Nissan Pathfinder (2007 year). Instruction — part 50
TROUBLE DIAGNOSIS
ATC-51
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ATC
2007 Pathfinder
SELF-DIAGNOSIS CODE CHART
Code No.
Description
Reference page
02
EE changed by calibration (EE/ROM malfunction)
12
Air mix door motor (Driver) circuit malfunction
ATC-66, "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (DRIVER)"
22
Air mix door motor (Passenger) circuit malfunction
ATC-68, "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (PASSENGER)"
30
In-vehicle sensor circuit out of range (short)
ATC-124, "In-vehicle Sensor Circuit"
31
In-vehicle sensor circuit out of range (open)
38
Air mix door motor (rear) circuit malfunction
ATC-70, "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (REAR)"
40
Ambient sensor 1 circuit short
ATC-121, "Ambient Sensor 1 Circuit"
41
Ambient sensor 1 circuit open
50
Optical sensor (Passenger) circuit open or short
ATC-127, "Optical Sensor Circuit"
52
Optical sensor (Driver) circuit open or short
56
Intake sensor circuit short
ATC-129, "Intake Sensor Circuit"
57
Intake sensor circuit open
80
CAN bus fault
81
BCM CAN message missing
82
Intake door motor circuit malfunction
ATC-75, "DIAGNOSTIC PROCEDURE FOR INTAKE DOOR
MOTOR"
92
Mode door motor circuit malfunction
ATC-52
TROUBLE DIAGNOSIS
2007 Pathfinder
Operational Check (Front)
EJS004P2
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 temperature.
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 maximum speed.
If NG, go to trouble diagnosis procedure for
ATC-78, "DIAGNOSTIC PROCEDURE FOR BLOWER MOTOR"
If OK, continue with next check.
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 distribution table. Refer to
Mode door position is checked in the next step.
If NG, go to trouble diagnosis procedure for
ATC-58, "Mode Door Motor Circuit"
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 indicator 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
ATC-73, "Intake Door Motor Circuit"
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
. If air mix door motor appears to be malfunctioning, go to
CEDURE FOR AIR MIX DOOR MOTOR (DRIVER)"
ATC-68, "DIAGNOSTIC PROCEDURE FOR AIR MIX
Conditions
: Engine running and at normal operating temperature
TROUBLE DIAGNOSIS
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ATC
2007 Pathfinder
If OK, continue the check.
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
. If air mix door motor appears to be malfunctioning, go to
CEDURE FOR AIR MIX DOOR MOTOR (DRIVER)"
or
ATC-68, "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).
NOTE:
If current mode setting is DEF or D/F compressor clutch may already be engaged.
If NG, go to trouble diagnosis procedure for
ATC-97, "Magnet Clutch Circuit"
.
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-vehi-
cle, and set temperatures.)
If NG, go to trouble diagnosis procedure for
ATC-55, "Power Supply and Ground Circuit for Front Air Control"
,
then if necessary, trouble diagnosis procedure for
ATC-97, "Magnet Clutch Circuit"
.
If all operational checks are OK (symptom cannot be duplicated), go to malfunction simulation tests in
"How to Perform Trouble Diagnosis for Quick and Accurate Repair"
and perform tests as outlined to simulate
driving conditions environment. If symptom appears, refer to
ATC-34, "How to Perform Trouble Diagnosis for
,
and perform applicable trouble diagnosis proce-
dures.
ATC-54
TROUBLE DIAGNOSIS
2007 Pathfinder
Operational Check (Rear)
EJS004P3
The purpose of the operational check is to confirm that the system operates properly.
CHECKING BLOWER
1.
Turn the rear blower control dial counterclockwise to switch position "1". Fan should operate on low
speed.
2.
Turn the rear blower control dial clockwise to switch positions "2", "3", and "4" until all speeds are
checked.
3.
Leave fan on maximum speed.
If NG, go to trouble diagnosis procedure for
ATC-83, "Rear Blower Motor Circuit"
If OK, continue the check.
CHECKING TEMPERATURE DECREASE
1.
Rotate temperature and mode dial fully counterclockwise.
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
. If air mix door motor appears to be malfunctioning, go to
CEDURE FOR AIR MIX DOOR MOTOR (REAR)"
.
If OK, continue the check.
CHECKING TEMPERATURE INCREASE
1.
Rotate temperature and mode dial clockwise.
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
. If air mix door motor appears to be malfunctioning, go to
CEDURE FOR AIR MIX DOOR MOTOR (REAR)"
.
If OK, continue the check.
Conditions
: Engine running and at normal operating temperature
TROUBLE DIAGNOSIS
ATC-55
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ATC
2007 Pathfinder
Power Supply and Ground Circuit for Front Air Control
EJS004P4
SYMPTOM: A/C system does not come on.
