Nissan Altima (L32) 2007-2012 Service Manual: 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 operation. The air mix door motor, mode door motor, intake door motor, blower motor and compressor are then controlled.
POTENTIO TEMPERATURE CONTROL (PTC)
The PTC is built into the front air control.
Component Function Check
COMPONENT INSPECTION
SYMPTOM: A/C system does not come on.
INSPECTION FLOW
1. CONFIRM SYMPTOM BY PERFORMING OPERATION CHECK
1. Press A/C switch (indicator should illuminate).
2. Confirm that the compressor clutch engages (sound or visual inspection).
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 MAIN POWER SUPPLY AND GROUND CIRCUIT
Check main power supply and ground circuit. Refer to HAC-135, "Diagnosis Procedure".
Is the inspection result normal? YES >> Replace front air control. Refer to VTL-8, "Removal and Installation".
NO >> Repair as necessary.
Diagnosis Procedure
DIAGNOSIS PROCEDURE FOR A/C SYSTEM
SYMPTOM: A/C system does not come on.
1.CHECK POWER SUPPLY CIRCUIT FOR FRONT AIR CONTROL
1. Disconnect front air control connector M37.
2. Press ignition switch ON.
3. Check voltage between front air control connector M37 terminals 39 and 40, and ground.
Is the inspection result normal? YES >> GO TO 2
NO >> Check the following.
• 10A fuses [Nos. 6, and 3, located in the fuse block (J/B)].
• If fuses are OK, check for open circuit in wiring harness. Repair or replace as necessary.
• If fuses are NG, replace fuse and check wiring harness for short circuit. Repair or replace as necessary.
2.CHECK BODY GROUND CIRCUIT FOR FRONT AIR CONTROL
1. Press ignition switch OFF.
2. Check continuity between front air control connector M37 terminals 17and 37 and ground.
Is the inspection result normal? YES >> • Replace front air control. Refer to VTL-8, "Removal and Installation".
• Inspection End.
NO >> Repair or replace harness.
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. C ...ECU diagnosis
AIR CONDITIONER CONTROL Reference Value VALUES ON THE DIAGNOSIS TOOL TERMINAL LAYOUT PHYSICAL VALUES Wiring Diagram - Air Conditioner Control (Manual) - Coupe Wiring D ...Other materials:
P0444, p0445 evap canister purge
volume control solenoid valve
Description
The EVAP canister purge volume control solenoid valve uses a ON/
OFF duty to control the flow rate of fuel vapor from the EVAP canister.
The EVAP canister purge volume control solenoid valve is
moved by ON/OFF pulses from the ECM. The longer the ON pulse,
the greater the amount of ...
B210C starter control relay
Description
Starter control relay, integrated in IPDM E/R, permits the starter relay
operation when in N or P position and
the steering is locked or unlocked. It is installed in parallel with the starter
relay.
DTC Logic
DTC DETECTION LOGIC
NOTE:
• If DTC B210C is displayed with DTC U10 ...
Replacement operations
Description
This section is prepared for technicians who have attained a high level of
skill and experience in repairing collision-
damaged vehicles and also use modern service tools and equipment. Persons
unfamiliar with body
repair techniques should not attempt to repair collision-damaged ...