Nissan Pathfinder. Manual - part 718

MAGNET CLUTCH

HAC-133

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

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MAGNET CLUTCH

Component Function Check

INFOID:0000000009176870

1.

CHECK MAGNET CLUTCH OPERATION

Perform auto active test of IPDM E/R. Refer to 

PCS-8, "Diagnosis Description"

.

Does it operate normally?

YES

>> Inspection End.

NO

>> Refer to 

HAC-133, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009176871

Regarding Wiring Diagram information, refer to 

HAC-49, "Wiring Diagram"

.

1.

CHECK FUSE

1. Turn ignition switch OFF.

2. Check 10A fuse (No. 53, located in IPDM E/R). 

NOTE:

Refer to 

PG-85, "IPDM E/R Terminal Arrangement"

. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

2.

CHECK MAGNET CLUTCH POWER SUPPLY CIRCUIT

1. Disconnect compressor connector and IPDM E/R connector.

2. Check continuity between compressor harness connector and IPDM E/R harness connector. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector. 

3.

CHECK MAGNET CLUTCH GROUND CIRCUIT

1. Disconnect compressor connector.

2. Check continuity between compressor harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector. 

4.

CHECK MAGNET CLUTCH

Directly apply battery voltage to the magnet clutch. Check operation visually and by sound. 
Does it operate normally?

YES

>> Replace IPDM E/R. Refer to 

PCS-32, "Removal and Installation"

.

NO

>> Replace magnet clutch. Refer to 

HA-31, "MAGNET CLUTCH : Removal and Installation of Com-

pressor Clutch"

.

Compressor

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

F3

1

F19

56

Yes

Compressor

Continuity

Connector

Terminal

F3

2

Ground

Yes

HAC-134

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

PTC HEATER RELAY

PTC HEATER RELAY

Description

INFOID:0000000009176872

Power is supplied to the PTC heater with A/C auto amp. control.

Component Function Check

INFOID:0000000009176873

1.

 CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT

Check that an operation noise of PTC heater relay (located in relay box) can be heard when operating the rear

air conditioning system in heat mode.
Is the inspection result normal?

YES

>> PTC heater relay power supply circuit is OK.

NO

>> Refer to 

HAC-134, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009176874

Regarding Wiring Diagram information, refer to 

HAC-49, "Wiring Diagram"

.

1.

 CHECK PTC HEATER RELAY GROUND CIRCUIT

1. Turn ignition switch ON.

2. Check voltage between A/C auto amp. connector and ground.

Is the inspection result normal?

YES

>> Replace A/C auto amp. Refer to 

HAC-157, "Removal and Installation"

.

NO

>> GO TO 2.

2.

 CHECK HARNESS CONTINUITY

1. Turn ignition switch OFF.

2. Disconnect A/C auto amp. and PTC heater relay connector.

3. Check continuity between A/C auto amp. connector and PTC heater relay connector.

4. Check continuity between A/C auto amp. connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

 CHECK PTC HEATER RELAY

Terminals

Voltage (V)

(Approx.)

(+)

(–)

A/C auto amp.

Terminal 

M50

19

Ground

Battery voltage

39

A/C auto amp. 

connector

Terminal

PTC heater relay 

connector

Terminal

Continuity 

M50

19

E11

2

Yes

39

E12

A/C auto amp. connec-

tor

Terminal

Ground

Continuity 

M50

19

No

39

PTC HEATER RELAY

HAC-135

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

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Check PTC heater relay. Refer to 

HAC-135, "Component Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-49, "Intermittent Incident"

.

NO

>> Replace PTC heater relay.

Component Inspection

INFOID:0000000009176875

1.

CHECK PTC HEATER RELAY

1. Turn ignition switch OFF. 

2. Remove PTC heater relay. 

3. Check continuity between PTC heater relay terminal 3 and 5

when voltage is supplied between terminal 1 and 2. 

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace blower relay.

Terminal

Voltage

Continuity

3

5

ON

Yes

OFF

No

JSIIA1551ZZ

HAC-136

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONING]

PTC HEATER

PTC HEATER

Diagnosis Procedure

INFOID:0000000009176876

Regarding Wiring Diagram information, refer to 

HAC-49, "Wiring Diagram"

.

1.

CHECK FUSE

1. Turn ignition switch OFF.

2. Check 30A fuse [No. 59 and 60, located in relay box]. 

NOTE:

Refer to 

PG-82, "Terminal Arrangement"

. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

2.

 CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch ON.

2. Check voltage between PTC heater connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

 CHECK GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect PTC heater connector.

3. Check continuity between PTC heater connector and ground.

Is the inspection result normal?

YES

>> Replace PTC heater. Refer to 

VTL-20, "REAR BLOWER MOTOR 1 UNIT ASSEMBLY : Removal

and Installation"

.

NO

>> Repair or replace harness.

4.

 CHECK HARNESS CONTINUITY

1. Disconnect PTC relay connectors.

2. Check continuity between PTC heater connector and PTC relay connector.

Terminals

Condition of rear 

window

 defogger switch

Voltage (V)

(Approx.)

(+)

(–)

PTC heater

 connector

Terminal 

M118

1

Ground

ON

Battery voltage

OFF

0

3

ON

Battery voltage

OFF

0

Rear window defogger connector

Terminal

Ground

Continuity 

M117

2

Yes

4

PTC heater connec-

tor

Terminal

PTC heater 

relay connec-

tor

Terminal

Continuity