Infiniti G35 (V35) Sedan. Manual — part 779
HAC-88
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
BLOWER MOTOR
7.
CHECK CIRCUIT CONTINUITY BETWEEN BLOWER MOTOR AND UNIFIED METER AND A/C AMP.
1.
Disconnect unified meter and A/C amp. connector.
2.
Check continuity between blower motor harness connector M109 terminal 2 and unified meter and A/C
amp. harness connector M66 terminal 38.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair harness or connector.
8.
CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL
1.
Reconnect blower motor connector and unified meter and A/C amp. connector.
2.
Turn ignition switch ON.
3.
Set MODE switch to VENT position.
4.
Change fan speed from Lo to Hi, and check duty ratios between blower motor harness connector M109
terminal 2 and ground by using an oscilloscope. Normal terminal 2 drive signal duty ratios are shown in
the table below.
Is the inspection result normal?
YES
>> Replace blower motor after confirming the fan air flow does not change.
NO
>> Replace unified meter and A/C amp.
9.
CHECK POWER VOLTAGE OF BLOWER FAN MOTOR
1.
Turn ignition switch OFF.
2.
Remove blower fan motor relay. Refer to
PG-93, "Fuse, Connector and Terminal Arrangement"
3.
Turn ignition switch ON.
4.
Check the voltage between blower fan motor relay fuse block terminals 1, 3 and body ground. Refer to
for relay terminal assignment.
Is the inspection result normal?
(+)
(
−
)
Continuity
blower motor
Unified meter and A/C amp.
Connector
Terminal
Connector
Terminal
M109
2
M66
38
Continuity should exist
JSIIA0068GB
(+)
(
−
)
Voltage
Blower fan motor relay
—
Fuse block terminal
1
Ground
Battery voltage
3
BLOWER MOTOR
HAC-89
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
YES
>> GO TO 11.
NO
>> GO TO 10.
10.
CHECK IGNITION SWITCH
Check ignition switch.
Is the inspection result normal?
YES
>> Repair harness or connector.
NG
>> Replace ignition switch.
11.
CHECK BLOWER FAN MOTOR RELAY
1.
Turn ignition switch OFF.
2.
Install blower fan motor relay. Refer to
PG-93, "Fuse, Connector and Terminal Arrangement"
3.
Check operation sound of the blower fan motor relay after switching ignition switch ON.
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> Replace blower fan motor relay.
12.
CHECK FUSE
Check fuse 15A [Nos 21 and 22, located in the fuse block (J/B). Refer to
PG-93, "Fuse, Connector and Termi-
Is the inspection result normal?
YES
>> Repair harness or connector.
NG
>> Replace fuse.
WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL
SYSTEM : Component Inspection
INFOID:0000000000959947
Confirm smooth rotation of the blower motor (1).
JSIIA0044ZZ
HAC-90
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
MAGNET CLUTCH
MAGNET CLUTCH
Description
INFOID:0000000000959948
Magnet clutch drives a compressor, by a signal of IPDM/ER.
Component Function Check
INFOID:0000000000959949
1.
CONFIRM SYMPTOM BY PERFORMING THE FOLLOWING OPERATIONAL CHECK
1.
Press AUTO switch and A/C switch.
2.
Display should indicate AUTO. Confirm that the magnet clutch engages (sound or visual inspection). (Dis-
charge air and blower speed will depend on ambient, in-vehicle and set temperatures.)
Does the magnet clutch operate?
YES
>> END.
NO
>> Go to Diagnosis Procedure. Refer to
.
Diagnosis Procedure
INFOID:0000000000959950
1.
PERFORM SELF-DIAGNOSIS STEP-2
Perform self-diagnosis STEP-2. Refer to
HAC-44, "WITHOUT LEFT AND RIGHT VENTILATION TEMPERA-
TURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"
(Without left and right ventilation tempera-
ture separately control system) or
HAC-50, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE
SEPARATELY CONTROL SYSTEM : Diagnosis Description"
(With left and right ventilation temperature sepa-
rately control system), see No. 1 to 2.
