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Infiniti G35 (V35) Sedan. Manual - part 770

HAC-52

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

DIAGNOSIS SYSTEM (AUTO AMP.)

Does code No. 20 appear on the display?

YES

>> GO TO 3.

>> GO TO 11.

STEP-3: MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED

Turn temperature control dial (driver side) clockwise.

Does code No. 30 appear on the display?

YES

>> GO TO 4.

>> GO TO 12.

STEP-4: OPERATION OF EACH DOOR MOTOR IS CHECKED

Turn temperature control dial (driver side) clockwise.

Press

(DEF) switch. Code No. of each door motor test is

indicated on the display.

>> GO TO 5.

CHECK ACTUATORS

Refer to the following chart and check discharge air flow, air temperature, blower motor duty ratio and com-
pressor operation.
Without rear ventilation

SJIA1778E

SJIA1779E

SJIA1780E

JSIIA0111GB

DIAGNOSIS SYSTEM (AUTO AMP.)

HAC-53

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

HAC

With rear ventilation

Checks must be made visually, by listening the sound, or by touching air outlets with hand, etc. for improper
operation.
Is this inspection result normal?

YES

>> GO TO 6.

NO-1

>> Air outlet does not change. Go to Mode Door Motor Circuit. Refer to

HAC-69, "Diagnosis Proce-

dure"

NO-2

>> Intake door does not change. Go to Intake Door Motor Circuit. Refer to

HAC-80, "Diagnosis Pro-

cedure"

NO-3

>> Discharge air temperature does not change. Go to Air Mix Door Motor Circuit. Refer to

HAC-75,

"WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM :
Diagnosis Procedure"

NO-4

>> Blower motor operation is malfunctioning. Go to Blower Motor Circuit. Refer to

HAC-86, "WITH

LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diag-
nosis Procedure"

NO-5

>> Magnet clutch does not engage.Go to Magnet Clutch Circuit. Refer to

HAC-90, "Diagnosis Proce-

dure"

STEP-5: TEMPERATURE OF EACH SENSOR IS CHECKED

Turn temperature control dial (driver side) clockwise.

Code No. 51 appears on the display.

>> GO TO 7.

CHECK AMBIENT SENSOR

JSIIA0060GB

Code No.

Mode door position

VENT

B/L 1

B/L 2

FOOT

D/F

DEF

Intake door position

REC

20% FRE

FRE

Air mix door position

FULL COOL

FULL HOT

Blower motor duty ratio

37%

91%

65%

91%

Compressor

OFF

Electronic control valve
(ECV) duty ratio

100%

50%

100%

HAC-54

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

DIAGNOSIS SYSTEM (AUTO AMP.)

Press

(DEF) switch one time. Temperature detected by ambient

sensor is indicated on the display.
NOTE:
If the temperature indicated on the display greatly differs from the
actual temperature, check sensor circuit first, and then check sensor.
Is this inspection result normal?

YES

>> GO TO 8.

>> Go to Ambient Sensor Circuit. Refer to

HAC-93, "Diag-

nosis Procedure"

CHECK IN-VEHICLE SENSOR

Press

(DEF) switch for the second time. Temperature detected

by in-vehicle sensor is indicated on the display.
NOTE:
If the temperature indicated on the display greatly differs from the
actual temperature, check sensor circuit first, and then check sensor.

Is this inspection result normal?

YES

>> GO TO 9.

>> Go to In-vehicle Sensor Circuit. Refer to

HAC-97, "Diag-

nosis Procedure"

CHECK INTAKE SENSOR

Press

(DEF) switch for the third time. Temperature detected by

intake sensor is indicated on the display.
NOTE:
If the temperature indicated on the display greatly differs from the
actual temperature, check sensor circuit first, and then check sensor.

Is this inspection result normal?

YES

>> GO TO 10.

>> Go to Intake Sensor Circuit. Refer to

HAC-102, "Diagno-

sis Procedure"

10.

CHECK CAN COMMUNICATION ERROR

Press intake switch.

CAN communication error between each unit that uses the uni-
fied meter and A/C amp. can be detected as self-diagnosis
results. (If plural errors occur, the display of each error will blink
twice for 0.5 second intervals.)

Is the inspection result normal?

YES

>> INSPECTION END

Go to CAN communication. Refer to

MWI-40,

"Diagnosis Procedure"

• Unified meter and A/C amp. - AV control unit

11.

CHECK MALFUNCTIONING SENSOR AND DOOR MOTOR

Refer to the following chart for malfunctioning code No.
(If two or more sensors and door motors malfunction, corresponding code Nos. indicates 1 second each.)
(If two door motors malfunction, corresponding code Nos. indicates 0.5 second each.)

PJIA0151E

PJIA0152E

PJIA0153E

JSIIA0138GB

DIAGNOSIS SYSTEM (AUTO AMP.)

HAC-55

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

HAC

*: Perform self-diagnosis STEP-2 under sunshine.
When performing indoors, aim a light (more than 60 W) at sunload sensor, otherwise code No. 25 will indicate
despite that sunload sensor is functioning properly.

>> INSPECTION END

12.

CHECK MALFUNCTIONING DOOR MOTOR POSITION SWITCH

Mode and/or intake door motor PBR(s) is/are malfunctioning.

(If two or more mode or intake door motors malfunction, corresponding code Nos. indicates 1 second each.)
*1: If mode door motor harness connector is disconnected, the following display pattern will appear.
31

→

Return to 31

*2: If intake door motor harness connector is disconnected, the following display pattern will appear.
37

→

Return to 37

>> INSPECTION END

WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL
SYSTEM : CONSULT-III Function

INFOID:0000000000959920

Code No.

Malfunctioning sensor and door motor (Including circuits)

Reference page

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