Nissan Pathfinder (2012 year). Manual — part 430
HAC-162
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
MAGNET CLUTCH
1. Reconnect BCM connector and front air control connector.
2. Turn ignition switch ON.
3. Turn A/C switch ON.
4. Check voltage between front air control harness connector M52
terminal 18 and ground.
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-53, "Removal and Installation"
NO-1 >> If the voltage is approx. 5V when blower motor is ON, replace front air control. Refer to
.
NO-2 >> If the voltage is approx. 0V when blower motor is OFF, replace BCM. Refer to
.
7.
CHECK CAN COMMUNICATION
Check CAN communication. Refer to
LAN-14, "Trouble Diagnosis Flow Chart"
.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair or replace malfunctioning part(s).
8.
CHECK VOLTAGE FOR FRONT AIR CONTROL (A/C COMPRESSOR ON SIGNAL)
1. Reconnect BCM connector and front air control connector.
2. Turn ignition switch ON.
3. Check voltage between front air control harness connector M52
terminal 10 and ground.
Is the inspection result normal?
YES
>> GO TO 9.
NO-1 >> If the voltage is approx. 5V when A/C switch is ON, replace front air control. Refer to
.
NO-2 >> If the voltage is approx. 0V when A/C switch is OFF, replace BCM. Refer to
.
9.
CHECK CIRCUIT CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL
1. Disconnect BCM connector and front air control connector.
2. Check continuity between BCM harness connector M18 terminal 27 and front air control harness connec-
tor M52 terminal 10.
3. Check continuity between BCM harness connector M18 terminal 27 and ground.
Terminals
Condition
Voltage
(Approx.)
(+)
(-)
Front air con-
trol connector
Terminal
No.
M52
18
Ground
A/C switch: ON
Blower motor
operates
0V
A/C switch: OFF
Battery voltage
WJIA1628E
Terminals
Condition
Voltage
(Approx.)
(+)
(-)
Front air
control con-
nector
Terminal No.
M52
10
Ground
A/C switch: ON
Approx. 0V
A/C switch:
OFF
Approx. 5V
WJIA1137E
27 - 10
: Continuity should exist.
August 2012
2012 Pathfinder
MAGNET CLUTCH
HAC-163
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair harness or connector.
10.
CHECK INTAKE SENSOR CIRCUITS
Check intake sensor. Refer to
VTL-11, "Removal and Installation"
.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Replace intake sensor. Refer to
VTL-11, "Removal and Installation"
.
11.
CHECK CAN COMMUNICATION
Check CAN communication. Refer to
LAN-14, "Trouble Diagnosis Flow Chart"
.
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-53, "Removal and Installation"
NO
>> Repair or replace malfunctioning part(s).
12.
CHECK MAGNET CLUTCH CIRCUIT
Check for operation sound when applying battery voltage to terminal.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> Replace magnet clutch. Refer to
Installation for Compressor Clutch"
13.
CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND A/C COMPRESSOR
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and A/C compressor (magnet clutch) connector.
3. Check continuity between IPDM E/R harness connector E119 terminal 11 and A/C compressor harness
connector F3 terminal 1.
4. Check continuity between IPDM E/R harness connector E119 terminal 11 and ground.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-29, "Removal and Installation of IPDM E/R"
.
NO
>> Repair harness or connector.
27 - ground
: Continuity should not exist.
WJIA1472E
11 – 1
: Continuity should exist.
11 – ground
: Continuity should not exist.
August 2012
2012 Pathfinder
HAC-164
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
INTAKE SENSOR
INTAKE SENSOR
System Description
INFOID:0000000007356441
COMPONENT DESCRIPTION
Intake Sensor
The intake sensor is located on top of the heater and cooling unit
assembly next to the A/C evaporator cover. It converts temperature
of air after it passes through the evaporator into a resistance value
which is then input to the front air control.
Intake Sensor Diagnosis Procedure
INFOID:0000000007356442
Regarding Wiring Diagram information, refer to
HAC-172, "Wiring Diagram - Manual"
.
