Infiniti F50. Manual — part 138
TROUBLE DIAGNOSIS
ATC-77
C
D
E
F
G
H
I
K
L
M
A
B
ATC
Intake Door Motor Circuit
EJS000JQ
SYMPTOM:
●
Intake door does not change.
●
Intake door motor does not operate normally.
INSPECTION FLOW
*1
ATC-54, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No.1.
*2
ATC-108, "Ambient Sensor Circuit"
*3
ATC-110, "In-Vehicle Sensor Cir-
cuit"
*4
ATC-113, "Sunload Sensor Circuit"
.
*5
ATC-74, "Air Mix Door Motor Circuit"
. *6
ATC-54, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No. 14.
*7
*8
ATC-79, "COMPONENT DESCRIP-
TION"
for intake door motor.
*9
.
*10
ATC-54, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No.5 to 7.
*11
.
*12
ATC-116, "Intake Sensor Circuit"
RJIA1569E
ATC-78
TROUBLE DIAGNOSIS
SYSTEM DESCRIPTION
Component Parts
Intake door control system components are:
●
Auto amp.
●
Intake door motor
●
A/C LAN system (PBR built-in mode motor and air mix door motor)
●
In-vehicle sensor
●
Ambient sensor
●
Sunload sensor
●
Intake sensor
System Operation
The intake door control determines intake door position based on the ambient temperature, the intake air tem-
perature and the in-vehicle temperature. When the ECON, DEFROST, or OFF switches are pushed, the auto
amplifier sets the intake door at the FRESH position.
Intake Door Control Specification
RJIA1291E
RHA383H
TROUBLE DIAGNOSIS
ATC-79
C
D
E
F
G
H
I
K
L
M
A
B
ATC
COMPONENT DESCRIPTION
Intake Door Motor
The intake door motor is attached to the intake unit. It rotates so that
air is drawn from inlets set by the auto amplifier. Motor rotation is
conveyed to a lever which activates the intake door.
DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR
SYMPTOM: Intake door motor does not operate normally.
Perform diagnostic procedure for LAN system circuit. Refer to
ATC-67, "DIAGNOSTIC PROCEDURE FOR
.
Rear Ventilator Door Motor
EJS001Y9
COMPONENT DESCRIPTION
Rear ventilator door motor is attached to the rear ventilator duct No.
1.
Rear ventilator door is opened or closed by rear ventilator door
motor.
DIAGNOSTIC PROCEDURE FOR REAR VENTILATOR DOOR MOTOR
SYMPTOM: Rear ventilator door motor does not operate.
RJIA0280E
RJIA0289E
RJIA0290E
ATC-80
TROUBLE DIAGNOSIS
1.
CHECK FOR AUTO AMP. OUTPUT
1.
Disconnect rear vent door motor connector.
2.
Set up code No. 41 and 42 in self-diagnosis STEP-4.
3.
Check voltage between rear vent door motor harness connector
M93 terminals 1 (LG), 2 (W/B) and ground.
OK or NG
OK
>> Replace rear ventilator door motor.
NG
>> GO TO 2.
2.
CHECK CIRCUIT CONTINUITY BETWEEN REAR VENTILATOR DOOR MOTOR AND AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect auto amp. connector.
3.
Check continuity between rear vent door motor harness connec-
tor M93 terminals 1 (LG), 2 (W/B) and auto amp. harness con-
nector M119 terminals 6 (LG), 16 (W/B).
OK or NG
OK
>> Replace auto amp.
NG
>> GO TO
ATC-80, "DIAGNOSTIC PROCEDURE FOR
.
Rear control switch
EJS0023Q
DIAGNOSTIC PROCEDURE FOR REAR CONTROL SWITCH
SYMPTOM: Rear control switch does not operate.
1.
CHECK MULTIPLEX COMMUNICATION ERROR
1.
Set in self-diagnosis STEP-5. Refer to
ATC-54, "FUNCTION CONFIRMATION PROCEDURE"
2.
Press intake switch.
3.
Check multiplex communication error between rear control switch and auto amp.
OK or NG
OK
>> GO TO
AV-33, "Rear Control Switch Operation Does Not Work"
.
NG
>> GO TO
ATC-121, "DIAGNOSTIC PROCEDURE FOR MULTIPLEX COMMUNICATION CIRCUIT
.
Terminals
Voltage
(+)
(-)
Code No.
Rear vent door
motor connec-
tor
Terminal No.
(Wire color)
Ground
41
M93
1 (LG)
Approx. 12V
M93
2 (W/B)
Approx. 0V
42
M93
1 (LG)
Approx. 0V
M93
2 (W/B)
Approx.12V
RJIA0291E
1 – 6
: Continuity should exist.
2 – 16
: Continuity should exist.
RJIA0292E
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