Nissan Pathfinder (2005 year). Instruction — part 50
TROUBLE DIAGNOSIS
ATC-47
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ATC
2005 Pathfinder
WJWA0195E
ATC-48
TROUBLE DIAGNOSIS
2005 Pathfinder
Front Air Control Terminals and Reference Value
EJS002WY
Measure voltage between each terminal and ground by following
Terminals and Reference Value for front air control.
PIN CONNECTOR TERMINAL LAYOUT
TERMINALS AND REFERENCE VALUE FOR FRONT AIR CONTROL
WJIA1075E
WJIA0402E
Termi-
nal No.
Wire
color
Item
Ignition
switch
Condition
Voltage (V)
(Approx.)
1
BR
Mode door motor CW
ON
Clockwise rotation
Battery voltage
2
W
Air mix door motor (Driver) CW
ON
Clockwise rotation
Battery voltage
3
G/R
Air mix door motor (Driver) CCW
ON
Counterclockwise rotation
Battery voltage
4
Y
Intake door motor CW
ON
Counterclockwise rotation
Battery voltage
5
O
Intake door motor CCW
ON
Clockwise rotation
Battery voltage
6
W/G
Power supply for IGN
ON
-
Battery voltage
8
G
Illumination +
ON
Park lamps ON
Battery voltage
9
BR
Illumination -
-
Park lamps ON
10
W
Compressor ON signal
ON
A/C switch OFF
5V
ON
A/C switch ON
0V
11
Y
Rear defrost request
ON
-
Battery voltage
12
L
Intake sensor
ON
-
0 - 5V
13
V
Sensor ground
ON
-
0 - 5V
14
R
Mode door motor CCW
ON
Counterclockwise rotation
Battery voltage
15
P
Air mix door motor (Passenger) CW
ON
Clockwise rotation
Battery voltage
16
L
Air mix door motor (Passenger)
CCW
ON
Counter clockwise rotation
Battery voltage
17
GR
Air mix door motor (Rear) CW
ON
Clockwise rotation
Battery voltage
18
O
Air mix door motor (Rear) CCW
ON
Counterclockwise rotation
Battery voltage
PIIA2344E
TROUBLE DIAGNOSIS
ATC-49
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ATC
2005 Pathfinder
19
R/Y
Power supply for BAT
-
-
Battery voltage
20
B
Ground
-
-
0V
21
V
Mode door motor feedback
ON
-
0 - 5V
22
SB
Air mix door motor (Driver) feedback
ON
-
0 - 5V
23
G
Power supply for mode door motor
PBR
ON
-
5V
24
L/G
Air mix door motor (Rear) PTC
ON
-
0 - 5V
25
R
Air mix door motor (Rear) feedback
ON
-
0 - 5V
26
P
Ground for mode door motor PBR
ON
-
0V
27
LG
In-vehicle sensor signal
ON
-
0 - 5V
28
W
Ambient sensor 1
ON
-
0 - 5V
29
G
Optical sensor (Driver)
ON
-
0 - 5V
30
Y
Rear select signal
ON
-
0V - Battery voltage
32
V
Variable blower control
ON
-
0 - 5V
33
BR
In-vehicle sensor motor (+)
ON
-
Battery voltage
34
O
In-vehicle sensor motor (-)
ON
-
0V
35
R
Fan ON signal
ON
Blower switch OFF
5V
ON
Blower switch ON
0V
36
SB
Air mix door motor (Passenger)
feedback
ON
-
0 - 5V
37
GR
Optical sensor (Passenger)
ON
-
0 - 5V
38
BR
Front blower request
ON
Front blower motor OFF
Battery voltage
Front blower motor ON
0V
39
O
Rear blower request
ON
Front blower motor OFF
Battery voltage
Front blower motor ON
0V
41
L
CAN-H
ON
-
0 - 5V
42
P
CAN-L
ON
-
0 - 5V
44
GR
Heater pump request
ON
Heater pump on
0V
Heater pump off
Battery voltage
Termi-
nal No.
Wire
color
Item
Ignition
switch
Condition
Voltage (V)
(Approx.)
ATC-50
TROUBLE DIAGNOSIS
2005 Pathfinder
A/C System Self-diagnosis Function
EJS002WZ
DESCRIPTION
The self-diagnostic system diagnoses sensors, door motors, blower motor, etc. Refer to applicable sections
(items) for details. Shifting from usual control to the self-diagnostic system is accomplished by turning the igni-
tion switch ON and pressing the down blower arrow switch while turning the passenger temperature dial in
either direction (hold momentarily). Within 3 seconds of doing this, press the AUTO switch. The blower bars
will flash and the ambient temperature display will indicate 0
°
during the self-diagnosis. Fault codes (if any are
present) will be displayed in the ambient temperature display area. Refer to
.
WJIA1080E
TROUBLE DIAGNOSIS
ATC-51
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ATC
2005 Pathfinder
SELF-DIAGNOSIS CODE CHART
Code No.
