Nissan Pathfinder (2006 year). Manual — part 52
TROUBLE DIAGNOSIS
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2006 Pathfinder
12.
CHECK VARIABLE BLOWER CONTROL SIGNAL CIRCUIT
1.
Disconnect front air control connector.
2.
Check continuity between front air control harness connector
M50 terminal 32 and variable blower control harness connector
M122 terminal 2.
OK or NG
OK
>> Check blower motor. If OK, replace variable blower con-
trol. Refer to
.
NG
>> Repair harness or connector.
COMPONENT INSPECTION
Front Blower Motor Relay
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 1 and ground to terminal 2 and verify
that the motor operates freely and quietly.
32 - 2
: Continuity should exist.
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LJIA0068E
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ATC-82
TROUBLE DIAGNOSIS
2006 Pathfinder
Rear Blower Motor Circuit
EJS004P9
SYMPTOM:
●
Blower motor operation is malfunctioning.
INSPECTION FLOW
*1
ATC-55, "Operational Check (Rear)"
*2
ATC-91, "Rear Blower Switch
(Front)"
*3
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2006 Pathfinder
SYSTEM DESCRIPTION
Component Parts
Rear blower speed control system components are:
●
Front air control
●
Rear blower switch (front)
●
Rear blower switch (rear)
●
Rear blower motor resistor
●
Rear blower motor
●
Rear blower motor relay
System Operation
Rear Blower Control
When the rear blower switch (front) is in the OFF position, the rear blower motor cannot operate.
When the rear blower switch (front) is in the REAR position, it allows the rear blower switch (rear) to control
the rear blower motor speed. In any other position (1-4), the rear blower switch (front) controls the rear blower
motor speed regardless of the rear blower switch (rear) position.
DIAGNOSTIC PROCEDURE FOR REAR BLOWER MOTOR
Rear Fan Switch (Rear) Circuit
SYMPTOM:
●
Rear blower motor does not rotate when rear blower switch (front) is set to REAR position and rear blower
switch (rear) is set at 1 - 4 speed.
1.
CHECK REAR BLOWER MOTOR OPERATION
Rear blower motor rotates normally when rear blower switch (front) is set at 1 - 4 speed.
OK or NG
OK
>> GO TO 2.
NG
ATC-85, "Trouble Diagnosis Procedure For Rear Blower Motor (1 - 4 Speed)"
2.
CHECK REAR BLOWER SWITCH (FRONT)
Refer to
ATC-91, "Rear Blower Switch (Front)"
OK or NG
OK
>> GO TO 3.
NG
>> Replace rear blower switch (front). Refer to
.
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ATC-84
TROUBLE DIAGNOSIS
2006 Pathfinder
3.
CHECK REAR BLOWER SWITCH (REAR)
OK or NG
OK
>> GO TO 4.
NG
>> Replace rear blower switch (rear). Refer to
4.
CHECK CIRCUIT CONTINUITY
1.
Turn ignition switch OFF.
2.
Disconnect rear blower switch (front) connector and rear air con-
trol connector.
3.
Check continuity between rear blower switch (front) harness
connector M52 terminal 2 and rear air control harness connector
M208 terminal 10.
OK or NG
OK
>> Inspection End.
NG
>> Repair harness or connector.
2 - 10
: Continuity should exist.
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TROUBLE DIAGNOSIS
ATC-85
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ATC
2006 Pathfinder
Trouble Diagnosis Procedure For Rear Blower Motor (1 - 4 Speed)
SYMPTOM:
●
Rear blower motor does not rotate when rear blower switch (front) is set at 1 - 4 speed.
Inspection Flow
*1
.
*2
ATC-85, "Trouble Diagnosis Proce-
dure For Rear Blower Motor (1 - 4
Speed)"
*3
WJIA1058E
ATC-86
TROUBLE DIAGNOSIS
2006 Pathfinder
1.
DIAGNOSTIC PROCEDURE
Blower motor rotates normally at each speed.
OK or NG
OK
>> Inspection End.
NG
>> 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 18.
2.
CHECK FUSES
Check 15A fuses (Nos. 28 and 31, located in the fuse and fusible link box). Refer to
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 8.
