the front blower motor is turned on?
YES or NO
YES
>> GO TO 10.
NO
>> GO TO 9.
9.
REPLACE FUSE
.
Does fuse No. 8 open when the ignition switch is turned ON?
YES or NO
YES
>> Repair or replace harness as necessary.
NO
>> Inspection End.
10.
CHECK FRONT BLOWER MOTOR POWER SUPPLY CIRCUIT FOR SHORT
1. Turn ignition switch OFF.
2. Disconnect front blower motor connector.
3. Check continuity between front blower motor harness connector
M62 terminal 2 and ground.
Is inspection result normal?
YES
>> GO TO 11.
NO
>> Repair or replace harness as necessary.
11.
CHECK FRONT BLOWER MOTOR RELAY (SWITCH SIDE) POWER SUPPLY CIRCUIT FOR SHORT
1. Disconnect front blower motor relay connector.
2. Check continuity between the front blower motor relay harness
connector E54 terminal 7 and terminal 5 and ground.
Is inspection result normal?
YES
>> Check front blower motor. Refer to
Blower Motor Diagnosis Procedure"
.
NO
>> Repair harness or connector.
12.
CHECK FRONT BLOWER MOTOR
1. Turn ignition switch OFF.
2. Check front blower motor. Refer to
HAC-157, "Front Blower Motor Component Inspection"
Is inspection result normal?
3, 6 - 2
: Continuity should exist.
WJIA1333E
2 - Ground
: Continuity should not exist.
WJIA0649E
7, 5 - Ground
: Continuity should not exist.
WJIA1334E
2011 Pathfinder
BLOWER MOTOR
HAC-157
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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YES
>> GO TO 13.
NO
>> Replace front blower motor. Refer to
.
13.
CHECK FRONT BLOWER MOTOR RESISTOR
Check front blower motor resistor. Refer to
HAC-157, "Front Blower Motor Component Inspection"
Is inspection result normal?
YES
>> GO TO 14.
NO
>> Replace front blower motor resistor. Refer to
VTL-16, "Removal and Installation"
14.
CHECK FRONT BLOWER SWITCH
Check front blower switch. Refer to
HAC-157, "Front Blower Motor Component Inspection"
.
Is inspection result normal?
YES
>> GO TO 15.
NO
>> Replace front blower switch. Refer to
VTL-7, "Removal and Installation"
.
15.
CHECK FRONT BLOWER MOTOR GROUND CIRCUIT TO FRONT BLOWER MOTOR RESISTOR
1. Disconnect front blower motor resistor harness connector.
2. Check continuity between front blower motor connector M62 (A)
terminal 1 and front blower motor resistor harness connector
M121 (B) terminal 3.
Is inspection result normal?
YES
>> Repair harness or connector between front blower
switch connector M51 terminal 8 and ground.
NO
>> Repair harness or connector between front blower motor resistor and front blower motor.
16.
CHECK FRONT BLOWER SWITCH
Check front blower switch. Refer to
HAC-157, "Front Blower Motor Component Inspection"
.
Is inspection result normal?
YES
>> Repair harness or connector between front blower motor switch connector M51 terminal 8 and
front blower motor resistor connector M121 terminal 3.
NO
>> Replace front blower switch. Refer to
VTL-7, "Removal and Installation"
.
Front Blower Motor Component Inspection
INFOID:0000000006243717
COMPONENT INSPECTION
Front Blower Motor Relay
A
B
Connector
Terminal Connector
Terminal
Continuity
Front blower motor:
M62
1
Front blower mo-
tor resistor: M121
3
Yes
WJIA1676E
2011 Pathfinder
HAC-158
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
BLOWER MOTOR
Check continuity between terminals by supplying 12 volts and
ground to coil side terminals of relay.
Front Blower Motor
Confirm smooth rotation of the blower motor.
• Ensure that there are no foreign particles inside the blower unit.
• Apply 12 volts to terminal 2 and ground to terminal 1 and verify that
the motor operates freely and quietly.
Front Blower Switch
Check continuity between the terminals at each front blower switch
position.
Blower Motor Resistor
LJIA0068E
WJIA1508E
WJIA0508E
2011 Pathfinder
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