Infiniti G35 (V35). Manual — part 99
TROUBLE DIAGNOSIS
ATC-67
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ATC
10.
CHECK AIR MIX DOOR MOTOR OPERATION
1.
Turn ignition switch OFF.
2.
Disconnect air mix door motor (driver side) connector.
3.
Turn ignition switch ON.
4.
Confirm operation of air mix door motor (passenger side).
OK or NG
OK
>> [Air mix door motor (passenger side) operates normally.]
●
Replace air mix door motor (driver side).
NG
>> [Air mix door motor (passenger side) does not operate normally.]
●
Replace air mix door motor (passenger side).
ATC-68
TROUBLE DIAGNOSIS
Mode Door Motor Circuit
NJS0003F
SYMPTOM
●
Air outlet does not change.
●
Mode door motor does not operate normally.
INSPECTION FLOW
*1
*2
*3
ATC-52, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No. 1.
*4
ATC-52, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No. 5 to 7.
*5
ATC-100, "Ambient Sensor Circuit"
*6
ATC-103, "In-vehicle Sensor Circuit"
*7
ATC-106, "Sunload Sensor Circuit"
*8
ATC-73, "Air Mix Door Motor PBR
Circuit"
*9
ATC-52, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No. 14.
SJIA1843E
TROUBLE DIAGNOSIS
ATC-69
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ATC
SYSTEM DESCRIPTION
Component Parts
Mode door control system components are:
●
Display and A/C auto amp.
●
Mode door motor (LCU)
●
A/C LAN system (PBR built-in mode door motor, air mix door motor and intake door motor)
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In-vehicle sensor
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Ambient sensor
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Sunload sensor
●
Intake sensor
System Operation
The display and A/C auto amp. receives data from each of the sensors. The display and A/C auto amp. sends
air mix door, mode door and intake door opening angle data to the air mix door motor LCUs, mode door motor
LCU and intake door motor LCU.
The air mix door motors, mode door motor and intake door motor read their respective signals according to the
address signal. Opening angle indication signals received from the display and A/C auto amp. and each of the
motor position sensors are compared by the LCUs in each door motor with the existing decision and opening
angles. Subsequently, HOT/COLD, DEF/VENT and FRE/REC operation is selected. The new selection data
are returned to the display and A/C auto amp.
Mode Door Control Specification
*10
ATC-64, "DIAGNOSIS PROCE-
DURE FOR LAN CIRCUIT"
*11
*12
*13
ATC-109, "Intake Sensor Circuit"
SJIA1302E
RJIA1639E
ATC-70
TROUBLE DIAGNOSIS
COMPONENT DESCRIPTION
Mode Door Motor
The mode door motor is attached to the heater & cooling unit assem-
bly. It rotates so that air is discharged from the outlet set by the dis-
play and A/C auto amp. Motor rotation is conveyed to a link which
activates the mode door.
DIAGNOSIS PROCEDURE FOR MODE DOOR MOTOR
SYMPTOM: Mode door motor does not operate normally.
Perform diagnosis procedure. Refer to
ATC-64, "DIAGNOSIS PROCEDURE FOR LAN CIRCUIT"
.
RJIA0890E
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