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
WJIA1155E
WJIA1156E
2 - Ground
: Approx. 5V
AWIIA0892ZZ
August 2012
2012 Pathfinder
INTAKE SENSOR
HAC-165
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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 (A) terminal 1 and front air control harness connector M52
(B) terminal 13.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK INTAKE SENSOR
HAC-165, "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-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 M52
(A) terminal 12.
4. Check continuity between intake sensor harness connector
M146 (A) 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:0000000007356443
COMPONENT INSPECTION
Intake Sensor
1 - 13
: Continuity should exist.
AWIIA0896ZZ
2 - 12
: Continuity should exist.
2 - Ground
: Continuity should not exist.
AWIIA0861ZZ
August 2012
2012 Pathfinder
HAC-166
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
INTAKE SENSOR
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
WJIA1159E
August 2012
2012 Pathfinder
POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
HAC-167
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
Component Description
INFOID:0000000007356444
COMPONENT DESCRIPTION
Front Air Control
The front air control (1) has a built-in microcomputer which pro-
cesses information sent from various sensors needed for air condi-
tioner operation. The air mix door motor, mode door motor, intake
door motor, defroster 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:0000000007356445
SYMPTOM: A/C system does not come on.
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK
1. Turn blower control dial to position 1-4, 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-167, "Front Air Control Power and Ground Diagnosis
.
Front Air Control Power and Ground Diagnosis Procedure
INFOID:0000000007356446
Regarding Wiring Diagram information, refer to
HAC-172, "Wiring Diagram - Manual"
.
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM
AWIIA1197ZZ
WJIA1311E
August 2012
2012 Pathfinder
HAC-168
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
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 M52
terminals 6 and 19, 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
M52 terminal 20 and ground.
Is the inspection result normal?
YES
>> Replace front air control. Refer to
NO
>> Repair harness or connector.
WJIA1461E
Terminals
Ignition switch position
(+)
(-)
OFF
ACC
ON
Front air
control
connector
Terminal No.
M52
6
Ground
Approx. 0V
Approx. 0V
Battery
voltage
M52
19
Battery
voltage
Battery
voltage
Battery
voltage
AWIIA0863ZZ
20 - Ground
: Continuity should exist.
AWIIA0864ZZ
August 2012
2012 Pathfinder
AIR CONDITIONER CONTROL
HAC-169
< ECU DIAGNOSIS INFORMATION >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
ECU DIAGNOSIS INFORMATION
AIR CONDITIONER CONTROL
System Description
INFOID:0000000007356447
The front air control provides regulation of the vehicle's interior temperature. The system is based on the posi-
tion of the front air controls temperature switch selected by the driver. This is done by utilizing a microcom-
puter, also referred to as the front air control, which receives input signals from the following two sensors:
• Intake sensor
• PBR (position balanced resistor)
The front air control uses these signals (including the set position of the temperature switch) to control:
• Outlet air volume
• Air temperature
• Air distribution
System Operation
INFOID:0000000007356448
AIR MIX DOOR CONTROL
The air mix door is controlled so that in-vehicle temperature changed based on the position of the temperature
control dial.
BLOWER SPEED CONTROL
Blower speed is controlled based on front blower switch settings.
When blower switch is turned, the blower motor starts and increases air flow volume each time the blower
switch is turned counterclockwise, and decreases air flow volume each time the blower switch is turned coun-
terclockwise.
When engine coolant temperature is low, the blower motor operation is delayed to prevent cool air from flow-
ing.
INTAKE DOORS CONTROL
The intake doors are controlled by the recirculation switch setting, and the mode (defroster) switch setting.
MODE DOOR CONTROL
The mode door is controlled by the position of the mode dial.
DEFROSTER DOOR CONTROL
The defroster door is controlled by the defroster dial set to defroster.
MAGNET CLUTCH CONTROL
When the A/C switch is pressed, or the mode dial is turned to the defroster position, the front air control out-
puts a compressor ON signal to BCM.
The BCM then sends a compressor ON signal to ECM, via CAN communication line.
WJIA1293E
August 2012
2012 Pathfinder
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст