Infiniti G35 (V35) Sedan. Manual — part 769
HAC-48
< 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 the inspection result normal?
YES
>> GO TO 8.
NO
>> Go to Ambient Sensor Circuit. Refer to
.
8.
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 the inspection result normal?
YES
>> GO TO 9.
NO
>> Go to In-vehicle Sensor Circuit. Refer to
.
9.
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 the inspection result normal?
YES
>> GO TO 10.
NO
>> Go to Intake Sensor Circuit. Refer to
10.
CHECK CAN COMMUNICATION ERROR
1.
Press intake switch.
2.
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
NO
>>
Go to CAN communication. Refer to
.
• 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 motor malfunction, corresponding code Nos. indicates 1 second each.)
PJIA0151E
PJIA0152E
PJIA0153E
JSIIA0138GB
Code No.
Malfunctioning sensor and door motor (Including circuits)
Reference page
21 /
−
21
Ambient sensor
22 /
−
22
In-vehicle sensor
DIAGNOSIS SYSTEM (AUTO AMP.)
HAC-49
< FUNCTION DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
*: 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
→
32
→
Return to 31
*2: If intake door motor harness connector is disconnected, the following display pattern will appear.
37
→
38
→
39
→
Return to 37
>> INSPECTION END
WITHOUT LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CON-
TROL SYSTEM : CONSULT-III Function
INFOID:0000000000959918
CONSULT-III APPLICATION ITEMS
CONSULT-III can display each diagnosis item using the diagnosis test modes shown following.
24 /
−
24
Intake sensor
HAC-102, "Diagnosis Procedure"
25 /
−
25
Sunload sensor
*
26 /
−
26
Air mix door motor PBR
HAC-72, "WITHOUT LEFT AND RIGHT VEN-
TILATION TEMPERATURE SEPARATELY
CONTROL SYSTEM : Diagnosis Procedure"
Code No.
Malfunctioning sensor and door motor (Including circuits)
Reference page
SJIA1781E
Code No.
*1 *2
Mode or intake door position
Reference page
31
VENT
Mode door motor
32
DEF
37
FRE
Intake door motor
38
20% FRE
39
REC
SJIA1782E
HAC-50
< FUNCTION DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
DIAGNOSIS SYSTEM (AUTO AMP.)
DATA MONITOR
Display Item List
WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CON-
TROL SYSTEM
WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL
SYSTEM : Diagnosis Description
INFOID:0000000000959919
SELF-DIAGNOSIS SYSTEM
The self-diagnosis system is built into the unified meter and A/C amp. to quickly locate the cause of malfunc-
tions.
SELF-DIAGNOSIS FUNCTION
The self-diagnosis system diagnoses sensors, door motors, blower motor, etc. by system line. Refer to appli-
cable sections (items) for details. Shifting from normal control to the self-diagnosis system is accomplished by
starting the engine (turning the ignition switch ON) and pressing OFF switch for at least 5 seconds. The OFF
switch must be pressed within 10 seconds after starting the engine (ignition switch is turned ON). This system
will be canceled by either pressing AUTO switch or turning the ignition switch OFF. Shifting from one step is
accomplished by means of turning temperature control dial (driver side), as required.
System part
Check item, diagnosis mode
Description
ECM
Data monitor
Displays ECM input data in real time.
Monitor Item
Condition
Value/Status
IGN ON SW
Ignition switch OFF
→
ON
OFF
→
ON
FAN ON SIG
Ignition switch ON
Blower fan motor switch ON
ON
Blower fan motor switch OFF
OFF
AIR COND SW
Ignition switch ON
Compressor ON
ON
Compressor OFF
OFF
REFRIGERANT PRESSURE
SENSOR
• Engine is running
• Warm-up condition
• Both A/C switch and blower fan motor switch: ON (Compressor
operates)
1.0 - 4.0 V
DIAGNOSIS SYSTEM (AUTO AMP.)
HAC-51
< FUNCTION DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Shifting from STEP-5 to AUXILIARY MECHANISM is accomplished by means of pressing fan (UP:+) switch.
CONFORMATION METHOD
1.
SET IN SELF-DIAGNOSIS MODE
1.
Turn ignition switch ON.
2.
Set in self-diagnosis mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press OFF switch for at least 5 seconds.
NOTE:
• If battery voltage drops below 12 V during diagnosis STEP-3, door motor speed becomes slower and as a
result, the system may generate an error even when operation is normal. To avoid this, start engine before
performing this diagnosis.
• Former STEP-1 (LEDs and display screen are checked) does not exist in this self-diagnosis function.
• OFF switch may not be recognized according to the timing of pressing it. Operate OFF switch after turning
the intake switch LEDs (REC/FRE) ON.
>> GO TO 2.
2.
STEP-2: SENSOR AND DOOR MOTOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT
JSIIA0059GB
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