Nissan Altima (L32) 2007-2012 Service Manual: Magnet clutch
Component Function Check
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 HAC-102, "Operational Check".
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 HAC-102, "Operational Check".
Does another symptom exist? YES >> Repair as necessary.
NO >> Replace front air control. Refer to VTL-8, "Removal and Installation".
Diagnosis Procedure
DIAGNOSIS PROCEDURE FOR 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 terminal 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 - QR25DE Models" or 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) terminal 48.
If OK, check harness for short to ground.
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair harness or connector.
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 VTL- 8, "Removal and Installation".
• 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) terminal 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
Refer to EC-975, "Diagnosis Procedure" (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 Pressure Sensor"
8.CHECK CAN COMMUNICATION CIRCUITS
Check CAN communication circuits between BCM to ECM and between ECM to IPDM E/R. Refer to LAN-13, "CAN Diagnosis with CONSULT-III".
Is the inspection result normal? YES >> ECM malfunctioning.
NO >> Repair or replace component based on the result of diagnosis.
Blower motor
Description SYSTEM DESCRIPTION Component Parts Fan speed control system components are: • Front air control • A/C LAN system (PBR built-in mode door motor, air mix door motor and intake do ...Power supply and ground circuit for front air control
Description FRONT AIR CONTROL The front air control has a built-in microcomputer which processes information sent from temperature control dial and various switches needed for air conditioner ope ...Other materials:
BCM branch line circuit
Diagnosis Procedure
INSPECTION PROCEDURE
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the BCM for damage, bend and loose
connection (unit side and
connector side).
Is the inspec ...
B2110 PNP/Clutch interlock switch
Description
IPDM E/R confirms the shift position with the following signals.
• Park/neutral position (PNP) switch
• Shift position signal from BCM (CAN)
DTC Logic
DTC DETECTION LOGIC
NOTE:
• If DTC B2110 is displayed with DTC U1000, first perform the trouble diagnosis
for DTC U1000 ...
Moving Object Detection (MOD)
(if so equipped)
CAMERA button
WARNING
Failure to follow the warnings and instructions
for proper use of the Moving
Object Detection (MOD) system could
result in serious injury or death
The MOD system is not a substitute
for proper vehicle operation and is
not designed to prevent contact with
objects surrou ...