3.
CHECK REAR BLOWER MOTOR POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect rear blower motor connector.
3.
Select any rear blower speed except OFF.
4.
Turn ignition switch ON.
5.
Check voltage between rear blower motor harness connector
B201 terminal 1 and ground.
OK or NG
OK
>> GO TO 11.
NG
>> GO TO 4.
4.
CHECK REAR BLOWER MOTOR RELAY
ATC-91, "Rear Blower Motor Relay"
OK or NG
OK
>> GO TO 5.
NG
>> Replace rear blower motor relay.
5.
CHECK REAR BLOWER MOTOR POWER FROM RELAY TO REAR BLOWER MOTOR
1.
Turn ignition switch OFF.
2.
Reconnect rear blower motor connector.
3.
Disconnect rear blower motor relay M163.
4.
Turn ignition switch ON.
5.
Set rear blower switch (front) to any position except OFF, REAR,
or 4 - speed.
6.
Momentarily (no more than 4 seconds), connect a jumper wire
between rear blower motor relay connector M163 (harness side)
terminals 6 and 7.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 10.
1 - Ground
: Battery voltage
WJIA1119E
Rear blower motor should rotate.
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2006 Pathfinder
6.
CHECK REAR BLOWER MOTOR RELAY (COIL SIDE) POWER SUPPLY CIRCUIT
Check voltage between rear blower motor relay harness connector
M163 terminal 2 and ground.
OK or NG
OK
>> GO TO 7.
NG
>> Repair harness or connector.
7.
CHECK REAR BLOWER MOTOR RELAY (COIL SIDE) GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect the front air control M50.
3.
Check continuity between rear blower motor relay harness con-
nector M163 terminal 1 and front air control harness connector
M50 terminal 39.
OK or NG
OK
>> Replace front air control. Refer to
.
NG
>> Repair harness or connector.
8.
REPLACE FUSE
Refer to
PG-84, "FUSE AND FUSIBLE LINK BOX"
Fuse should not open when rear blower motor is activated.
OK or NG
OK
>> Inspection End.
NG
>> GO TO 9.
9.
CHECK REAR BLOWER MOTOR
Refer to
OK or NG
OK
>> Repair harness between the rear blower motor and the fuse.
NG
>> Replace rear blower motor. refer to
10.
CHECK REAR BLOWER MOTOR RELAY (SWITCH SIDE) POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect rear blower motor relay M163.
3.
Check voltage between rear blower motor relay harness con-
nector E25 terminals 6 and 3, and ground.
OK or NG
OK
>> GO TO 20.
NG
>> Repair harness or connector.
2 - Ground
: Battery voltage
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1 - 39
: Continuity should exist.
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3, 6 - Ground
: Battery voltage should
exist.
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ATC-88
TROUBLE DIAGNOSIS
2006 Pathfinder
11.
CHECK REAR BLOWER MOTOR
.
OK or NG
OK
>> GO TO 12.
NG
>> Replace rear blower motor. Refer to
12.
CHECK REAR BLOWER SWITCH (FRONT)
ATC-91, "Rear Blower Switch (Front)"
OK or NG
OK
>> GO TO 15.
NG
>> Replace rear blower switch (front). Refer to
.
13.
CHECK REAR BLOWER MOTOR RESISTOR
ATC-92, "Rear Blower Motor Resistor"
.
OK or NG
OK
>> GO TO 14.
NG
>> Replace rear blower motor resistor. Refer to
ATC-148, "REAR BLOWER MOTOR RESISTOR"
.
14.
CHECK REAR BLOWER SWITCH (FRONT) CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect rear blower switch (front) M52.
3.
Reconnect rear blower motor resistor harness connector B133.
4.
Turn ignition switch ON.
5.
Check voltage between each rear blower switch (front) connec-
tor M52 terminals 3, 5, 7, and 8, and ground.
OK or NG
OK
>> GO TO 17.
NG
>> GO TO 16.
Terminal No.
Voltage
(Approx.)
(+)
(-)
3
Ground
Battery voltage
5
7
8
WJIA1267E
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