2008 Infiniti QX56 - Heater & Air Conditioning Control System (Section HAC) (123 pages)
Download Heater & Air Conditioning Control System (Section HAC)
Manual Description
HEATER & AIR CONDITIONING CONTROL SYSTEM, how to Perform Trouble Diagnosis For Quick And, mode Door Motor (Front) Component Function, mode Door Motor (Front) Diagnosis Procedure26.
Switches And Their Control Function (Front) 17, switches And Their Control Function (Rear) 18, a/C and AV Switch Assembly Self-Diagnosis 22, a/C System Self-Diagnosis Code Chart 23.
Air Mix Door Motor Component Function Check31, air Mix Door Motor (Driver) Diagnosis Procedure32, air Mix Door Motor (Passenger) Diagnosis Procedure35, intake Door Motor Component Function Check41.
Defroster Door Motor Component Function Check, front Blower Motor Component Function Check50, rear Blower Motor Component Function Check56, rear Air Control (Front) Diagnosis Procedure #157.
Rear Air Control (Rear) Diagnosis Procedure #258, rear Air Control Component Function Check61, air Mix Door Motor (Rear) Diagnosis Procedure62, mode Door Motor (Rear) Diagnosis Procedure66.
Magnet Clutch Component Function Check 71, trouble Diagnoses Abnormal Pressure 114, mEMORY FUNCTION DOES NOT OPERATE 121, a/C Auto Amp Power and Ground Diagnosis Procedure 89.
(SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" 122, how to Perform Trouble Diagnosis For Quick And Accurate Repair, verify the symptom with operational check, >> If any diagnostic trouble codes set.
>> Confirm the repair by performing operational check, the purpose of the operational check is to confirm that system operates properly, : Engine running and normal operating temperature, set the temperature 32°C (90°F).
Confirm that the set temperature remains previous temperature, if OK, continue with next check, press the blower speed control switch (+) once, blower should operate on low speed, should have one bar lit (on display).
Press MODE switch four times DEF, each position indicator should change shape (on display), confirm that discharge air comes out according to the air distribution table, mode door position is checked next step.
Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position, fresh when the DEF D/F selected, confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position fresh, rotate temperature control dial (drive or passenger) counterclockwise until 18°C (60°F) displayed.
Check for cold air at appropriate discharge air outlets, if NG, listen for sound of air mix door motor operation, press A/C switch when AUTO switch is ON, manual mode, a/C switch indicator will turn ON.
Confirm that the compressor clutch engages (sound visual inspection), if current mode setting is DEF or D/F, compressor clutch will already be engaged and cannot be turned off, if ambient temperature is warm, and selected temperature is cool, confirm that compressor clutch, if all operational checks are OK (symptom cannot be duplicated), go to malfunction Simulation Tests in HAC3, "How to Perform Trouble Diagnosis For Quick And Accurate Repair" and perform tests as outlined simu- J.
Comes out relative to the icon on each switch according, switch and according to the air distribution table, air mix door position is checked next step.
Manual Description
HEATER & AIR CONDITIONING CONTROL SYSTEM, how to Perform Trouble Diagnosis For Quick And, mode Door Motor (Front) Component Function, mode Door Motor (Front) Diagnosis Procedure26.
Switches And Their Control Function (Front) 17, switches And Their Control Function (Rear) 18, a/C and AV Switch Assembly Self-Diagnosis 22, a/C System Self-Diagnosis Code Chart 23.
Air Mix Door Motor Component Function Check31, air Mix Door Motor (Driver) Diagnosis Procedure32, air Mix Door Motor (Passenger) Diagnosis Procedure35, intake Door Motor Component Function Check41.
Defroster Door Motor Component Function Check, front Blower Motor Component Function Check50, rear Blower Motor Component Function Check56, rear Air Control (Front) Diagnosis Procedure #157.
Rear Air Control (Rear) Diagnosis Procedure #258, rear Air Control Component Function Check61, air Mix Door Motor (Rear) Diagnosis Procedure62, mode Door Motor (Rear) Diagnosis Procedure66.
Magnet Clutch Component Function Check 71, trouble Diagnoses Abnormal Pressure 114, mEMORY FUNCTION DOES NOT OPERATE 121, a/C Auto Amp Power and Ground Diagnosis Procedure 89.
(SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" 122, how to Perform Trouble Diagnosis For Quick And Accurate Repair, verify the symptom with operational check, >> If any diagnostic trouble codes set.
>> Confirm the repair by performing operational check, the purpose of the operational check is to confirm that system operates properly, : Engine running and normal operating temperature, set the temperature 32°C (90°F).
Confirm that the set temperature remains previous temperature, if OK, continue with next check, press the blower speed control switch (+) once, blower should operate on low speed, should have one bar lit (on display).
Press MODE switch four times DEF, each position indicator should change shape (on display), confirm that discharge air comes out according to the air distribution table, mode door position is checked next step.
Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position, fresh when the DEF D/F selected, confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position fresh, rotate temperature control dial (drive or passenger) counterclockwise until 18°C (60°F) displayed.
Check for cold air at appropriate discharge air outlets, if NG, listen for sound of air mix door motor operation, press A/C switch when AUTO switch is ON, manual mode, a/C switch indicator will turn ON.
Confirm that the compressor clutch engages (sound visual inspection), if current mode setting is DEF or D/F, compressor clutch will already be engaged and cannot be turned off, if ambient temperature is warm, and selected temperature is cool, confirm that compressor clutch, if all operational checks are OK (symptom cannot be duplicated), go to malfunction Simulation Tests in HAC3, "How to Perform Trouble Diagnosis For Quick And Accurate Repair" and perform tests as outlined simu- J.
Comes out relative to the icon on each switch according, switch and according to the air distribution table, air mix door position is checked next step.
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