Reference page
02
EE changed by calibration
03
Battery voltage out of range
12
Air mix door motor (Passenger) circuit malfunction
ATC-67, "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (PASSENGER)"
20
BCM not responding to A/C request
ATC-97, "DIAGNOSTIC PROCEDURE FOR MAGNET
CLUTCH"
21
BCM not responding to rear defroster request
22
Air mix door motor (Driver) circuit failure
ATC-65, "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (DRIVER)"
30
In-vehicle sensor circuit out of range (low)
ATC-116, "In-vehicle Sensor Circuit"
31
In-vehicle sensor circuit out of range (high)
38
Air mix door motor (rear) circuit malfunction
ATC-69, "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (REAR)"
40
Ambient sensor 1 circuit short
ATC-113, "Ambient Sensor 1 Circuit"
41
Ambient sensor 1 circuit open
44
In-vehicle sensor motor circuit open
ATC-116, "In-vehicle Sensor Circuit"
46
In-vehicle sensor motor circuit short
50
Optical sensor (Driver) circuit open or short
ATC-120, "Optical Sensor Circuit"
52
Optical sensor (Passenger) circuit open or short
56
Intake sensor circuit short
ATC-122, "Intake Sensor Circuit"
57
Intake sensor circuit open
80
CAN bus fault
82
Intake door motor (driver) circuit malfunction
ATC-74, "DIAGNOSTIC PROCEDURE FOR INTAKE DOOR
MOTOR"
90
Stuck button
92
Mode door motor circuit malfunction
ATC-52
TROUBLE DIAGNOSIS
2005 Pathfinder
Operational Check (Front)
EJS002X0
The purpose of the operational check is to confirm that the system operates properly.
CHECKING MEMORY FUNCTION
1.
Set the temperature to 32
°
C (90
°
F).
2.
Turn front blower control dial counterclockwise until system
shuts OFF.
3.
Turn ignition switch OFF.
4.
Turn ignition switch ON.
5.
Press the AUTO switch.
6.
Confirm that the set temperature remains at previous tempera-
ture.
7.
Turn front blower control dial counterclockwise until system
shuts OFF.
If NG, go to trouble diagnosis procedure for
.
If OK, continue with next check.
CHECKING BLOWER
1.
Press the AUTO switch. Blower should operate on low speed.
The blower symbol should have one blade lit (on display).
2.
Turn the front blower control dial again, and continue checking
blower speed and blower symbol until all speeds are checked.
3.
Leave blower on MAX speed.
If NG, go to trouble diagnosis procedure for
.
If OK, continue with next check.
Conditions
: Engine running and at normal operating temperature
WJIA1040E
WJIA1043E
WJIA1040E
WJIA1044E
TROUBLE DIAGNOSIS
ATC-53
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ATC
2005 Pathfinder
CHECKING DISCHARGE AIR
1.
Press MODE switch four times and the DEF switch.
2.
Each position indicator should change shape (on display).
3.
Confirm that discharge air comes out according to the air distri-
bution table. Refer to
.
Mode door position is checked in the next step.
If NG, go to trouble diagnosis procedure for
.
If OK, continue the check.
NOTE:
Confirm that the compressor clutch is engaged (sound or visual
inspection) and intake door position is at fresh when the DEF or D/F
is selected.
CHECKING RECIRCULATION
1.
Press recirculation (
) switch one time. Recirculation indica-
tor should illuminate.
2.
Press recirculation (
) switch one more time. Recirculation
indicator should go off.
3.
Listen for intake door position change (blower sound should
change slightly).
If NG, go to trouble diagnosis procedure for
.
If OK, continue next check.
NOTE:
Confirm that the compressor clutch is engaged (sound or visual
inspection) and intake door position is at fresh when the DEF or D/F is selected.
CHECKING TEMPERATURE DECREASE
1.
Rotate temperature control dial (driver side) counterclockwise
until 16
°
C (60
°
F) is displayed.
2.
Check for cold air at appropriate discharge air outlets.
If NG, listen for sound of air mix door motor operation. If OK, go to
trouble diagnosis procedure for
ATC-102, "Insufficient Cooling"
. If
air mix door motor appears to be malfunctioning, go to
"DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR
(DRIVER)"
or
ATC-67, "DIAGNOSTIC PROCEDURE FOR AIR MIX
.
If OK, continue the check.
WJIA1045E
WJIA0528E
WJIA1046E
WJIA1047E
ATC-54
TROUBLE DIAGNOSIS
2005 Pathfinder
CHECKING TEMPERATURE INCREASE
1.
Rotate temperature control dial clockwise (driver side) until 32
°
C
(90
°
F) is displayed.
2.
Check for hot air at appropriate discharge air outlets.
If NG, listen for sound of air mix door motor operation. If OK, go to
trouble diagnosis procedure for
ATC-109, "Insufficient Heating"
. If
air mix door motor appears to be malfunctioning, go to
"DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR
(DRIVER)"
or
ATC-67, "DIAGNOSTIC PROCEDURE FOR AIR MIX
.
If OK, continue with next check.
CHECK A/C SWITCH
1.
Press A/C switch when AUTO switch is ON, or in instruction mode.
2.
A/C switch indicator will turn ON.
●
Confirm that the compressor clutch engages (sound or visual
inspection).
If NG, go to trouble diagnosis procedure for
.
If OK, continue with next check.
CHECKING AUTO MODE
1.
Press AUTO switch.
2.
Display should indicate AUTO.
●
If ambient temperature is warm, and selected temperature is
cool, confirm that the compressor clutch engages (sound or
visual inspection). (Discharge air and blower speed will
depend on ambient, in-vehicle, and set temperatures.)
If NG, go to trouble diagnosis procedure for
and Ground Circuit for Front Air Control"
, then if necessary, trouble
diagnosis procedure for
ATC-96, "Magnet Clutch Circuit"
.
If all operational checks are OK (symptom cannot be duplicated), go
to malfunction simulation tests in
ATC-35, "How to Perform Trouble
Diagnosis for Quick and Accurate Repair"
and perform tests as out-
lined to simulate driving conditions environment. If symptom appears, refer to
ble Diagnosis for Quick and Accurate Repair"
,
and perform applicable trouble
diagnosis procedures.
WJIA1048E
WJIA1049E
WJIA1043E
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