Nissan Titan. Instruction — part 411
INTAKE SENSOR
HAC-149
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
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:0000000009882543
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:0000000009882544
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:0000000009882545
Regarding Wiring Diagram information, refer to
HAC-155, "Wiring Diagram - Instruction With 2 Control Dial Sys-
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM
AWIIA0551ZZ
ALIIA0692ZZ
POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
HAC-151
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
SYMPTOM: A/C system does not come on.
1.
CHECK POWER SUPPLY CIRCUITS FOR FRONT AIR CONTROL
1. Turn ignition switch ON.
2. Check voltage between front air control harness connector
M180 (B) terminal 15 and M181 (A) terminal 27, and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> 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. Disconnect front air control connectors.
3. Check continuity between front air control harness connector
M181 terminal 35 and ground.
Is the inspection result normal?
OK
>> Replace front air control. Refer to
NG
>> Repair harness or connector.
AWIIA0438GB
Terminals
Ignition switch position
(+)
(-)
OFF
ACC
ON
Front air
control
connector
Terminal No.
M180
15
Ground
Approx. 0V
Approx. 0V
Battery
voltage
M181
27
Battery
voltage
Battery
voltage
Battery
voltage
AWIIA1047ZZ
35 - Ground
: Continuity should exist.
AWIIA0440ZZ
HAC-152
< ECU DIAGNOSIS INFORMATION >
[MANUAL A/C (TYPE 1)]
MANUAL A/C IDENTIFICATION TABLE
ECU DIAGNOSIS INFORMATION
MANUAL A/C IDENTIFICATION TABLE
Application Table
INFOID:0000000009882546
Instruction A/C Type
Description
Visual Identification
Instruction A/C (Type 1)
Two Control Dial System
Instruction A/C (Type 2)
Three Control Dial System
[with variable blower control
(VBC)]
ALIIA0692ZZ
AWIIA0478ZZ
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