Nissan Cube. Instruction — part 547
HAC-26
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
DIAGNOSIS SYSTEM (A/C AUTO AMP.)
DIAGNOSIS SYSTEM (A/C AUTO AMP.)
Diagnosis Description
INFOID:0000000009950976
ON BOARD SELF-DIAGNOSIS SYSTEM
On board self-diagnosis system is built into A/C auto amp. to quickly locate the case of malfunctions. The self-
diagnosis system diagnoses sensor, door motor, blower motor, etc. and also can make the setting of auxiliary
mechanism.
SELF-DIAGNOSIS PROCEDURE
Self-diagnosis Mode Entry
The self-diagnosis is started by pressing the OFF switch at 5 seconds or more within 10 seconds after starting
engine.
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. Start engine before performing this
diagnosis to avoid this.
Changes of Step up and Step down
• The changes of STEP 1 – 5 can be performed by pressing the temperature control switch.
• The change of STEP 6 – 7 can be performed by pressing the fan control switch during the condition of
STEP-5.
Self-diagnosis Cancellation
By AUTO switch is pressed or ignition switch is turned OFF, the self-diagnosis is canceled.
STEP-1: INDICATOR CHECK
Description
A/C switch indicator and A/C display indication are checked.
Normal: All switch indicator and display indication are turned ON.
Malfunction: Malfunctioning part indicator is not turned ON.
STEP-2: SENSOR DIAGNOSIS
Diagnosis item
Diagnosis content
Diagnosis part
STEP 1:
Indicator check
Switch indicator and display indication are
checked.
A/C control (A/C auto amp.)
STEP 2:
Sensor diagnosis
The circuit diagnoses of each sensor and
intake door motor are performed. A/C auto
amp. indicates the result on the display.
• Ambient sensor
• In-vehicle sensor
• Intake sensor
• Sunload sensor
• Intake door motor (PBR)
STEP 3:
Door motor diagnosis
The circuit diagnoses of mode door motor
and air mix door motor are performed. A/C
auto amp. indicates the result on the dis-
play.
• Mode door motor
• Air mix door motor
STEP 4:
Operation check
Operational check of each part is per-
formed.
• Mode door motor
• Intake door motor
• Air mix door motor
• Blower motor
• Compressor
• Condenser fan
STEP 5:
Each sensor recognition temperature
check
Each sensor recognition temperature is in-
dicated on the display.
• Ambient sensor
• In-vehicle sensor
• Intake sensor
STEP 6:
Temperature setting trimmer
Temperature setting trimmer is performed.
—
STEP 7:
Inlet port memory function
Inlet port memory function is performed.
—
DIAGNOSIS SYSTEM (A/C AUTO AMP.)
HAC-27
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
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Description
When STEP-2 is selected, “2” is indicated on the display for 3 seconds, in this period, sensor diagnosis is
started.
Normal: “20” is displayed.
Malfunction: The ones place digit of corresponding code number blinks 2 times on the A/C display. When
short-circuit error, “AUTO” blinks on the display.
NOTE:
If two or more sensors, or door motor malfunction, the ones place digit of corresponding code numbers blink
respectively twice.
Diagnosis Result
*: Perform the self-diagnosis under sunshine. When performing indoors, aim a light (more than 60 W) at sunload sensor, otherwise code
NO. 25 indicates despite that sunload sensor is functioning normally.
NOTE:
• When ambient sensor has the malfunction of open-circuit, the sensor judges that ambient temperature is
extremely cold, and controls the in vehicle temperature to warmly.
• When performing the diagnosis of intake door motor, the target angle of PBR is set at 40%.
• The error judgment status of intake door motor is not decided by open or short circuit, it is decided by the
voltage value as follows:
- Short: 2.5 V or more
- Open: 1.5 V or less
STEP-3: DOOR MOTOR DIAGNOSIS
Description
When STEP-3 is selected, “3” is indicated on the display for 1 second, in this period, door motor diagnosis is
started.
The check of door motor is performed by A/C auto amp. transmitting output signal to each door motor.
JPIIA1675GB
Code No.
