Nissan GT-R (R35) · Service Manual
VENTILATION, HEATER & AIR CONDITIONER
VENTILATION, HEATER & AIR CONDITIONER › HEATER & AIR CONDITIONING CONTROL SYSTEM › COMPONENT DIAGNOSIS
MAGNET CLUTCH
AUTOMATIC AIR CONDITIONER
Description
Component Function Check
Diagnosis Procedure
Description
The magnetic clutch is the device that drives the compressor with the signal from IPDM E/R.
Component Function Check
1.CHECK OPERATION
Turn the fan control dial ON.
Press the A/C switch.
Check that the indicator of the A/C switch turns ON. Check visually and by sound that the compressor operates.
Press the A/C switch again.
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
>>
Go to diagnosis procedure. Refer to
Diagnosis Procedure
.
Diagnosis Procedure
1.CHECK CHARGED REFRIGERANT
Connect the recovery/recycling recharging equipment to the vehicle and perform the pressure inspection with the gauge.
Is there refrigerant?
YES
>>
GO TO 2
.
NO
>>
Check for refrigerant leakages detecting fluorescent leak detector. Refer to
Inspection
.
2.CHECK MAGNET CLUTCH OPERATION
Perform auto active test of IPDM E/R. Refer to
Diagnosis Description
.
Does it operate normally?
YES
>>
GO TO 6
.
NO
>>
GO TO 3
.
3.CHECK MAGNET CLUTCH
Turn the ignition switch OFF.
Disconnect the magnetic clutch connector.
Directly apply the battery voltage to the magnetic clutch. Check for operation visually and by sound.
Does it operate normally?
YES
>>
GO TO 4
.
NO
>>
Replace the compressor.
4.CHECK MAGNET CLUTCH CIRCUIT CONTINUITY
Turn the ignition switch OFF.
Disconnect IPDM E/R connector.
Check continuity between compressor (magnetic clutch) harness connector and IPDM E/R harness connector.
IPDM E/R
Compressor (magnet clutch)
Continuity
Connector
Terminal
Connector
Terminal
E7
48
F35
1
Existed
Is the inspection result normal?
YES
>>
GO TO 5
.
NO
>>
Repair the harnesses and connectors.
5.CHECK FUSE
Check 10A fuse (No. 49, located in the IPDM E/R).
NOTE：
Refer to
Fuse, Connector and Terminal Arrangement
.
Is the inspection result normal?
YES
>>
Replace IPDM E/R.
NO
>>
Replace the fuse after repairing the applicable circuit.
6.CHECK SELF-DIAGNOSIS RESULT CHECK
With CONSULT-III
Perform the “SELF-DIAGNOSIS”.
Check if any DTC is detected in the self-diagnostic results.
NOTE：
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
DTC Logic
or
DTC Logic
.
Is any DTC displayed?
YES
>>
Perform the diagnosis that is applicable to the sensor and actuator. Refer to
DTC Index
.
NO
>>
GO TO 7
.
7.CHECK A/C AUTO AMP. OUTPUT SIGNAL
With CONSULT-III
Perform the “DATA MONITOR” of HVAC. Refer to
Reference Value
.
Check A/C switch signal and blower fan motor switch signal.
Monitor item
Condition
Status
AIR COND SIG
A/C switch: OFF
Off
A/C switch: ON
On
HEATER FAN SW
Fan control dial: OFF
Off
Fan control dial: ON
On
Is the inspection result normal?
YES
>>
GO TO 8
.
NO
>>
Replace A/C auto amp.
8.CHECK REFRIGERANT PRESSURE SENSOR
Check the refrigerant pressure sensor. Refer to
Diagnosis Procedure (GT-R certified NISSAN dealer)
.
Is the inspection result normal?
YES
>>
INSPECTION END
NO
>>
Repair or replace the malfunctioning parts.
1.CHECK OPERATION
With CONSULT-III