Infiniti Q45. Manual — part 115
TROUBLE DIAGNOSIS
ATC-55
C
D
E
F
G
H
I
K
L
M
A
B
ATC
5.
STEP-2: SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT
Turn temperature dial (driver side) 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 dial (driver side) clockwise.
Does code No.30 appear on the display?
YES
>> GO TO 7.
NO
>> GO TO 15.
7.
STEP-4: OPERATION OF EACH ACTUATOR IS CHECKED
1.
Turn temperature dial (driver side) clockwise.
2.
Press
(DEF) switch, code No. of each actuator test is indi-
cated on the display.
>> GO TO 8.
RJIA0219E
RJIA0220E
RJIA0221E
ATC-56
TROUBLE DIAGNOSIS
8.
CHECK ACTUATORS
Refer to the following chart and confirm discharge air flow, air temperature, blower motor duty ratio and com-
pressor operation.
Checks must be made visually, by listening to any noise, or by touching air outlets with hand, etc. for improper
operation.
OK or NG
OK
>> GO TO 9.
NG
>>
●
Air outlet does not change.
Go to Mode Door Motor Circuit. Refer to
ATC-70, "Mode Door Motor Circuit"
●
Intake door does not change.
Go to Intake Door Motor Circuit. Refer to
ATC-76, "Intake Door Motor Circuit"
●
Discharge air temperature does not change.
Go to Air Mix Door Motor Circuit. Refer to
ATC-73, "Air Mix Door Motor Circuit"
.
●
Blower motor operation is malfunctioning.
Go to Blower Motor Circuit. Refer to
ATC-81, "Blower Motor Circuit"
●
Magnet clutch does not engage.
Go to Magnet Clutch Circuit. Refer to
ATC-86, "Magnet Clutch Circuit"
Code No.
41
42
43
44
45
46
47
48
Mode door position
(Driver side)
VENT
(B/L
OPEN)
VENT
(B/L
SHUT)
B/L 1
(B/L
SHUT)
B/L 1
(B/L
OPEN)
B/L 2
FOOT
D/F
DEF
Mode door position
(Passenger side)
VENT
(B/L
OPEN)
VENT
(B/L
SHUT)
B/L 1
(B/L
SHUT)
B/L1
(B/L
OPEN)
B/L 2
FOOT 1
FOOT 2
DEF
Intake door position
REC
REC
REC
20% FRE
20% FRE
FRE
FRE
FRE
Air mix door position
FULL
COLD
FULL
COLD
FULL
COLD
FULL HOT
FULL HOT
FULL HOT
FULL HOT
FULL HOT
Blower motor duty ratio
37%
37%
91%
65%
65%
65%
65%
91%
Compressor
ON
ON
ON
OFF
OFF
OFF
ON
ON
Rear vent door position
OPEN
SHUT
SHUT
SHUT
SHUT
SHUT
SHUT
SHUT
Electronic control valve
(ECV) duty ratio
100%
50%
100%
0%
0%
0%
50%
100%
RJIA0222E
TROUBLE DIAGNOSIS
ATC-57
C
D
E
F
G
H
I
K
L
M
A
B
ATC
9.
STEP-5: TEMPERATURE OF EACH SENSOR IS CHECKED
1.
Turn the temperature dial (driver side) clockwise.
2.
Code No. 51 appears on the display.
>> GO TO 10.
10.
CHECK AMBIENT SENSOR
Press
(DEF) switch one time. Temperature detected by ambient
sensor is indicated on the display.
NOTE:
If temperature shown on display greatly differs from actual tempera-
ture, check sensor circuit first, then inspect sensor.
OK or NG
OK
>> GO TO 11.
NG
>> Go to Ambient Sensor Circuit. Refer to
11.
CHECK IN-VEHICLE SENSOR
Press
(DEF) switch the second time. Temperature detected by in-
vehicle sensor is indicated on the display.
NOTE:
If temperature shown on display greatly differs from actual tempera-
ture, check sensor circuit first, then inspect sensor.
OK or NG
OK
>> GO TO 12.
NG
>> Go to In-vehicle Sensor Circuit. Refer to
12.
CHECK INTAKE SENSOR
Press
(DEF) switch the third time. Temperature detected by intake
sensor is indicated on the display.
NOTE:
If temperature shown on display greatly differs from actual tempera-
ture, check sensor circuit first, then inspect sensor.
OK or NG
OK
>> GO TO 13.
NG
>> Go to Intake Sensor Circuit. Refer to
RJIA0223E
RJIA1271E
RJIA1272E
ATC-58
TROUBLE DIAGNOSIS
13.
CHECK MULTIPLEX COMMUNICATION ERROR
1.
Press intake switch.
2.
Multiplex communication error between AV C/U (AV and NAVI
C/U) and auto amp. can be detected as self-diagnosis results.
(If plural errors occur, the display of each error will blink two
times for 0.5 second intervals.)
3.
Is multiplex communication error detected as self-diagnosis
results?
CAUTION:
Rear control cancel switch has two positions “CANCEL” and
“ON”. If rear control cancel switch has been canceled, Multiplex
communication error might be detected even there is no mal-
function.
So it is necessary to follow the procedure below:
1.
Switch “ON” position on the rear control cancel switch.
2.
Disconnect the battery negative terminal for approx. 10 seconds or more in order to delete the
memory of self-diagnosis.
3.
Reconfirm the multiplex communication error as self-diagnosis result is detected.
YES or NO
YES
>> Go to Multiplex Communication Circuit. Refer to
ATC-120, "Multiplex Communication Circuit"
.
NO
>> 1. Turn ignition switch OFF or AUTO switch ON.
2. INSPECTION END
RJIA1589E
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