Nissan Titan A60. Manual — part 635
WATER VALVE CIRCUIT
HAC-223
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 2)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
NO
>> Repair harness or connector.
3.
CHECK WATER VALVE POWER AND GROUND CIRCUITS
1. Rotate temperature control dial to maximum cold.
2. Check voltage between water valve harness connector F68 ter-
minal 1 and terminal 2 while rotating temperature control dial to
maximum heat.
Is the inspection result normal?
YES
>> Replace the water valve.
NO
>> GO TO 4.
4.
CHECK WATER VALVE CONTROL OUTPUT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front air control connector M177.
3. Check continuity between water valve harness connector F68
(A) terminal 1 and front air control harness connector M177 (B)
terminal 29.
4. Check continuity between water valve harness connector F68
(A) terminal 1 and ground.
Is the inspection result normal?
YES
>> Replace front air control. Refer to
VTL-8, "Removal and Installation"
.
NO
>> Repair harness or connector.
Connector
Terminals
Condition
Voltage
(Approx.)
(+) (-)
Water valve: F68
1
2
Rotate temperature
control dial
Battery
voltage
WJIA1792E
1 - 29
: Continuity should exist.
1 - Ground
: Continuity should not exist.
AWIIA0547ZZ
HAC-224
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 2)]
INTAKE SENSOR
INTAKE SENSOR
System Description
INFOID:0000000006164834
COMPONENT DESCRIPTION
Intake Sensor
The intake sensor (1) is located on the heater & cooling unit assem-
bly. It converts temperature of air after if passes through the evapo-
rator into a resistance value which is then input to the front air
control.
Intake Sensor Diagnosis Procedure
INFOID:0000000006164835
Regarding Wiring Diagram information, refer to
HAC-232, "Wiring Diagram - Manual With 3 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
AWIIA1083ZZ
AWIIA0548GB
2 - Ground
: Approx. 5V
WJIA1375E
INTAKE SENSOR
HAC-225
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 2)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
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
M176 (A) terminal 21.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK INTAKE SENSOR
Check intake sensor. Refer to
HAC-225, "Intake Sensor Component Inspection"
Is the inspection result normal?
YES
>> Replace front air control. Refer to
VTL-8, "Removal and Installation"
.
NO
>> Replace intake sensor. Refer to
VTL-11, "Removal and Installation"
.
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
M176 (A) terminal 9.
4. Check continuity between intake sensor harness connector
M146 (B) terminal 2 and ground.
Is the inspection result normal?
YES
>> Replace front air control. Refer to
VTL-8, "Removal and Installation"
.
NO
>> Repair harness or connector.
Intake Sensor Component Inspection
INFOID:0000000006164836
COMPONENT INSPECTION
Intake Sensor
1 - 21
: Continuity should exist.
AWIIA0549ZZ
2 - 9
: Continuity should exist.
2 - Ground
: Continuity should not exist.
AWIIA0550ZZ
HAC-226
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 2)]
INTAKE SENSOR
After disconnecting intake sensor (1) 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
AWIIA1084ZZ
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