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - AUTO MODE
1.
Press AUTO switch.
2.
Display should indicate AUTO. Confirm that the compressor clutch engages (sound or visual inspection).
(Discharge air and blower speed will depend on ambient, in-vehicle and set temperatures.)
Can a symptom be duplicated?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
PERFORM COMPLETE OPERATIONAL CHECK
Perform a complete operational check and check for any symptoms. Refer to
Can a symptom be duplicated?
YES
>> Refer to
NO
>> System OK.
3.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.
CHECK POWER AND GROUND CIRCUIT
Check main power supply and ground circuit. Refer to
ATC-56, "DIAGNOSTIC PROCEDURE FOR A/C SYS-
OK or NG
OK
>> System OK.
NO
>> Replace front air control. Refer to
.
ATC-56
TROUBLE DIAGNOSIS
2007 Pathfinder
COMPONENT DESCRIPTION
Front Air Control
The front air control has a built-in microcomputer which processes
information sent from various sensors needed for air conditioner
operation. The air mix door motors, mode door motor, intake door
motor, blower motor and compressor are then controlled.
The front air control is unitized with control mechanisms. When the
various switches and temperature dials are operated, data is input to
the front air control.
Self-diagnostic functions are also built into the front air control to pro-
vide quick check of malfunctions in the auto air conditioner system.
Potentio Temperature Control (PTC)
There are two PTCs (passenger and driver) built into the front air
control. They can be set at an interval of 0.5
°
C (1.0
°
F) in the 16
°
C
(60
°
F) to 32
°
C (90
°
F) temperature range by rotating the temperature
dial. The set temperature is displayed.
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM
SYMPTOM: A/C system does not come on.
WJIA1075E
WJIA1050E
WJIA1461E
TROUBLE DIAGNOSIS
ATC-57
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2007 Pathfinder
1.
CHECK POWER SUPPLY CIRCUITS FOR FRONT AIR CONTROL
1.
Disconnect front air control connector.
2.
Check voltage between front air control harness connector M49
terminals 6 and 19, and ground.
OK or NG
OK
>> GO TO 2.
NG
>> Check 10A fuses [Nos. 8 and 19, located in the fuse block (J/B)]. Refer to
.
●
If fuses are OK, check harness for open circuit. Repair or replace as necessary.
●
If fuses are NG, replace fuse and check harness for short circuit. Repair or replace as neces-
sary.
2.
CHECK GROUND CIRCUIT FOR FRONT AIR CONTROL
1.
Turn ignition switch OFF.
2.
Check continuity between front air control harness connector
M49 terminal 20 and ground.
OK or NG
OK
>> Replace front air control. Refer to
NG
>> Repair harness or connector.
Terminals
Ignition switch position
(+)
(-)
OFF
ACC
ON
Front air
control
connector
Terminal No.
M49
6
Ground
Approx. 0V
Approx. 0V
Battery
voltage
M49
19
Battery
voltage
Battery
voltage
Battery
voltage
WJIA1082E
20 - Ground
: Continuity should exist.
WJIA1239E
ATC-58
TROUBLE DIAGNOSIS
2007 Pathfinder
Mode Door Motor Circuit
EJS004P5
SYMPTOM:
●
Air outlet does not change.
●
Mode door motor does not operate normally.
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - DISCHARGE AIR
1.
Press mode switch four times and then press the
(DEF) switch. Each position indicator should change
shape (on display).
2.
Confirm that discharge air comes out according to the air distribution table. Refer to
NOTE:
Confirm that the compressor clutch is engaged (visual inspection) and intake door position is at FRESH
when DEF (
) or D/F (
) is selected.
Can a symptom be duplicated?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
PERFORM COMPLETE OPERATIONAL CHECK
Perform a complete operational check and check for any symptoms. Refer to
.
Can a symptom be duplicated?
YES
>> Refer to
.
NO
>> System OK.
3.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.
CHECK MODE DOOR OPERATION
Check and verify mode door mechanism for smooth operation in each mode.
OK or NG
OK
>> GO TO 5.
NG
>> Repair as necessary.
5.
PERFORM SELF-DIAGNOSIS
Perform self-diagnosis to check for any codes. Refer to
ATC-50, "A/C System Self-diagnosis Function"
.
Are any self-diagnosis codes present?
YES
>> Refer to
ATC-51, "SELF-DIAGNOSIS CODE CHART"
.
NO
>> GO TO 6.
6.
CHECK THE MODE DOOR MOTOR PBR CIRCUIT
Perform diagnostic procedure for the mode door motor. Refer to
ATC-61, "DIAGNOSTIC PROCEDURE FOR
OK or NG
OK
>> GO TO 7.
NG
>> Repair PBR circuit or replace motor.
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