Page 521 of 5621
ATC-74
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
12. CHECK AIR MIX DOOR MOTOR OPERATION
1. Turn ignition switch OFF.
2. Reconnect air mix door motor (passenger 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).
Page 522 of 5621
TROUBLE DIAGNOSIS
ATC-75
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2006 January2006 M35/M45
Mode Door Motor CircuitNJS000GO
SYMPTOM:
Air outlet does not change.
Mode door motor does not operate normally.
Page 523 of 5621
ATC-76
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
INSPECTION FLOW
RJIA4055E
Page 524 of 5621
TROUBLE DIAGNOSIS
ATC-77
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2006 January2006 M35/M45
*1ATC-37, "Discharge Air Flow"*2AT C - 6 4 , "Operational Check"*3ATC-122, "Intake Sensor Circuit"
*4ATC-56, "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 2 to 6.*5AT C - 11 3 , "
Ambient Sensor Circuit"*6AT C - 11 6 , "In-Vehicle Sensor Circuit"
*7ATC-119, "Sunload Sensor Circuit"*8AT C - 8 3 , "Air Mix Door Motor Cir-
cuit"
*9AT C - 5 6 , "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 13.
*10ATC-70, "
DIAGNOSIS PROCE-
DURE FOR LAN CIRCUIT"
*11ATC-140, "MODE DOOR MOTOR"*12AT C - 4 1 , "SYMPTOM TABLE"
Page 525 of 5621

ATC-78
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
SYSTEM DESCRIPTION
Component Parts
Mode door control system components are:
Unified meter and A/C amp.
Mode door motor (LCU)
A/C LAN system (PBR built-in mode door motor, upper ventilator door motor, air mix door motor and
intake door motor)
In-vehicle sensor
Ambient sensor
Sunload sensor
Intake sensor
System Operation
The unified meter and A/C amp. receives data from each of the sensors. The unified meter and A/C amp.
sends air mix door, mode door, upper ventilator door and intake door opening angle data to the air mix door
motor LCU, mode door motor LCU, upper ventilator door motor LCU and intake door motor LCU.
The air mix door motor, mode door motor, upper ventilator door motor and intake door motor read their respec-
tive signals according to the address signal. Opening angle indication signals received from the unified meter
and A/C 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, OPEN/SHUT and FRE/REC
operation is selected. The new selection data are returned to the unified meter and A/C amp.
RJIA4056E
Page 526 of 5621
TROUBLE DIAGNOSIS
ATC-79
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2006 January2006 M35/M45
Mode Door Control Specification
COMPONENT DESCRIPTION
Mode Door Motor
The mode door motors are attached to the heater & cooling unit
assembly. It rotates so that air is discharged from the outlet set by
the unified meter and A/C 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 AT C - 7 0 , "
DIAGNOSIS PROCEDURE FOR LAN CIRCUIT" .
RJIA1778E
RJIA4057E
RJIA4058E
Page 527 of 5621
ATC-80
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
Upper Ventilator Door Motor CircuitNJS000GP
SYMPTOM:
Upper ventilator outlet does not change.
Upper ventilator door motor does not operate normally.
INSPECTION FLOW
*1AT C - 5 6 , "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 2.*2ATC-56, "
FUNCTION CONFIRMA-
TION PROCEDURE", see No. 5.*3ATC-56, "
FUNCTION CONFIRMA-
TION PROCEDURE", see No. 6.
*4AT C - 11 9 , "
Sunload Sensor Circuit"*5ATC-56, "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 13.*6ATC-70, "
DIAGNOSIS PROCE-
DURE FOR LAN CIRCUIT"
*7ATC-142, "UPPER VENTILATOR
DOOR MOTOR"
*8ATC-64, "Operational Check"*9ATC-41, "SYMPTOM TABLE"
RJIA4059E
Page 528 of 5621

TROUBLE DIAGNOSIS
ATC-81
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2006 January2006 M35/M45
SYSTEM DESCRIPTION
Component Parts
Upper ventilator door control system components are:
Unified meter and A/C amp.
Upper ventilator door motor (LCU)
A/C LAN system (PBR built-in mode door motor, upper ventilator door motor, air mix door motor and
intake door motor)
Sunload sensor
System Operation
The unified meter and A/C amp. receives data from each of the sensors. The unified meter and A/C amp.
sends air mix door, mode door, upper ventilator door and intake door opening angle data to the air mix door
motor LCU, mode door motor LCU, upper ventilator door motor LCU and intake door motor LCU.
The air mix door motor, mode door motor, upper ventilator door motor and intake door motor read their respec-
tive signals according to the address signal. Opening angle indication signals received from the unified meter
and A/C 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, OPEN/SHUT and FRE/REC
operation is selected. The new selection data are returned to the unified meter and A/C amp.
RJIA4060E