Nissan Titan A60. Manual — part 613
BLOWER MOTOR CONTROL SYSTEM
HAC-135
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
C
D
E
F
G
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K
L
M
A
B
HAC
N
O
P
Check continuity between front blower motor harness connector
M62 (B) terminal 1 and variable blower control harness connector
M122 (A) terminal 2.
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> Repair harness or connector.
14.
CHECK VARIABLE BLOWER CONTROL GROUND CIRCUIT
Check continuity between variable blower control harness connector
M122 terminal 1 and ground.
Is the inspection result normal?
YES
>> Replace variable blower control. Refer to
.
NO
>> Repair harness or connector.
Front Blower Motor Component Inspection
INFOID:0000000006164769
COMPONENT INSPECTION
Check continuity between terminals 3 and 5 by supplying 12 volts
and ground to coil side terminals 1 and 2 of the relay.
Front Blower Motor
1 - 2
: Continuity should exist.
AWIIA0179ZZ
1 - Ground
: Continuity should exist.
AWIIA0180ZZ
WJIA1401E
HAC-136
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
BLOWER MOTOR CONTROL SYSTEM
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.
WJIA1508E
MAGNET CLUTCH
HAC-137
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
C
D
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F
G
H
J
K
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M
A
B
HAC
N
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MAGNET CLUTCH
System Description
INFOID:0000000006164770
SYSTEM DESCRIPTION
The front air control controls compressor operation based on ambient and 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 and the ambient sensor.
When intake air temperature is higher than the preset value, the compressor turns ON. The compressor turns
OFF when intake air temperature is lower than the preset value. That preset value is dependent on the ambi-
ent temperature, refer to the following table.
Magnet Clutch Component Function Check
INFOID:0000000006164771
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - MAGNET CLUTCH
1. Turn ignition switch ON.
2. Turn the blower control dial to low speed and press the A/C switch.
3. Press vent mode switch (
).
4. 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-137, "Magnet Clutch Diagnosis Procedure"
.
Magnet Clutch Diagnosis Procedure
INFOID:0000000006164772
Regarding Wiring Diagram information, refer to
HAC-155, "Wiring Diagram - Manual With 2 Control Dial Sys-
DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH
Ambient temperature
°C (°F) Compressor ON intake temperature °C (°F)
Compressor OFF intake temperature
°C (°F)
0 (32)
5.5 (42)
5.0 (41)
10 (50)
5.5 (42)
5.0 (41)
20 (68)
5.5 (42)
5.0 (41)
30 (86)
4.0 (39)
3.5 (38)
40 (104)
3.5 (38)
3.0 (37)
50 (122)
3.5 (38)
3.0 (37)
HAC-138
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
MAGNET CLUTCH
SYMPTOM: Magnet clutch does not engage when A/C switch is ON.
1.
CHECK INTAKE AND AMBIENT SENSOR CIRCUITS
Check intake and ambient sensors. Refer to
HAC-114, "Front Air Control Self-Diagnosis"
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> • Malfunctioning intake sensor. Refer to
HAC-147, "Intake Sensor Diagnosis Procedure"
.
• Malfunctioning ambient sensor. Refer to
HAC-144, "Ambient Sensor Diagnosis Procedure"
.
2.
PERFORM AUTO ACTIVE TEST
PCS-11, "Diagnosis Description"
Does magnet clutch operate?
YES
>> •
WITH CONSULT-III
GO TO 5.
•
WITHOUT CONSULT-III
GO TO 6.
NO
>> Check 10A fuse (No. 42, located in IPDM E/R), and GO TO 3.
3.
CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND COMPRESSOR
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector and 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
>> GO TO 4.
AWIIA0415GB
11 – 1
: Continuity should exist.
11 – ground
: Continuity should not exist.
WJIA0560E
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