Nissan Pathfinder (2006 year). Manual - part 52

TROUBLE DIAGNOSIS

ATC-81

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ATC

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 

ATC-81, "Front Blower Motor"

 .

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.

WJIA1263E

LJIA0068E

WJIA1265E

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

ATC-36, "SYMPTOM TABLE"

WJIA1266E

TROUBLE DIAGNOSIS

ATC-83

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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

>> Refer to 

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 

ATC-127, "FRONT AIR CONTROL"

 .

WJIA1280E

ATC-84

TROUBLE DIAGNOSIS

2006 Pathfinder

3. 

CHECK REAR BLOWER SWITCH (REAR)

Refer to 

ATC-91, "Rear Air Control"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Replace rear blower switch (rear). Refer to 

ATC-127, "REAR AIR CONTROL"

 .

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.

WJIA1281E

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

.

ATC-55, "Operational Check 

(Rear)"

 .

*2

ATC-85, "Trouble Diagnosis Proce-
dure For Rear Blower Motor (1 - 4 
Speed)"

*3

ATC-36, "SYMPTOM TABLE"

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 

PG-84, "FUSE AND FUS-

IBLE LINK BOX"

 .

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

Refer to 

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.

WJIA1120E

TROUBLE DIAGNOSIS

ATC-87

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ATC

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 

ATC-127, "FRONT

AIR CONTROL"

 .

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 

ATC-92, "Rear Blower Motor"

 .

OK or NG

OK

>> Repair harness between the rear blower motor and the fuse.

NG

>> Replace rear blower motor. refer to 

ATC-133, "REAR BLOWER MOTOR"

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

WJIA1289E

1 - 39

: Continuity should exist.

WJIA1123E

3, 6 - Ground

: Battery voltage should 
exist.

WJIA1683E

ATC-88

TROUBLE DIAGNOSIS

2006 Pathfinder

11. 

CHECK REAR BLOWER MOTOR

Refer to 

ATC-92, "Rear Blower Motor"

 .

OK or NG

OK

>> GO TO 12.

NG

>> Replace rear blower motor. Refer to 

ATC-133, "REAR BLOWER MOTOR"

 .

12. 

CHECK REAR BLOWER SWITCH (FRONT)

Refer to 

ATC-91, "Rear Blower Switch (Front)"

 .

OK or NG

OK

>> GO TO 15.

NG

>> Replace rear blower switch (front). Refer to 

ATC-127, "FRONT AIR CONTROL"

 .

13. 

CHECK REAR BLOWER MOTOR RESISTOR

Refer to 

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