Nissan Pathfinder (2005 year). Instruction — part 58
TROUBLE DIAGNOSIS
ATC-111
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ATC
2005 Pathfinder
Self-diagnosis
EJS002XE
SYMPTOM: Self-diagnosis cannot be performed.
INSPECTION FLOW
*1
ATC-56, "Power Supply and Ground
Circuit for Front Air Control"
.
*2
ATC-113, "Ambient Sensor 1 Cir-
cuit"
.
*3
ATC-116, "In-vehicle Sensor Circuit"
*4
ATC-120, "Optical Sensor Circuit"
.
*5
ATC-122, "Intake Sensor Circuit"
*6
ATC-63, "Air Mix Door Motor Circuit"
*7
ATC-52, "Operational Check
(Front)"
*8
.
WJIA1063E
ATC-112
TROUBLE DIAGNOSIS
2005 Pathfinder
Memory Function
EJS002XF
SYMPTOM: Memory function does not operate.
INSPECTION FLOW
*1
ATC-56, "Power Supply and Ground
Circuit for Front Air Control"
*2
ATC-52, "Operational Check
(Front)"
*3
ATC-50, "A/C System Self-diagnosis
Function"
*4
ATC-51, "SELF-DIAGNOSIS CODE
CHART"
WJIA1287E
TROUBLE DIAGNOSIS
ATC-113
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ATC
2005 Pathfinder
Ambient Sensor 1 Circuit
EJS002XH
COMPONENT DESCRIPTION
Ambient Sensor 1
Ambient sensor 1 is attached to the radiator core support (left side).
It detects ambient temperature and converts it into a resistance
value which is then input into the front air control.
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 front air control as a result of conducting 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.
LJIA0170E
WJIA1141E
1 - Ground
: Approx. 5V
WJIA1273E
ATC-114
TROUBLE DIAGNOSIS
2005 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
Refer to
.
OK or NG
OK
>> 1. Replace front air control.
2. Go to self-diagnosis
ATC-50, "A/C System Self-diagnosis Function"
and perform self-diagno-
sis.
NG
>> 1. Replace ambient sensor 1.
2. Go to self-diagnosis
ATC-50, "A/C System Self-diagnosis Function"
and perform self-diagno-
sis.
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 terminal 1 and front air control harness connector M50 termi-
nal 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 self-diagnosis
ATC-50, "A/C System Self-diagnosis Function"
and perform self-diagno-
sis.
NG
>> Repair harness or connector.
2 - 13
: Continuity should exist.
WJIA1274E
1 - 28
: Continuity should exist.
1 - Ground
: Continuity should not exist.
WJIA1275E
TROUBLE DIAGNOSIS
ATC-115
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ATC
2005 Pathfinder
COMPONENT INSPECTION
Ambient Sensor 1
After disconnecting ambient sensor 1 connector E1, measure resis-
tance between terminals 1 and 2 at sensor component side, using
the table below.
If NG, replace ambient sensor 1.
Temperature
°
C (
°
F)
Resistance k
Ω
−
15 (5)
12.73
−
10 (14)
9.92
−
5 (23)
7.80
0 (32)
6.19
5 (41)
4.95
10 (50)
3.99
15 (59)
3.24
20 (68)
2.65
25 (77)
2.19
30 (86)
1.81
35 (95)
1.51
40 (104)
1.27
45 (113)
1.07
WJIA1276E
ATC-116
TROUBLE DIAGNOSIS
2005 Pathfinder
In-vehicle Sensor Circuit
EJS002XI
COMPONENT DESCRIPTION
In-vehicle Sensor
The in-vehicle sensor is located on instrument lower driver panel. It
converts variations in temperature of passenger compartment air
(drawn in through the integrated fan) into a resistance value. It is
then input into the front air control.
WJIA1145E
WJIA0606E
TROUBLE DIAGNOSIS
ATC-117
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ATC
2005 Pathfinder
DIAGNOSTIC PROCEDURE FOR IN-VEHICLE SENSOR
SYMPTOM: In-vehicle sensor circuit is open or shorted. (44 or 46 is
indicated on front air control as a result of conducting self-diagnosis.)
1.
CHECK IN-VEHICLE SENSOR CIRCUIT
Are diagnostic codes 44 or 46 present?
YES or NO
YES
>> GO TO 6.
NO
>> GO TO 2.
2.
CHECK VOLTAGE BETWEEN IN-VEHICLE SENSOR AND GROUND
1.
Disconnect in-vehicle sensor connector.
2.
Turn ignition switch ON.
3.
Check voltage between in-vehicle sensor harness connector
M32 terminal 4 and ground.
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 5.
3.
CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND FRONT AIR CONTROL
1.
Turn ignition switch OFF.
2.
Disconnect front air control connector M49.
3.
Check continuity between in-vehicle sensor harness connector
M32 terminal 1 and front air control harness connector M49 ter-
minal 13.
OK or NG
OK
>> GO TO 4.
NG
>> Repair harness or connector.
4.
CHECK IN-VEHICLE SENSOR
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 in-vehicle sensor. Refer to
.
2. Go to
ATC-50, "A/C System Self-diagnosis Function"
and perform self-diagnosis.
WJIA1146E
4 - Ground
: Approx. 5V.
LJIA0089E
1 - 13
: Continuity should exist.
WJIA1147E
ATC-118
TROUBLE DIAGNOSIS
2005 Pathfinder
5.
CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND FRONT AIR CONTROL
1.
Turn ignition switch OFF.
2.
Disconnect front air control connector.
3.
Check continuity between in-vehicle sensor harness connector
M32 terminal 4 and front air control harness connector M50 ter-
minal 27.
4.
Check continuity between in-vehicle sensor harness connector
M32 terminal 4 and ground.
OK or NG
OK
>> 1. Replace front air control. Refer to
.
2. Go to self-diagnosis
ATC-50, "A/C System Self-diagnosis Function"
and perform self-diagno-
sis.
NG
>> Repair harness or connector.
6.
CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR MOTOR AND FRONT AIR CON-
TROL (SELF-DIAGNOSIS CODES 44 OR 46)
1.
Turn ignition switch OFF.
2.
Disconnect front air control connector and in-vehicle sensor con-
nector.
3.
Check continuity between in-vehicle sensor harness connector
M32 terminal 2 and 3 and front air control harness connector
M50 terminal 34 and 33.
4.
Check continuity between in-vehicle sensor harness connector
M32 terminal 2 and 3 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.
4 - 27
: Continuity should exist.
4 - Ground
: Continuity should not exist.
WJIA1148E
2 - 34
: Continuity should exist.
3 - 33
: Continuity should exist.
2, 3 - Ground
: Continuity should not exist.
WJIA1149E
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