Nissan Pathfinder (2007 year). Manual — part 58
TROUBLE DIAGNOSIS
ATC-115
C
D
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A
B
ATC
2007 Pathfinder
5.
CHECK HEATER PUMP MOTOR POWER CIRCUIT
1.
Turn ignition switch OFF.
2.
Check continuity between heater pump relay harness connector
(A) E144 terminal 3 and heater pump harness connector (B)
E141 terminal 1.
3.
Check continuity between heater pump relay harness connector
(A) E144 terminal 3 and ground.
OK or NG
OK
>> GO TO 6.
NG
>> Repair harness or connector.
6.
CHECK CIRCUIT BETWEEN HEATER PUMP RELAY AND FRONT AIR CONTROL
1.
Disconnect front air control connector.
2.
Check continuity between front air control harness connector (A)
M50 terminal 44 and heater pump relay harness connector (B)
E144 terminal 1.
3.
Check continuity between heater pump relay harness connector
(B) E144 terminal 1 and ground.
OK or NG
OK
>> Replace front air control. Refer to
.
NG
>> Repair harness or connector.
COMPONENT INSPECTION
Heater Pump Relay
Check continuity between terminals 3 and 5.
If NG, replace relay.
3 - 1
: Continuity should exist.
3 - Ground
: Continuity should not exist.
WJIA1987E
1 - 44
: Continuity should exist.
1 - Ground
: Continuity should not exist.
WJIA1988E
Conditions
Continuity
12V direct current supply between terminals 1 and 2
Yes
No current supply
No
LHA160
ATC-116
TROUBLE DIAGNOSIS
2007 Pathfinder
Noise
EJS004PE
SYMPTOM: Noise
INSPECTION FLOW
WJIA1972E
TROUBLE DIAGNOSIS
ATC-117
C
D
E
F
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H
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M
A
B
ATC
2007 Pathfinder
*1
*2
*3
ATC-22, "Maintenance of Oil Quan-
tity in Compressor"
*4
ATC-52, "Operational Check (Front)"
*5
ATC-118
TROUBLE DIAGNOSIS
2007 Pathfinder
Self-diagnosis
EJS004PF
SYMPTOM: Self-diagnosis cannot be performed.
INSPECTION FLOW
1.
CONFIRM AUTO MODE OPERATION
1.
Press the AUTO switch.
2.
Display should indicate AUTO. (Discharge air and blower speed will depend on ambient, in-vehicle and
set temperatures.)
OK or NG
OK
>> GO TO 2.
NG
>> GO TO 3.
2.
PERFORM COMPLETE OPERATIONAL CHECK (FRONT)
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.
Have any service bulletins been issued?
YES
>> Refer to appropriate service bulletin.
NO
>> 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
>> GO TO 5.
NG
>> Refer to
ATC-55, "Power Supply and Ground Circuit for Front Air Control"
5.
CHECK AMBIENT SENSOR CIRCUIT
Check ambient sensor circuit. Refer to
ATC-121, "Ambient Sensor 1 Circuit"
OK or NG
OK
>> GO TO 6.
NG
>> Repair or replace as necessary.
6.
CHECK IN-VEHICLE SENSOR CIRCUIT
Check in-vehicle sensor circuit. Refer to
ATC-124, "In-vehicle Sensor Circuit"
OK or NG
OK
>> GO TO 7.
NG
>> Repair or replace as necessary.
7.
CHECK OPTICAL SENSOR CIRCUIT
Check optical sensor circuit. Refer to
ATC-127, "Optical Sensor Circuit"
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace as necessary.
TROUBLE DIAGNOSIS
ATC-119
C
D
E
F
G
H
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L
M
A
B
ATC
2007 Pathfinder
8.
CHECK INTAKE SENSOR CIRCUIT
Check intake sensor circuit. Refer to
ATC-129, "Intake Sensor Circuit"
OK or NG
OK
>> GO TO 9.
NG
>> Repair or replace as necessary.
9.
CHECK AIR MIX DOOR MOTORS PBR CIRCUIT
Check air mix door motors PBR circuit. Refer to
ATC-63, "Air Mix Door Motor Circuit"
.
OK or NG
OK
>> GO TO 10.
NG
>> Repair or replace as necessary.
10.
RECHECK FOR SYMPTOMS
Perform a complete operational check for any symptoms. Refer to
ATC-52, "Operational Check (Front)"
Does another symptom exist?
YES
>> Refer to
NO
>> Replace front air control. Refer to
.
ATC-120
TROUBLE DIAGNOSIS
2007 Pathfinder
Memory Function
EJS004PG
SYMPTOM: Memory function does not operate.
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - MEMORY FUNCTION
1.
Set the temperature to 32
°
C (90
°
F).
2.
Rotate the front blower control dial (driver) to turn system 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.
Rotate the front blower control dial (driver) to turn system OFF.
Can the 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.
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 5.
5.
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
>> GO TO 6.
NG
>> Repair or replace as necessary.
6.
RECHECK FOR SYMPTOMS
Perform a complete operational check for any symptoms. Refer to
ATC-52, "Operational Check (Front)"
.
Does another symptom exist?
YES
>> Refer to
.
NO
TROUBLE DIAGNOSIS
ATC-121
C
D
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F
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M
A
B
ATC
2007 Pathfinder
Ambient Sensor 1 Circuit
EJS004PH
COMPONENT DESCRIPTION
Ambient Sensor 1
Ambient sensor 1 (1) is attached to the radiator core support (left side). It detects ambient temperature and
converts it into a value which is then input into the front air control.
●
⇐
: Front
NOTE:
Both of the ambient sensors are located behind the front grille, below
the hood latch. The upper ambient sensor 1 (1) provides input for the
automatic A/C system. The lower ambient sensor 2 (2) provides
input for the compass/temperature driver information system.
AMBIENT TEMPERATURE INPUT PROCESS
The front air control includes a processing circuit for ambient sensor 1 input. However, when the temperature
detected by ambient sensor 1 increases quickly, the processing circuit retards the front air control function. It
only allows the front air control to recognize an ambient temperature increase of 0.33
°
C (0.6
°
F) per 100 sec-
onds.
This prevents constant adjustments due to momentary conditions, such as stopping after high speed driving.
Although the actual ambient temperature has not changed, the temperature detected by ambient sensor 1 will
increase. This is because the heat from the engine compartment can radiate to the front grille area, location of
ambient sensor 1.
DIAGNOSTIC PROCEDURE FOR AMBIENT SENSOR 1
SYMPTOM: Ambient sensor 1 circuit is open or shorted. [40 or 41 is
indicated on the navi screen (only if equipped) as a result of conduct-
ing the front air control self-diagnosis].
1.
CHECK VOLTAGE BETWEEN AMBIENT SENSOR 1 AND GROUND
1.
Disconnect ambient sensor 1 connector.
2.
Turn ignition switch ON.
3.
Check voltage between ambient sensor 1 harness connector E1
terminal 1 and ground.
OK or NG
OK
>> GO TO 2.
NG
>> GO TO 4.
LJIA0192E
WJIA1141E
1 - Ground
: Approx. 5V
WJIA1273E
ATC-122
TROUBLE DIAGNOSIS
2007 Pathfinder
2.
CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR 1 AND FRONT AIR CONTROL
1.
Turn ignition switch OFF.
2.
Disconnect front air control connector.
3.
Check continuity between ambient sensor 1 harness connector
E1 terminal 2 and front air control harness connector M49 termi-
nal 13.
OK or NG
OK
>> GO TO 3.
NG
>> Repair harness or connector.
3.
CHECK AMBIENT SENSOR 1
Check ambient sensor 1. Refer to
.
OK or NG
OK
>> 1. Replace front air control. Refer to
.
2. Go to
ATC-50, "A/C System Self-diagnosis Function"
and perform self-diagnosis.
NG
>> 1. Replace ambient sensor 1. Refer to
2. Go to
ATC-50, "A/C System Self-diagnosis Function"
and perform self-diagnosis.
4.
CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR 1 AND FRONT AIR CONTROL
1.
Turn ignition switch OFF.
2.
Disconnect front air control connector.
3.
Check continuity between ambient sensor 1 harness connector
E1 (B) terminal 1 and front air control harness connector M50
(A) terminal 28.
4.
Check continuity between ambient sensor 1 harness connector
E1 terminal 2 and ground.
OK or NG
OK
>> 1. Replace front air control. Refer to
.
2. Go to
ATC-50, "A/C System Self-diagnosis Function"
and perform self-diagnosis.
NG
>> Repair harness or connector.
2 - 13
: Continuity should exist.
WJIA1274E
A
B
Connector
Terminal Connector
Terminal
Continuity
Front air control:
M50
28
Ambient sensor 1:
E1
1
Yes
B
Continuity
Connector
Terminal
Ground
No
Ambient Sensor 1:
E1
1
WJIA1653E
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