Nissan Murano. Instruction — part 825
HAC-74
< DTC/CIRCUIT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
MAGNET CLUTCH
MAGNET CLUTCH
Description
INFOID:0000000009722092
The magnet clutch drives the compressor, by an IPDM E/R signal.
Component Function Check
INFOID:0000000009722093
1.
FUNCTION INSPECTION
1.
Press AUTO switch.
2.
“AUTO” is indicated on the display.
3.
Press the A/C switch.
4.
Check that the indicator of the A/C switch turns on. Check visually and by sound that the compressor is
operating (the discharge air temperature or fan speed varies depending on the ambient temperature, in-
vehicle temperature, and temperature setting).
5.
Press the A/C switch again.
6.
Check that the indicator of the A/C switch turns OFF. Check visually and by sound that the compressor
stops.
Does it operate normally?
YES
>> INSPECTION END
NO
>> Perform trouble diagnosis for the compressor. Refer to
Diagnosis Procedure
INFOID:0000000009722094
1.
INSPECTION IN AUTO ACTIVE TEST MODE
Perform “AUTO ACTIVE TEST”. Refer to
PCS-10, "Diagnosis Description"
.
Does it operate normally?
YES
>> GO TO 6.
NO
>> GO TO 2.
2.
CHECK MAGNET CLUTCH POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect compressor connector.
3.
Perform auto active test of IPDM E/R. Refer to
PCS-10, "Diagnosis Description"
.
4.
When auto active test operation sequence is compressor (magnet clutch) operation, check voltage
between compressor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 3.
3.
CHECK FUSE
Check 10 A fuse (No. 49, located in IPDM E/R).
NOTE:
Refer to
PG-93, "Fuse, Connector and Terminal Arrangement"
.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
4.
CHECK MAGNET CLUTCH POWER SUPPLY CIRCUIT FOR OPEN
1.
Disconnect IPDM E/R connector.
2.
Check continuity between IPDM E/R harness connector and compressor harness connector.
+
−
Voltage
Compressor
Connector
Terminal
F18
1
Ground
0 V
⇔
Battery voltage
MAGNET CLUTCH
HAC-75
< DTC/CIRCUIT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
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HAC
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Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-37, "Removal and Installation"
.
NO
>> Repair harness or connector.
5.
CHECK MAGNET CLUTCH GROUND CIRCUIT FOR OPEN
Check continuity between compressor harness connector and ground.
Is the inspection result normal?
YES
>> Replace magnet clutch. Refer to
HA-38, "MAGNET CLUTCH : Removal and Installation"
.
NO
>> Repair harness or connector.
6.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT
1.
Using CONSULT, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
2.
Check if any DTC No. is displayed in the self-diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
.
Is any DTC No. displayed?
YES
>> Perform the diagnosis that is applicable to the sensor and actuator. Refer to
.
NO
>> GO TO 7.
7.
CHECK A/C AUTO AMP. INPUT SIGNAL
Using CONSULT, check “On/Off” of “COMP REQ SIG” and “FAN REQ SIG” in “DATA MONITOR” of HVAC.
Refer to
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace A/C auto amp.
8.
CHECK REFRIGERANT PRESSURE SENSOR
Check refrigerant pressure sensor. Refer to
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace malfunctioning parts.
IPDM E/R
Compressor
Continuity
Connector
Terminal
Connector
Terminal
F12
48
F18
1
Existed
Compressor
—
Continuity
Connector
Terminal
F18
2
Ground
Existed
A/C SWITCH ON
: COMP REQ SIG On
A/C SWITCH OFF
: COMP REQ SIG Off
FAN CONTROL DIAL ON
: FAN REQ SIG On
FAN CONTROL DIAL OFF
: FAN REQ SIG Off
HAC-76
< DTC/CIRCUIT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
A/C CONTROL SIGNAL CIRCUIT
A/C CONTROL SIGNAL CIRCUIT
Diagnosis Procedure
INFOID:0000000009722095
1.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT
1.
Using CONSULT, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
2.
Check if any DTC No. is displayed in the self-diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
.
Is any DTC No. displayed?
YES
>> Perform the diagnosis that is applicable to the sensor and actuator. Refer to
.
NO
>> GO TO 2.
2.
CHECK TX (A/C CONTROL
→
A/C AUTO AMP.) CIRCUIT CONTINUITY
1.
Disconnect the A/C control and the A/C auto amp. connector.
2.
Check continuity between A/C control harness connector and A/C auto amp. harness connector.
3.
Check continuity between A/C control harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK RX (A/C AUTO AMP.
→
A/C CONTROL) CIRCUIT CONTINUITY
1.
Disconnect the A/C control and the A/C auto amp. connector.
2.
Check continuity between A/C control harness connector and A/C auto amp. harness connector.
3.
Check continuity between A/C control harness connector and ground.
Is the inspection result normal?
YES
>> Perform trouble diagnosis for the A/C control. Refer to
HAC-78, "A/C CONTROL : Diagnosis Pro-
NO
>> Repair harness or connector.
A/C control
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M95
4
M50
7
Existed
A/C control
—
Continuity
Connector
Terminal
M95
4
Ground
Not existed
A/C control
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M95
3
M50
6
Existed
A/C control
—
Continuity
Connector
Terminal
M95
3
Ground
Not existed
POWER SUPPLY AND GROUND CIRCUIT
HAC-77
< DTC/CIRCUIT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
C
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F
G
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HAC
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POWER SUPPLY AND GROUND CIRCUIT
A/C AUTO AMP.
A/C AUTO AMP. : Description
INFOID:0000000009722096
COMPONENT DESCRIPTION
A/C Auto Amp. (Air Conditioner Automatic Amplifier)
The A/C auto amp. (1) has a built-in microcomputer that processes
information sent from various sensors needed for air conditioner
operation. The air mix door motor(s), the mode door motor, the
intake door motor, the upper ventilator door motor, the blower motor
and the compressor are then controlled.
When the various switches and temperature control switch are oper-
ated, data is input to the A/C auto amp. from the A/C control.
Power Supply and Ground Circuit for A/C Auto Amp.
A/C AUTO AMP. : Component Function Check
INFOID:0000000009722097
1.
CHECK OPERATION
1.
Press the AUTO switch, and then check that “AUTO” is shown on the display.
2.
Operate the temperature control switch (driver side). Check that the fan speed or outlet changes. (The
discharge air temperature or fan speed varies depending on the ambient temperature, in-vehicle tempera-
ture, and temperature setting.)
Does it operate normally?
YES
>> INSPECTION END
NO
>> Perform trouble diagnosis for the A/C system. Refer to
HAC-77, "A/C AUTO AMP. : Diagnosis
.
A/C AUTO AMP. : Diagnosis Procedure
INFOID:0000000009722098
1.
CHECK A/C AUTO AMP. POWER SUPPLY CIRCUIT
1.
Disconnect the A/C auto amp. connector.
2.
Check voltage between A/C auto amp. harness connector and ground.
JPIIA0609ZZ
JPIIA0617GB
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