Infiniti G35 (V35). Manual — part 95
TROUBLE DIAGNOSIS
ATC-51
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ATC
Self-diagnosis Function
NJS0003B
DESCRIPTION
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.ECON switch or turning the ignition switch OFF. Shifting from one
step is accomplished by means of turning temperature control dial, as required.
Shifting from STEP-5 to AUXILIARY MECHANISM is accomplished by means of pushing (fan) UP switch.
SJIA1276E
ATC-52
TROUBLE DIAGNOSIS
FUNCTION CONFIRMATION PROCEDURE
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.
>> GO TO 2.
2.
STEP-1: LEDS AND DISPLAY ARE CHECKED
Check LED illumination and display screen.
OK or NG
OK
>> GO TO 3.
NG
>> Malfunctioning OFF switch or display and A/C auto amp. Refer to
3.
CHECK TO ADVANCE SELF-DIAGNOSIS STEP-2
Turn temperature control dial clockwise.
Advance to self-diagnosis STEP-2?
YES
>> GO TO 4.
NO
>> Replace A/C and audio controller. (Temperature control dial is malfunctioning.)
4.
CHECK TO RETURN SELF-DIAGNOSIS STEP-1
Turn temperature control dial counterclockwise.
Return to self-diagnosis STEP-1?
YES
>> GO TO 5.
NO
>> Replace A/C and audio controller. (Temperature control dial is malfunctioning.)
RJIA3483E
RJIA3484E
TROUBLE DIAGNOSIS
ATC-53
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ATC
5.
STEP-2: SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT
Turn temperature control dial clockwise.
Does code No. 20 appear on the display?
YES
>> GO TO 6.
NO
>> GO TO 14.
6.
STEP-3: MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED
Turn temperature control dial clockwise.
Does code No. 30 appear on the display?
YES
>> GO TO 7.
NO
>> GO TO 15.
7.
STEP-4: OPERATION OF EACH DOOR MOTOR IS CHECKED
1.
Turn temperature control dial clockwise.
2.
Press
(DEF) switch. Code No. of each door motor test is
indicated on the display.
>> GO TO 8.
PJIA0159E
PJIA0160E
PJIA0161E
ATC-54
TROUBLE DIAGNOSIS
8.
CHECK ACTUATORS
Refer to the following chart and check discharge air flow, air temper-
ature, blower motor duty ratio and compressor operation.
Checks must be made visually, by listening the sound, or by touching air outlets with hand, etc. for improper
operation.
*1: FOOT position during automatic control. Refer to
ATC-59, "AUXILIARY MECHANISM: FOOT POSITION
.
OK or NG
OK
>> GO TO 9.
NG
>>
●
Air outlet does not change.
Go to Mode Door Motor Circuit. Refer to
ATC-68, "Mode Door Motor Circuit"
●
Intake door does not change.
Go to Intake Door Motor Circuit. Refer to
ATC-74, "Intake Door Motor Circuit"
●
Discharge air temperature does not change.
Go to Air Mix Door Motor Circuit. Refer to
ATC-71, "Air Mix Door Motor Circuit"
.
●
Blower motor operation is malfunctioning.
Go to Blower Motor Circuit. Refer to
ATC-77, "Blower Motor Circuit"
●
Magnet clutch does not engage.
Go to Magnet Clutch Circuit. Refer to
ATC-82, "Magnet Clutch Circuit"
9.
STEP-5: TEMPERATURE OF EACH SENSOR IS CHECKED
1.
Turn temperature control dial clockwise.
2.
Code No. 51 appears on the display.
>> GO TO 10.
SJIA0565E
Code No.
41
42
43
44
45
46
Mode door position
VENT
B/L 1
B/L 2
FOOT
*1
D/F
DEF
Intake door position
REC
REC
20%FRE
FRE
FRE
FRE
Air mix door position
FULL COLD
FULL COLD
FULL HOT
FULL HOT
FULL HOT
FULL HOT
Blower motor duty ratio
37%
91%
65%
65%
65%
91%
Compressor
ON
ON
OFF
OFF
ON
ON
Electronic control valve
(ECV) duty ratio
100%
100%
0%
0%
50%
100%
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