Infiniti FX35, FX50 (S51). Manual - part 1171

 

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Infiniti FX35, FX50 (S51). Manual - part 1171

 

 

BLOWER MOTOR

HAC-81

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 6.

3.

CHECK BLOWER MOTOR GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between blower motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK CIRCUIT CONTINUITY BETWEEN BLOWER MOTOR AND UNIFIED METER AND A/C AMP.

1.

Disconnect unified meter and A/C amp. connector.

2.

Check continuity between blower motor harness connector and unified meter and A/C amp. harness con-
nector.

3.

Check continuity between blower motor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair harness or connector.

5.

CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL

1.

Reconnect blower motor connector and unified meter and A/C amp. connector.

2.

Turn ignition switch ON.

3.

Set MODE switch to VENT position.

(+)

(

)

Voltage

Blower motor

Connector

Terminal

M109

1

Ground

Battery voltage

Blower motor

Continuity

Connector

Terminal

M109

3

Ground

Existed

Blower motor

Unified meter and A/C amp.

Continuity

Connector

Terminal

Connector

Terminal

M109

2

M66

38

Existed

Blower motor

Continuity

Connector

Terminal

M109

2

ground

Not existed

HAC-82

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

BLOWER MOTOR

4.

Change fan speed from Lo to Hi, and check duty ratios between blower motor harness connector and
ground by using an oscilloscope. Normal terminal 2 drive signal duty ratios are shown in the table below.

Is the inspection result normal?

YES

>> Replace blower motor after confirming the fan air flow does not change.

NO

>> Replace unified meter and A/C amp.

6.

CHECK POWER VOLTAGE OF BLOWER RELAY

1.

Turn ignition switch OFF.

2.

Remove blower relay. Refer to 

PG-156, "Fuse, Connector and Terminal Arrangement"

.

3.

Turn ignition switch ON.

4.

Check the voltage between blower relay fuse block terminals and ground. Refer to 

PG-154, "Description"

for relay terminal assignment.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Check ignition power supply circuit. Refer to 

PG-81, "Wiring Diagram - IGNITION POWER SUP-

PLY -"

.

7.

CHECK BLOWER RELAY

1.

Turn ignition switch OFF.

2.

Install blower relay. Refer to 

PG-156, "Fuse, Connector and Terminal Arrangement"

.

3.

Check operation sound of the blower relay after switching ignition switch ON.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace blower relay.

8.

CHECK FUSE

Check fuse 15A [Nos. 21 and 22, located in the fuse block (J/B)]. Refer to 

PG-156, "Fuse, Connector and Ter-

minal Arrangement"

.

Is the inspection result normal?

YES

>> Repair harness or connector.

NO

>> Be sure to eliminate cause of malfunction before installing new fuse.

JSIIA0068GB

(+)

(

)

Voltage

Blower relay

1

Ground

Battery voltage

3

BLOWER MOTOR

HAC-83

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Component Inspection

INFOID:0000000005246269

1.

CHECK BLOWER MOTOR

1.

Remove blower motor (1). Refer to 

HA-57, "Exploded View"

.

2.

Confirm smooth rotation of the blower motor.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace blower motor.

JSIIA1074ZZ

HAC-84

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

MAGNET CLUTCH

MAGNET CLUTCH

Description

INFOID:0000000005246270

Magnet clutch drives a compressor, by a signal of IPDM E/R.

Component Function Check

INFOID:0000000005246271

1.

CONFIRM SYMPTOM BY PERFORMING THE FOLLOWING OPERATIONAL CHECK

1.

Press AUTO switch.

2.

Display should indicate AUTO. Confirm that the magnet clutch engages (sound or visual inspection). (Dis-
charge air and blower speed depend on ambient, in-vehicle and set temperatures.)

Does the magnet clutch operate?

YES

>> INSPECTION END

NO

>> Go to Diagnosis Procedure. Refer to 

HAC-84, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005246272

1.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis function. Refer to 

HAC-57, "WITHOUT ACCS : Diagnosis Description"

 (WITHOUT

ACCS) or 

HAC-62, "WITH ACCS : Diagnosis Description"

 (WITH ACCS).

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

PERFORM IPDM E/R AUTO ACTIVE TEST

Perform IPDM E/R auto active test. Refer t

PCS-11, "Diagnosis Description"

.

Does the magnet clutch operate?

YES-1 >>

WITH CONSULT-III: GO TO 5.

YES-2 >>

WITHOUT CONSULT-III: GO TO 6.

NO

>> Check 10A fuse (No. 49, located in IPDM E/R), and GO TO 3.

3.

CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND COMPRESSOR

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R connector and compressor connector.

3.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair harness or connector.

4.

CHECK MAGNET CLUTCH CIRCUIT

Check for operation sound when applying battery voltage direct current to terminal.

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> Replace compressor.

5.

CHECK ECM INPUT SIGNAL-1

Check A/C switch signal in “Data monitor”. Refer to 

HAC-62, "WITHOUT ACCS : CONSULT-III Function"

(WITHOUT ACCS) or 

HAC-67, "WITH ACCS : CONSULT-III Function"

 (WITH ACCS).

IPDM E/R

Compressor

Continuity

Connector

Terminal

Connector

Terminal

E7

48

F43

1

Existed

A/C SWITCH ON

: AIR COND SIG On

A/C SWITCH OFF

: AIR COND SIG Off

 

 

 

 

 

 

 

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