Nissan Pathfinder (2005 year). Instruction — part 361

TROUBLE DIAGNOSIS

MTC-79

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MTC

2005 Pathfinder

Intake Sensor Circuit

EJS003VO

COMPONENT DESCRIPTION
Intake Sensor

The intake sensor is located on the heater & cooling unit. It converts
temperature of air after it passes through the evaporator into a resis-
tance value which is then input to the front air control.

DIAGNOSTIC PROCEDURE FOR INTAKE SENSOR

SYMPTOM: Intake sensor circuit is open or shorted.

1.

CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND

1.

Disconnect intake sensor connector.

2.

Turn ignition switch ON.

3.

Check voltage between intake sensor harness connector M146
terminal 2 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 4.

2.

CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL

1.

Turn ignition switch OFF.

2.

Disconnect front air control connector.

3.

Check continuity between intake sensor harness connector
M146 terminal 1 and front air control harness connector M49 ter-
minal 13.

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness or connector.

WJIA1155E

WJIA1156E

2 - Ground

: Approx. 5V

WJIA1278E

1 - 13

: Continuity should exist.

WJIA1157E

MTC-80

TROUBLE DIAGNOSIS

2005 Pathfinder

3.

CHECK INTAKE SENSOR

Refer to

ATC-123, "Intake Sensor"

.

OK or NG

OK

>> Replace front air control. Refer to

MTC-81, "AIR CONTROL"

.

NG

>> Replace intake sensor. Refer to

MTC-82, "INTAKE SENSOR"

.

4.

CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL

1.

Turn ignition switch OFF.

2.

Disconnect front air control connector.

3.

Check continuity between intake sensor harness connector
M146 terminal 2 and front air control harness connector M49 ter-
minal 12.

4.

Check continuity between intake sensor harness connector
M146 terminal 2 and ground.

OK or NG

OK

>> Replace front air control. Refer to

MTC-81, "AIR CONTROL"

.

NG

>> Repair harness or connector.

COMPONENT INSPECTION
Intake Sensor

After disconnecting intake sensor connector, measure resistance
between terminals 1 and 2 at sensor harness side, using the table
below.

If NG, replace intake sensor.

2 - 12

: Continuity should exist.

2 - Ground

: Continuity should not exist.

WJIA1158E

Temperature

°

C (

°

F)

Resistance k

Ω

−

15 (5)

209.0

−

10 (14)

160.0

−

5 (23)

123.0

0 (32)

95.8

5 (41)

74.9

10 (50)

58.9

15 (59)

46.7

20 (68)

37.3

25 (77)

30.0

30 (86)

24.2

35 (95)

19.7

40 (104)

16.1

45 (113)

13.2

WJIA1159E

CONTROL UNIT

MTC-81

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MTC

2005 Pathfinder

CONTROL UNIT

PFP:27500

Removal and Installation

EJS003VP

AIR CONTROL
Removal

1.

Remove cluster lid C. Refer to

IP-11, "CLUSTER LID C"

.

2.

Remove the four screws securing the air control to cluster lid C.

3.

Remove the air control.

Installation

Installation is in the reverse order of removal.

WJIA1290E

MTC-82

INTAKE SENSOR

2005 Pathfinder

INTAKE SENSOR

PFP:27723

Removal and Installation

EJS003VQ

REMOVAL

1.

Remove the front kick plate. Refer to

EI-28, "KICK PLATES"

.

2.

Remove the lower dash side finisher. Refer to

EI-28, "LOWER DASH SIDE FINISHER"

.

3.

Remove the front pillar lower finisher. Refer to

EI-28, "FRONT PILLAR LOWER FINISHER"

.

4.

Remove the assist grip handle

5.

Remove the front pillar upper finisher. Refer to

EI-28, "FRONT PILLAR UPPER FINISHER"

.

6.

Remove the lower glove box. Refer to

IP-14, "LOWER INSTRUMENT PANEL RH AND GLOVE BOX"

.

