Nissan Frontier D40. Instruction — part 750
BLOWER MOTOR
HAC-103
< COMPONENT DIAGNOSIS >
[MANUAL A/C (TYPE 2)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Check continuity between terminals by supplying 12 volts and
ground to coil side terminals of relay.
Front Blower Motor
Confirm smooth rotation of the blower motor.
• Ensure that there are no foreign particles inside the blower unit.
• Apply 12 volts to terminal 2 and ground to terminal 1 and verify that
the motor operates freely and quietly.
Front Blower Switch
Check continuity between terminals at each front blower speed posi-
tion.
Front Blower Motor Resistor
LJIA0068E
WJIA1508E
WJIA0508E
HAC-104
< COMPONENT DIAGNOSIS >
[MANUAL A/C (TYPE 2)]
BLOWER MOTOR
Check continuity between terminals. There will be resistance, but
there should not be an open or short between any two terminals.
WJIA0971E
MAGNET CLUTCH
HAC-105
< COMPONENT DIAGNOSIS >
[MANUAL A/C (TYPE 2)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
MAGNET CLUTCH
System Description
INFOID:0000000005275938
SYSTEM DESCRIPTION
The front air control controls compressor operation based on intake temperature and a signal from ECM.
Low Temperature Protection Control
The front air control will turn the compressor ON or OFF as determined by a signal detected by the intake sen-
sor.
When intake air temperature is higher than 3.5
°
C (38.3
°
F), the compressor turns ON. The compressor turns
OFF when intake air temperature is lower than 2.5
°
C (36.5
°
F).
Magnet Clutch Component Function Check
INFOID:0000000005275939
SYMPTOM: Magnet clutch does not engage.
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - MAGNET CLUTCH
1.
Rotate blower control dial clockwise.
2.
Rotate mode dial to vent (
) position.
3.
Press A/C switch. 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-105, "Magnet Clutch Diagnosis Procedure"
.
Magnet Clutch Diagnosis Procedure
INFOID:0000000005275940
Regarding Wiring Diagram information, refer to
HAC-117, "Wiring Diagram - Air Conditioner Control - Without
DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH
SYMPTOM: Magnet clutch does not engage when A/C switch is ON.
1.
PERFORM IPDM E/R AUTO ACTIVE TEST
PCS-15, "CONSULT - III Function (IPDM E/R)"
.
Does magnet clutch operate?
YES
>> •
WITH CONSULT-III
GO TO 2.
WJIA1490E
HAC-106
< COMPONENT DIAGNOSIS >
[MANUAL A/C (TYPE 2)]
MAGNET CLUTCH
•
WITHOUT CONSULT-III
GO TO 8.
NO
>> Check 10A fuse (No. 42, located in IPDM E/R), and GO TO 12.
2.
CHECK BCM INPUT (A/C COMPRESSOR ON) SIGNAL
Check A/C compressor ON/OFF signal. Refer to
HAC-85, "CONSULT-III Function (BCM - AIR CONDI-
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 8.
3.
CHECK REFRIGERANT PRESSURE SENSOR
Check refrigerant pressure sensor. Refer to
(VQ40DE).
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace refrigerant pressure sensor. Refer to
HA-38, "Removal and Installation for Refrigerant
4.
CHECK BCM INPUT (FAN ON) SIGNAL
Check FAN ON/OFF signal. Refer to
BCS-21, "AIR CONDITIONER : CONSULT-III Function (BCM - AIR CON-
.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 5.
5.
CHECK CIRCUIT CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL
1.
Turn ignition switch OFF.
2.
Disconnect BCM connector and front air control connector.
3.
Check continuity between BCM harness connector M18 (A) ter-
minal 28 and front air control harness connector M49 (B) termi-
nal 18.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
6.
CHECK VOLTAGE FOR FRONT AIR CONTROL (FAN ON SIGNAL)
A/C SW ON
: AIR COND SW ON
A/C SW OFF
: AIR COND SW OFF
BLOWER CONTROL DIAL
ON
: FAN ON SIG ON
BLOWER CONTROL DIAL
OFF
: FAN ON SIG OFF
A
B
Connector
Terminal Connector
Terminal
Continuity
BCM: M18
28
Front air control:
M49
18
Yes
WJIA1627E
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