Nissan Titan A60. Instruction — part 616
INTAKE SENSOR
HAC-147
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
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INTAKE SENSOR
System Description
INFOID:0000000006164778
COMPONENT DESCRIPTION
Intake Sensor
The intake sensor is located on the heater & cooling unit assembly. It
converts temperature of air after if passes through the evaporator
into a resistance value which is then input to the front air control.
Intake Sensor Diagnosis Procedure
INFOID:0000000006164779
Regarding Wiring Diagram information, refer to
HAC-155, "Wiring Diagram - Instruction With 2 Control Dial Sys-
DIAGNOSTIC PROCEDURE FOR INTAKE SENSOR
SYMPTOM: Intake sensor circuit is open or shorted.
1.
CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND
1. Disconnect intake sensor connector.
2. Turn ignition switch ON.
3. Check voltage between intake sensor harness connector M146
terminal 2 and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL
WJIA0571E
AWIIA0433GB
2 - Ground
: Approx. 5V
WJIA1375E
HAC-148
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
INTAKE SENSOR
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between intake sensor harness connector
M146 (B) terminal 1 and front air control harness connector
M180 (A) terminal 26.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK INTAKE SENSOR
Check intake sensor. Refer to
HAC-148, "Intake Sensor Component Inspection"
Is the inspection result normal?
YES
>> 1. Replace front air control. Refer to
VTL-8, "Removal and Installation"
.
2. Go to
HAC-114, "Front Air Control Self-Diagnosis"
and perform self-diagnosis.
NO
>> 1. Replace intake sensor. Refer to
VTL-11, "Removal and Installation"
.
2. Go to
HAC-114, "Front Air Control Self-Diagnosis"
and perform self-diagnosis.
4.
CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between intake sensor harness connector
M146 (B) terminal 2 and front air control harness connector
M180 (A) terminal 11.
4. Check continuity between intake sensor harness connector
M146 (B) terminal 2 and ground.
Is the inspection result normal?
YES
>> 1. Replace front air control. Refer to
VTL-8, "Removal and Installation"
.
2. Go to
HAC-114, "Front Air Control Self-Diagnosis"
and perform self-diagnosis.
NO
>> Repair harness or connector.
Intake Sensor Component Inspection
INFOID:0000000006164780
COMPONENT INSPECTION
Intake Sensor
1 - 26
: Continuity should exist.
AWIIA0434ZZ
2 - 11
: Continuity should exist.
2 - Ground
: Continuity should not exist.
AWIIA0435ZZ
INTAKE SENSOR
HAC-149
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
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After disconnecting intake sensor connector, measure resistance
between terminals 1 and 2 at sensor harness side, using the table
below.
If NG, replace intake sensor. Refer to
VTL-11, "Removal and Installa-
.
Temperature
°C (°F)
Resistance k
Ω
−15 (5)
209.0
−10 (14)
160.0
−5 (23)
123.0
0 (32)
95.8
5 (41)
74.9
10 (50)
58.9
15 (59)
46.7
20 (68)
37.3
25 (77)
30.0
30 (86)
24.2
35 (95)
19.7
40 (104)
16.1
45 (113)
13.2
WJIA1378E
HAC-150
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
Component Description
INFOID:0000000006164781
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 motor, mode door motor, intake door
motor, defroster door motor, blower motor and A/C 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.
Potentio Temperature Control (PTC)
The PTC is built into the front air control. It can be set from cold to
hot or any intermediate position by rotating the temperature control
dial.
Front Air Control Component Function Check
INFOID:0000000006164782
SYMPTOM: A/C system does not come on.
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - AUTO MODE
1. Turn the blower control dial clockwise to low speed.
2. Press the A/C Turn the blower control dial clockwise to low speed.
3. Confirm that the compressor clutch engages (sound or visual inspection). (Discharge air and blower
speed will depend on ambient, in-vehicle and set temperatures.)
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Go to diagnosis procedure. Refer to
HAC-150, "Front Air Control Power and Ground Diagnosis
.
Front Air Control Power and Ground Diagnosis Procedure
INFOID:0000000006164783
Regarding Wiring Diagram information, refer to
HAC-155, "Wiring Diagram - Instruction With 2 Control Dial Sys-
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM
AWIIA0551ZZ
AWIIA0481ZZ
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