7.

Remove the upper glove box (cluster lid E). Refer to

IP-10, "INSTRUMENT PANEL ASSEMBLY"

.

8.

Disconnect the intake sensor electrical connector.

NOTE:
The intake sensor is located on the top of the heater and cooling
unit assembly next to the A/C evaporator cover.

9.

Twist the intake sensor to remove the intake sensor from the
heater and cooling unit assembly.

INSTALLATION

Installation is in the reverse order of removal.

WJIA1415E

BLOWER MOTOR

MTC-83

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MTC

2005 Pathfinder

BLOWER MOTOR

PFP:27226

Components

EJS003VR

Blower Motor

Removal and Installation

EJS003VS

REMOVAL

1.

Remove the lower glove box assembly. Refer to

IP-14, "LOWER INSTRUMENT PANEL RH AND GLOVE

BOX"

.

2.

Disconnect the blower motor electrical connector.

3.

Remove the three screws and remove the blower motor.

INSTALLATION

Installation is in the reverse order of removal.

LJIA0136E

1.

Heater and cooling unit assembly

2.

Blower motor

3.

Blower motor resistor

MTC-84

IN-CABIN MICROFILTER

2005 Pathfinder

IN-CABIN MICROFILTER

PFP:27277

Removal and Installation

EJS003VT

FUNCTION

The air inside the passenger compartment is filtered by the in-cabin
microfilters when the heater or A/C controls are set on either the
recirculation or fresh mode. The two in-cabin microfilters are located
in the heater and cooling unit assembly. The rear heater and cooling
unit assembly only draws in air from the passenger compartment to
recirculate into the passenger compartment, so the rear heater and
cooling unit assembly is not equipped with in-cabin microfilters.

REPLACEMENT TIMING

Replacement of the two in-cabin microfilters is recommended on a regular interval depending on the driving
conditions. Refer to

MA-7, "PERIODIC MAINTENANCE"

. It may also be necessary to replace the two in-cabin

microfilters as part of a component replacement if the in-cabin microfilters are damaged.

REPLACEMENT PROCEDURE

1.

Open the lower glove box and press in on the sides so that it will
open completely allowing it to hang by the cord.

2.

Remove the screw and remove the in-cabin microfilter cover.

3.

Remove the in-cabin microfilters from the heater and cooling
unit housing.

4.

Insert the first new in-cabin microfilter into the heater and cool-
ing unit housing and slide it over to the right. Insert the second
new in-cabin microfilter into the heater and cooling unit housing.

NOTE:
The in-cabin microfilters are marked with air flow arrows. The
end of the microfilter with the arrow should face the rear of the
vehicle. The arrows should point downward.

LJIA0012E

WLIA0023E

LJIA0134E

LJIA0148E

IN-CABIN MICROFILTER

MTC-85

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MTC

2005 Pathfinder

5.

Install the in-cabin microfilter cover.

6.

Close the lower glove box completely.

LJIA0134E

MTC-86

HEATER & COOLING UNIT ASSEMBLY

2005 Pathfinder

HEATER & COOLING UNIT ASSEMBLY

PFP:27110

Components

EJS003VU

Heater and Cooling Unit Assembly

Removal and Installation

EJS003VV

REMOVAL

1.

Discharge the refrigerant from the A/C system. Refer to

ATC-151, "Discharging Refrigerant"

.

2.

Drain the coolant from the engine cooling system. Refer to

MA-13, "DRAINING ENGINE COOLANT"

.

3.

Disconnect the battery negative and positive terminals.

WJIA1416E

1.

High-pressure A/C pipe

2.

Low-pressure A/C pipe

3.

Expansion valve

4.

Heater core and evaporator pipes
grommet

5.

A/C drain hose grommet

6.

A/C drain hose

7.

Heater core pipe mounts

8.

Heater core pipes

9.

Heater and cooling unit assembly