Nissan Altima L32. Instruction — part 839
HAC-130
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
BLOWER MOTOR
NO
>> Repair harness or connector.
9.
CHECK FRONT BLOWER MOTOR RELAY GROUND
1. Press ignition switch OFF.
2. Disconnect fuse block (J/B) harness connector M5.
3. Check continuity between fuse block (J/B) harness connector
M5 terminal 7M and ground.
Is the inspection result normal?
YES
>> Replace front blower motor relay.
NO
>> Repair harness or connector.
Terminal
Continuity
(+)
(-)
Connector - Terminal
Connector - Terminal
Yes
M5 - 7M
Ground
AWIIA0619ZZ
MAGNET CLUTCH
HAC-131
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
MAGNET CLUTCH
Component Function Check
INFOID:0000000004498278
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATION CHECK - MAGNET CLUTCH
1. Press ignition switch ON.
2. Press vent switch (
).
3. Press A/C 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).
Can a symptom be duplicated?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
PERFORM COMPLETE OPERATIONAL CHECK
Perform a complete operational check and check for any symptoms. Refer to
.
Is the inspection result normal?
YES
>> Refer to
HAC-155, "Symptom Matrix Chart"
NO
>> System OK.
3.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.
CHECK MAGNET CLUTCH MECHANISM
Check for magnet clutch operation.
Does the magnet clutch engage?
YES
>> GO TO 5
NO
>> Check magnet clutch circuit. Refer to
HAC-131, "Diagnosis Procedure"
.
5.
CHECK AIR MIX DOOR MOTOR PBR CIRCUITS
Perform diagnostic procedure for the air mix door motor circuit. Refer to
HAC-122, "Diagnosis Procedure"
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair as necessary.
6.
RECHECK FOR SYMPTOMS
Perform a complete operational check and check for any symptoms. Refer to
.
Does another symptom exist?
YES
>> Repair as necessary.
NO
>> Replace front air control. Refer to
VTL-8, "Removal and Installation"
.
Diagnosis Procedure
INFOID:0000000004498279
DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH
HAC-132
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
MAGNET CLUTCH
SYMPTOM: Magnet clutch does not engage when A/C switch is ON.
1.
CHECK POWER SUPPLY FOR COMPRESSOR
1. Disconnect A/C compressor connector.
2. Start engine and press A/C switch.
3. Check voltage between compressor harness connector F3 ter-
minal 1 and ground.
Is the inspection result normal?
YES
>>
Check magnet clutch coil.
1. If NG, replace magnet clutch. Refer to
HA-35, "Removal and Installation for Compressor -
HA-36, "Removal and Installation for Compressor - VQ35DE Models"
2. If OK, check compressor mounting points for looseness or corrosion and repair as necessary.
NO
>> GO TO 2.
2.
CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY IN IPDM E/R AND COMPRESSOR
1. Disconnect IPDM E/R connector F10.
2. Check continuity between A/C compressor harness connector
F3 (A) terminal 1 and IPDM E/R harness connector F10 (B) ter-
minal 48.
If OK, check harness for short to ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
AWIIA0046GB
Terminal
Voltage (V)
(Approx.)
(+)
(-)
Connector - Terminal
Body ground
12V
F3-1
AWIIA0621ZZ
Terminals
Continuity
Connector - Terminal
Connector - Terminal
Yes
F3 - 1
F10 - 48
AWIIA0622ZZ
MAGNET CLUTCH
HAC-133
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
3.
CHECK FUSE IN IPDM E/R
Check 10A fuse (No. 41 located in the IPDM E/R).
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace fuse and check IPDM E/R for short circuit. Replace if necessary.
4.
CHECK COMPRESSOR ON SIGNAL
Check voltage between front air control connector M37 terminal 5
and ground, with A/C compressor ON and with A/C compressor
OFF.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> • When compressor is ON and voltage is not approx. 0V, Replace front air control. Refer to
.
• When compressor is OFF and voltage is not approx. 5V, BCM is malfunctioning.
5.
CHECK CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL
1. Disconnect BCM connector M18 and front air control connector
M37.
2. Check continuity between BCM harness connector M18 (A) ter-
minal 33 and front air control connector M37 (B) terminal 5.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
6.
CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL
Check voltage between ECM harness connector F13 terminal 39
and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> 1. Repair harness or connector.
2. Confirm that magnet clutch operation is normal.
7.
CHECK REFRIGERANT PRESSURE SENSOR
(QR25DE) or
EC-1503, "Diagnosis Procedure"
.(VQ35DE)
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace refrigerant pressure sensor. Refer to
HA-44, "Removal and Installation for Refrigerant
Terminal
Voltage (V)
(Approx.)
(+)
(-)
Connector - Terminal
Body ground
Compressor ON: 0V
Compressor OFF: 5V
M37 - 5
AWIIA0623ZZ
Terminals
Continuity
Connector - Terminal
Connector - Terminal
Yes
M18 - 33
M37 - 5
AWIIA0624ZZ
Terminal
Voltage (V)
(Approx.)
(+)
(-)
Connector- Terminal
Body ground
12V
F13-39
AWIIA0625ZZ
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