Infiniti G35 (V35) Sedan. Manual - part 779

 

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Infiniti G35 (V35) Sedan. Manual - part 779

 

 

HAC-88

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

BLOWER MOTOR

7.

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 M109 terminal 2 and unified meter and A/C
amp. harness connector M66 terminal 38.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair harness or connector.

8.

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.

4.

Change fan speed from Lo to Hi, and check duty ratios between blower motor harness connector M109
terminal 2 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.

9.

CHECK POWER VOLTAGE OF BLOWER FAN MOTOR

1.

Turn ignition switch OFF.

2.

Remove blower fan motor relay. Refer to 

PG-93, "Fuse, Connector and Terminal Arrangement"

.

3.

Turn ignition switch ON.

4.

Check the voltage between blower fan motor relay fuse block terminals 1, 3 and body ground. Refer to

PG-91, "Description"

 for relay terminal assignment.

Is the inspection result normal?

(+)

(

)

Continuity

blower motor

Unified meter and A/C amp.

Connector

Terminal

Connector

Terminal

M109

2

M66

38

Continuity should exist

JSIIA0068GB

(+)

(

)

Voltage

Blower fan motor relay

 Fuse block terminal

1

Ground

Battery voltage

3

BLOWER MOTOR

HAC-89

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

YES

>> GO TO 11.

NO

>> GO TO 10.

10.

CHECK IGNITION SWITCH

Check ignition switch.

Is the inspection result normal?

YES

>> Repair harness or connector.

NG

>> Replace ignition switch.

11.

CHECK BLOWER FAN MOTOR RELAY

1.

Turn ignition switch OFF.

2.

Install blower fan motor relay. Refer to 

PG-93, "Fuse, Connector and Terminal Arrangement"

.

3.

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

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> Replace blower fan motor relay.

12.

CHECK FUSE

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

PG-93, "Fuse, Connector and Termi-

nal Arrangement"

.

Is the inspection result normal?

YES

>> Repair harness or connector.

NG

>> Replace fuse.

WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL 
SYSTEM : Component Inspection

INFOID:0000000000959947

Confirm smooth rotation of the blower motor (1).

JSIIA0044ZZ

HAC-90

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

MAGNET CLUTCH

MAGNET CLUTCH

Description

INFOID:0000000000959948

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

Component Function Check

INFOID:0000000000959949

1.

CONFIRM SYMPTOM BY PERFORMING THE FOLLOWING OPERATIONAL CHECK

1.

Press AUTO switch and A/C switch.

2.

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

Does the magnet clutch operate?

YES

>> END.

NO

>> Go to Diagnosis Procedure. Refer to 

HAC-90, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000000959950

1.

PERFORM SELF-DIAGNOSIS STEP-2

Perform self-diagnosis STEP-2. Refer to 

HAC-44, "WITHOUT LEFT AND RIGHT VENTILATION TEMPERA-

TURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"

 (Without left and right ventilation tempera-

ture separately control system) or 

HAC-50, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE

SEPARATELY CONTROL SYSTEM : Diagnosis Description"

 (With left and right ventilation temperature sepa-

rately control system), see No. 1 to 2.

Is there any malfunction displayed?

YES

>> Go to appropriate malfunctioning sensor circuit. Refer to 

HAC-44, "WITHOUT LEFT AND RIGHT

VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"

(Without left and right ventilation temperature separately control system) or 

HAC-50, "WITH LEFT

AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis
Description"

 (With left and right ventilation temperature separately control system), see to No. 11.

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS STEP-4

Perform self-diagnosis STEP-4. Refer to 

HAC-44, "WITHOUT LEFT AND RIGHT VENTILATION TEMPERA-

TURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"

 (Without left and right ventilation tempera-

ture separately control system) or 

HAC-50, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE

SEPARATELY CONTROL SYSTEM : Diagnosis Description"

 (With left and right ventilation temperature sepa-

rately control system), see No. 1 to 5.

Is it operated normally?

YES

>> END.

NO

>> GO TO 3.

3.

PERFORM AUTO ACTIVE TEST

Refer to 

PCS-10, "Diagnosis Description"

.

Does the magnet clutch operate?

YES

>> •

WITH CONSULT-III: GO TO 6.

WITHOUT CONSULT-III: GO TO 7.

NO

>> Check 10A fuse (No. 49, located in IPDM E/R), and GO TO 4.

4.

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 E7 terminal 48 and compressor harness connec-
tor F44 terminal 1.

MAGNET CLUTCH

HAC-91

< COMPONENT 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 5.

NO

>> Repair harness or connector.

5.

CHECK MAGNET CLUTCH CIRCUIT

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

Is the inspection result normal?

YES

>> 1.

Replace IPDM E/R.

2.

Refer to self-diagnosis procedure 

HAC-44, "WITHOUT LEFT AND RIGHT VENTILATION

TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"

 (Without left

and right ventilation temperature separately control system) or 

HAC-50, "WITH LEFT AND

RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis
Description"

 (With left and right ventilation temperature separately control system) and per-

form self-diagnosis STEP-4. Confirm that magnet clutch operation normal.

NO

>> 1.

Replace compressor.

2.

Refer to self-diagnosis procedure 

HAC-44, "WITHOUT LEFT AND RIGHT VENTILATION

TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"

 (Without left

and right ventilation temperature separately control system) or 

HAC-50, "WITH LEFT AND

RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis
Description"

 (With left and right ventilation temperature separately control system) and per-

form self-diagnosis STEP-4. Confirm that magnet clutch operation normal.

6.

CHECK BCM INPUT (COMPRESSOR ON) SIGNAL

Check compressor ON/OFF signal. Refer to 

HAC-49, "WITHOUT LEFT AND RIGHT VENTILATION TEM-

PERATURE SEPARATELY CONTROL SYSTEM : CONSULT-III Function"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> GO TO 7.

7.

CHECK REFRIGERANT PRESSURE SENSOR

WITH CONSULT-III

1.

Start the engine.

2.

Check voltage of refrigerant pressure sensor. Refer to 

EC-484, "Reference Value"

.

WITHOUT CONSULT-III

1.

Start the engine.

2.

Check voltage between ECM harness connector M107 terminal 105 and ground.

Is the inspection result normal?

YES

>> •

WITH CONSULT-III: GO TO 8.

WITHOUT CONSULT-III: Repair harness or connector.

NO

>> Refer to 

EC-479, "Diagnosis Procedure"

.

(+)

(

)

Continuity

IPDM E/R

Compressor

Connector

Terminal

Connector

Terminal

E7

48

F44

1

Continuity should exist

A/C SW ON

: AIR COND SIG ON

A/C SW OFF

: AIR COND SIG OFF

(+)

(

)

Condition

Voltage

ECM

 connector

Terminal

M107

105

Ground

A/C switch: ON

(Blower motor operates.)

Approx. 1.0 - 4.0 V

 

 

 

 

 

 

 

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