Is there any malfunction displayed?
YES
>> Go to appropriate malfunctioning sensor circuit. Refer to
HAC-44, "WITHOUT LEFT AND RIGHT
VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"
(Without left and right ventilation temperature separately control system) or
AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis
Description"
(With left and right ventilation temperature separately control system), see to No. 11.
NO
>> GO TO 2.
2.
PERFORM SELF-DIAGNOSIS STEP-4
Perform self-diagnosis STEP-4. Refer to
HAC-44, "WITHOUT LEFT AND RIGHT VENTILATION TEMPERA-
TURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"
(Without left and right ventilation tempera-
ture separately control system) or
HAC-50, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE
SEPARATELY CONTROL SYSTEM : Diagnosis Description"
(With left and right ventilation temperature sepa-
rately control system), see No. 1 to 5.
Is it operated normally?
YES
>> END.
NO
>> GO TO 3.
3.
PERFORM AUTO ACTIVE TEST
PCS-10, "Diagnosis Description"
.
Does the magnet clutch operate?
YES
>> •
WITH CONSULT-III: GO TO 6.
•
WITHOUT CONSULT-III: GO TO 7.
NO
>> Check 10A fuse (No. 49, located in IPDM E/R), and GO TO 4.
4.
CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND COMPRESSOR
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R connector and compressor connector.
3.
Check continuity between IPDM E/R harness connector E7 terminal 48 and compressor harness connec-
tor F44 terminal 1.
MAGNET CLUTCH
HAC-91
< COMPONENT DIAGNOSIS >
[AUTOMATIC 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 5.
NO
>> Repair harness or connector.
5.
CHECK MAGNET CLUTCH CIRCUIT
Check for operation sound when applying battery voltage direct current to terminal.
Is the inspection result normal?
YES
>> 1.
Replace IPDM E/R.
2.
Refer to self-diagnosis procedure
HAC-44, "WITHOUT LEFT AND RIGHT VENTILATION
TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"
(Without left
and right ventilation temperature separately control system) or
RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis
Description"
(With left and right ventilation temperature separately control system) and per-
form self-diagnosis STEP-4. Confirm that magnet clutch operation normal.
NO
>> 1.
Replace compressor.
2.
Refer to self-diagnosis procedure
HAC-44, "WITHOUT LEFT AND RIGHT VENTILATION
TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"
(Without left
and right ventilation temperature separately control system) or
RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis
Description"
(With left and right ventilation temperature separately control system) and per-
form self-diagnosis STEP-4. Confirm that magnet clutch operation normal.
6.
CHECK BCM INPUT (COMPRESSOR ON) SIGNAL
Check compressor ON/OFF signal. Refer to
HAC-49, "WITHOUT LEFT AND RIGHT VENTILATION TEM-
PERATURE SEPARATELY CONTROL SYSTEM : CONSULT-III Function"
.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 7.
7.
CHECK REFRIGERANT PRESSURE SENSOR
WITH CONSULT-III
1.
Start the engine.
2.
Check voltage of refrigerant pressure sensor. Refer to
.
WITHOUT CONSULT-III
1.
Start the engine.
2.
Check voltage between ECM harness connector M107 terminal 105 and ground.
Is the inspection result normal?
YES
>> •
WITH CONSULT-III: GO TO 8.
•
WITHOUT CONSULT-III: Repair harness or connector.
NO
>> Refer to
.
(+)
(
−
)
Continuity
IPDM E/R
Compressor
Connector
Terminal
Connector
Terminal
E7
48
F44
1
Continuity should exist
A/C SW ON
: AIR COND SIG ON
A/C SW OFF
: AIR COND SIG OFF
(+)
(
−
)
Condition
Voltage
ECM
—
connector
Terminal
M107
105
Ground
A/C switch: ON
(Blower motor operates.)
Approx. 1.0 - 4.0 V
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