Nissan Frontier. Instruction — part 893
HAC-126
< 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 M50
(A) terminal 26.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK INTAKE SENSOR
HAC-126, "Intake Sensor Component Inspection"
.
Is the inspection result normal?
YES
>> Replace front air control. Refer to
VTL-7, "Removal and Installation"
.
NO
>> Replace intake sensor. Refer to
VTL-10, "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 M50
(A) terminal 11.
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-7, "Removal and Installation"
.
NO
>> Repair harness or connector.
Intake Sensor Component Inspection
INFOID:0000000009478353
COMPONENT INSPECTION
Intake Sensor
After disconnecting intake sensor connector, measure resistance between terminals 1 and 2 at sensor har-
ness side, using the table below.
1 - 26
: Continuity should exist.
AWIIA0434ZZ
2 - 11
: Continuity should exist.
2 - Ground
: Continuity should not exist.
AWIIA0435ZZ
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
INTAKE SENSOR
HAC-127
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
If NG, replace intake sensor. Refer to
VTL-10, "Removal and Installation"
40 (104)
16.1
45 (113)
13.2
Temperature
°C (°F)
Resistance k
Ω
HAC-128
< 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:0000000009478354
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, blower motor and 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 dial.
Front Air Control Component Function Check
INFOID:0000000009478355
SYMPTOM: A/C system does not come on.
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK
1. Turn blower motor ON, then press A/C switch.
2. Confirm that the compressor clutch engages (sound or visual inspection).
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Go to diagnosis procedure. Refer to
HAC-128, "Front Air Control Power and Ground Diagnosis
.
Front Air Control Power and Ground Diagnosis Procedure
INFOID:0000000009478356
Regarding Wiring Diagram information, refer to
HAC-133, "Wiring Diagram - With Type 1"
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM
AWIIA1217ZZ
AWIIA0481ZZ
POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
HAC-129
< 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 OFF.
2. Disconnect front air control connector.
3. Turn ignition switch ON.
4. Check voltage between front air control harness connector M59 terminal 27 and M50 terminal 15, 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. Check continuity between front air control harness connector M59 terminal 35 and ground.
Is the inspection result normal?
YES
>> Replace front air control. Refer to
VTL-7, "Removal and Installation"
.
NO
>> Repair harness or connector.
AWIIA1786GB
Terminals
Ignition switch position
(+)
(-)
OFF
ACC
ON
Front air
control
connector
Terminal No.
M50
15
Ground
Approx. 0V
Approx. 0V
Battery
voltage
M59
27
Battery
voltage
Battery
voltage
Battery
voltage
35 - Ground
: Continuity should exist.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст