Infiniti FX35, FX50 (S51). Manual - part 1172

 

  Index      Infiniti     Infiniti FX35, FX50 (S51) - service repair manual 2010 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  1170  1171  1172  1173   ..

 

 

Infiniti FX35, FX50 (S51). Manual - part 1172

 

 

MAGNET CLUTCH

HAC-85

< 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 8.

NO

>> GO TO 6.

6.

CHECK REFRIGERANT PRESSURE SENSOR

WITH CONSULT-III

1.

Start the engine.

2.

Check voltage of refrigerant pressure sensor in “Data monitor”. Refer to 

HAC-104, "VQ35HR : Reference

Value"

 (VQ35HR) or 

HAC-121, "VK50VE : Reference Value"

 (VK50VE).

WITHOUT CONSULT-III

1.

Start the engine.

2.

Check voltage between ECM harness connector and ground.

VQ35HR

VK50VE

Is the inspection result normal?

YES

>> •

WITH CONSULT-III: GO TO 7.

WITHOUT CONSULT-III: Repair harness or connector.

NO

>> Refer to 

EC-494, "Diagnosis Procedure"

 (VQ35HR) or 

EC-1127, "Diagnosis Procedure"

(VK50VE).

7.

CHECK ECM INPUT SIGNAL-2

Check blower fan motor 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).

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair harness or connector.

8.

CHECK CAN COMMUNICATION

Check CAN communication. Refer to 

LAN-20, "Trouble Diagnosis Flow Chart"

.

• ECM – IPDM E/R
• ECM – Unified meter and A/C amp.

Is the inspection result normal?

YES

>> Replace ECM.

NO

>> Repair or replace malfunctioning part(s).

(+)

(

)

Condition

Voltage

ECM

 connector

Terminal

M107

105

Ground

A/C switch: ON

(Blower motor operates.)

Approx. 1.0 - 4.0 V

(+)

(

)

Condition

Voltage

ECM

 connector

Terminal

F111

90

Ground

A/C switch: ON

(Blower motor operates.)

Approx. 1.0 - 4.0 V

FAN SWITCH ON

: HEATER FAN SW On

FAN SWITCH OFF

: HEATER FAN SW Off

HAC-86

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

ECV (ELECTRICAL CONTROL VALVE)

ECV (ELECTRICAL CONTROL VALVE)

Description

INFOID:0000000005246273

The ECV (electrical control valve) is installed on the compressor and controls it for emitting appropriate
amount of refrigerant when necessary. 

Diagnosis Procedure

INFOID:0000000005246274

1.

CHECK FUSE

Check 10A fuse [No. 3, located in the fuse block (J/B)]. 
NOTE:
Refer to 

PG-158, "Fuse, Connector and Terminal Arrangement"

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace the fuse after repairing the applicable circuit. 

2.

CHECK ECV POWER SUPPLY CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect the ECV connector.

3.

Turn the ignition switch ON.

4.

Check voltage between the ECV harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the harnesses or connectors.

3.

CHECK ECV CONTROL SIGNAL

1.

Turn the ignition switch OFF.

2.

Connect the ECV connector.

3.

Perform the self-diagnosis STEP-4 (Code No. 45). Refer to 

HAC-57, "WITHOUT ACCS : Diagnosis

Description"

 (WITHOUT ACCS) or 

HAC-62, "WITH ACCS : Diagnosis Description"

 (WITH ACCS).

4.

Check output waveform between the unified meter and A/C amp. harness connector and ground with the
oscilloscope. 

Is the inspection result normal?

YES

>> Replace the compressor.

NO

>> GO TO 4.

4.

CHECK CONTINUITY BETWEEN ECV AND UNIFIED METER AND A/C AMP.

1.

Turn the ignition switch OFF.

(+)

(

)

Voltage

ECV

Connector

Terminal

F44

2

Ground

Battery voltage

(+)

(

)

Condition

Output waveform

Unified meter and A/C amp.

Connector

Terminal

M67

65

Ground

• Ignition switch ON
• Self-diagnosis. STEP-4

(Code No. 45)

Duty ratio: approx. 50 %

SJIA1607E

ECV (ELECTRICAL CONTROL VALVE)

HAC-87

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

2.

Disconnect the ECV connector.

3.

Disconnect the unified meter and A/C amp. connector. 

4.

Check continuity between the ECV harness connector and unified meter and A/C amp. harness connec-
tor. 

5.

Check for continuity between the ECV harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair the harnesses or connectors.

5.

CHECK ECV

Check continuity between the ECV connector terminals. 

Is the inspection result normal?

YES

>> Replace the unified meter and A/C amp.

NO

>> Replace the compressor.

ECV

Unified meter and A/C amp.

Continuity

Connector

Terminal

Connector

Terminal

F44

3

M67

65

Existed

ECV

Continuity

Connector

Terminal

F44

3

Ground

Not existed

ECV

Continuity

Terminal

Terminal

2

3

Existed

HAC-88

< DTC/CIRCUIT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AMBIENT SENSOR

AMBIENT SENSOR

Description

INFOID:0000000005246275

COMPONENT DESCRIPTION

Ambient Sensor

The ambient sensor (1) is attached on hood lock stay assembly. It
detects ambient temperature and converts it into a resistance value
which is then input into the unified meter and A/C amp.

AMBIENT TEMPERATURE INPUT PROCESS

The unified meter and A/C amp. equips a processing circuit for the ambient sensor input. However, when the
temperature detected by the ambient sensor increases quickly, the processing circuit retards the unified meter
and A/C amp. function. It only allows the unified meter and A/C amp. to recognize an ambient temperature
increase of 0.33

°

C (0.6

°

F) per 100 seconds.

As an example, consider stopping for a few minutes after high speed driving. Although the actual ambient tem-
perature has not changed, the temperature detected by the ambient sensor increases. This is because the
heat from the engine compartment can radiate to the front bumper area, location of the ambient sensor.

Component Function Check

INFOID:0000000005246276

1.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis function STEP-2. Refer to 

HAC-57, "WITHOUT ACCS : Diagnosis Description"

 (WITH-

OUT ACCS) or 

HAC-62, "WITH ACCS : Diagnosis Description"

 (WITH ACCS).

21 or 

21 is displayed.

YES

>> Go to Diagnosis Procedure. Refer to 

HAC-88, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005246277

1.

CHECK VOLTAGE BETWEEN AMBIENT SENSOR AND GROUND

1.

Disconnect ambient sensor connector.

2.

Turn ignition switch ON.

3.

Check voltage between ambient sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND UNIFIED METER AND A/C AMP. 

1.

Turn ignition switch OFF.

2.

Disconnect unified meter and A/C amp. connector.

3.

Check continuity between ambient sensor harness connector and unified meter and A/C amp. harness
connector.

JSIIA1293ZZ

(+)

(

)

Voltage

Ambient sensor

Connector

Terminal

E76

1

Ground

Approx. 5 V

 

 

 

 

 

 

 

Content   ..  1170  1171  1172  1173   ..