Corresponding sensor
or door motor
Malfunctioning judgment condition
Reference
Open
Short
21 / AUTO 21
Ambient sensor
−
42
°
C (
−
44
°
F) or less
100
°
C (212
°
F) or more
HAC-33, "Diagnosis Proce-
dure"
22 / AUTO 22
In-vehicle sensor
−
42
°
C (
−
44
°
F) or less
100
°
C (212
°
F) or more
HAC-36, "Diagnosis Proce-
dure"
24 / AUTO 24
Intake sensor
−
42
°
C (
−
44
°
F) or less
100
°
C (212
°
F) or more
HAC-39, "Diagnosis Proce-
dure"
25 / AUTO 25
Sunload sensor*
33 W/m
2
(28 kcal/m
2
·h)
1677 W/m
2
(1442 kcal/m
2
·h)
HAC-41, "Diagnosis Proce-
dure"
26 / AUTO 26
Intake door motor (PBR)
PBR angle 30% or less
PBR angle 50% or more
HAC-28
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
DIAGNOSIS SYSTEM (A/C AUTO AMP.)
Normal: “30” is displayed.
Malfunction: The ones place digit of corresponding code number blinks 2 times on the A/C display. When
short-circuit error, “AUTO” blinks on the display.
NOTE:
If two or more door motor connectors malfunction, the ones place digit of corresponding code numbers blink
respectively twice.
NOTE:
When the malfunctioning condition as following figure, “31” is displayed.
Diagnosis Result
NOTE:
• If all four terminals of each door motor show an open circuit, there is probably a disconnected connector or
an open circuit in door motor drive power supply harness.
• If a short circuit occurs in harness between terminals for each door motor drive signal, although it cannot be
detected by self-diagnosis, door motor will vibrate when it operates.
Door Motor Starting Position Reset
• Pressing DEF switch during STEP-3 will send a reset signal to air mix door and mode door motor to reset
them to starting position.
JPIIA1676GB
JPIIA1677GB
Code No.
Corresponding door
motor
Malfunctioning judgment condition
Reference
31 / AUTO 31
Air mix door motor
Short or open circuit of air mix door
drive signal terminal 4
32 / AUTO 32
Short or open circuit of air mix door
drive signal terminal 1
33 / AUTO 33
Short or open circuit of air mix door
drive signal terminal 2
34 / AUTO 34
Short or open circuit of air mix door
drive signal terminal 3
35 / AUTO 35
Mode door motor
Short or open circuit of mode door drive
signal terminal 4
36 / AUTO 36
Short or open circuit of mode door drive
signal terminal 1
37 / AUTO 37
Short or open circuit of mode door drive
signal terminal 2
38 / AUTO 38
Short or open circuit of mode door drive
signal terminal 3
DIAGNOSIS SYSTEM (A/C AUTO AMP.)
HAC-29
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
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• During reset operation, DEF switch indicator and “30” blink for approximately 9 seconds.
STEP-4: OPERATION CHECK
Description
When STEP-4 is selected, each part operation is started with indicating “4” on the display.
Each time DEF switch is pressed, the display will change to 41
→
42
→
43
→
44
→
45
→
46
→
41.
Operation Contents
Checks must be visually, by listening the sound or by touching air outlets with hand, etc. for improper opera-
tion.
STEP-5: EACH SENSOR RECOGNITION CHECK
Description
When STEP-5 is selected, “5” is indicated on the display.
Each time DEF switch is pressed, each sensor recognition temperature is changed in order of the following:
5
→
Ambient temperature
→
In-vehicle temperature
→
Intake temperature
→
5.
NOTE:
Each sensor recognition temperature is not displayed in less than
−
30
°
C (
−
22
°
F) or more than 55
°
C (131
°
F).
STEP-6: TEMPERATURE SETTING TRIMMER
Description
The trimmer compensates for differences in range of
±
3
°
C (
±
6
°
F) between temperature setting (displayed dig-
itally) and temperature felt by customer.
Setting Procedure
HAC-10, "Temperature Setting Trimmer"
STEP-7: INLET PORT MEMORY FUNCTION
Description
• Inlet port setting can be memorized when ignition switch is turned OFF.
• Inlet port setting can be selected from FRE (fresh air intake), REC (recirculation), or “Do not perform the
memory” when ignition switch is turned ON.
Setting Procedure
HAC-11, "Inlet Port Memory Function"
.
Code No.
Mode door posi-
tion
Intake door posi-
tion
Air mix door posi-
tion
Magnet clutch
Blower fan motor
(voltage)
Condenser fan
ON signal
41
VENT
REC
Full cold
ON
5 V
ON
42
B/L
REC
Full cold
ON
10.5 V
ON
43
B/L
20% FRE
Medium (50%)
ON
8.5 V
ON
44
FOOT
80% FRE
Medium (50%)
OFF
8.5 V
OFF
45
D/F
FRE
Full hot
OFF
8.5 V
OFF
46
DEF
FRE
Full hot
ON
Battery voltage
ON
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