Nissan Pathfinder. Manual - part 719

 

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Nissan Pathfinder. Manual - part 719

 

 

PTC HEATER

HAC-137

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

3. Check continuity between PTC heater connector and ground.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-49, "Intermittent Incident"

.

NO

>> Replace or repair harness.

M118

1

E11

5

Yes

3

E12

PTC heater connector

Terminal

Ground

Continuity 

M118

1

No

3

HAC-138

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

REAR BLOWER MOTOR

REAR BLOWER MOTOR

Diagnosis Procedure

INFOID:0000000009176877

Regarding Wiring Diagram information, refer to 

HAC-49, "Wiring Diagram"

.

REAR BLOWER MOTOR 1

1.

CHECK FUSE

Check 20A fuse [No. 70, located in the fuse block (J/B)].
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the blown fuse after repairing the affected circuit.

2.

CHECK POWER SUPPLY FOR BLOWER MOTOR

1. Turn ignition switch ON.

2. Check voltage between rear blower motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 7.

3.

CHECK POWER SUPPLY FOR REAR BLOWER MOTOR RESISTOR 1

Check voltage between rear blower motor resistor 1 harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 8.

4.

CHECK BLOWER MOTOR CONTROL SIGNAL

1. Turn mode control to VENT.

2. Turn fan control to 1st speed.

3. Check voltage between rear blower motor resistor 1 harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO-1 >> Less than approximately 2.5 V: GO TO 9.

NO-2 >> More than approximately 10 V: Replace auto amp.

5.

CHECK REAR BLOWER MOTOR RESISTOR 1 GROUND CIRCUIT

1. Disconnect rear blower motor resistor 1 connector.

(+)

(

−)

Voltage

(Approx.)

Rear blower motor

Connector

Terminal

M107

1

Ground

Battery voltage

(+)

(

−)

Voltage

(Approx.)

Rear blower motor resistor 1

Connector

Terminal

M104

1

Ground

Battery voltage

(+)

(

−)

Voltage

(Approx.)

Rear blower motor resistor 1

Connector

Terminal

M104

2

Ground

2.5 V

REAR BLOWER MOTOR

HAC-139

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

2. Check continuity between rear blower motor resistor 1 harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair harness or connector.

6.

CHECK BLOWER MOTOR FEEDBACK SIGNAL

1. Reconnect rear blower motor resistor 1 connector.

2. Turn ignition switch ON.

3. Turn fan control to 1st speed.

4. Check voltage between auto amp. harness connector and ground.

Is the inspection result normal?

YES

>> Replace auto amp.

NO

>> Repair harness or connector.

7.

CHECK POWER SUPPLY OF BLOWER RELAY

1. Turn ignition switch OFF.

2. Remove blower relay.

3. Turn ignition switch ON.

4. Check voltage between rear blower relay connector terminals and ground.

Is the inspection result normal

YES

>> Check rear blower motor relay. Refer to 

HAC-142, "Component Inspection (Rear Blower Motor

Relay)"

.

NO

>> Repair harness or connector.

8.

CHECK CIRCUIT CONTINUITY BETWEEN BLOWER MOTOR AND REAR BLOWER MOTOR RESISTOR

1

1. Turn ignition switch OFF.

2. Disconnect rear blower motor resistor 1 connector.

3. Check continuity between blower motor harness connector and rear blower motor resistor 1 harness con-

nector.

Is the inspection result normal?

Rear blower motor resistor 1

—

Continuity

Connector

Terminal

M104

3

Ground

Yes

(+)

(

−)

Condition

Voltage

(Approx.)

Auto amp.

Connector

Terminal

M50

34

Ground

Blower speed: 1st

(Blower motor operating)

10 V

(+)

(

−)

Voltage

(Approx.)

Rear blower relay

Connector

Terminal

M108

1

Ground

Battery voltage

3

6

Blower motor

Rear blower motor resistor 1

Continuity

Connector

Terminal

Connector

Terminal

M107

2

M104

1

Yes

HAC-140

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

REAR BLOWER MOTOR

YES

>> Replace blower motor.

NO

>> Repair harness or connector.

9.

CHECK REAR BLOWER MOTOR RESISTOR 1

Check rear blower motor resistor 1. Refer to 

HAC-142, "Component Inspection (Rear Blower Motor Relay)"

.

Is the inspection result normal?

YES

>> Replace auto amp.

NO

>> Replace rear blower motor resistor 1.

REAR BLOWER MOTOR 2

1.

CHECK FUSE

Check 20A fuse [Nos. 71, located in the fuse block (J/B)].
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace fuse after repairing the affected circuit.

2.

CHECK POWER SUPPLY FOR BLOWER MOTOR

1. Turn ignition switch ON.

2. Check voltage between rear blower motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 7.

3.

CHECK POWER SUPPLY FOR REAR BLOWER MOTOR RESISTOR 2

Check voltage between rear blower motor resistor 2 harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 8.

4.

CHECK BLOWER MOTOR CONTROL SIGNAL

1. Turn mode control to VENT.

2. Turn fan control to 1st speed.

3. Check voltage between rear blower motor resistor 2 harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO-1 >> Less than approximately 2.5 V: GO TO 9.

NO-2 >> More than approximately 10 V: Replace auto amp.

(+)

(

−)

Voltage

(Approx.)

Rear blower motor

Connector

Terminal

B134

1

Ground

Battery voltage

(+)

(

−)

Voltage

(Approx.)

Rear blower motor resistor 2

Connector

Terminal

B133

1

Ground

Battery voltage

(+)

(

−)

Voltage

(Approx.)

Rear blower motor resistor 2

Connector

Terminal

B133

2

Ground

2.5 V

 

 

 

 

 

 

 

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