Nissan Cube. Manual - part 557
HAC-66
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
A/C AUTO AMP.
A/C AUTO AMP.
Description
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A/C AUTO AMP. (AIR CONDITIONER AUTOMATIC AMPLIFIER)
• The A/C auto amp. has a built-in microcomputer which processes
information sent from various sensors needed for air conditioner
operation.
• The air mix door motor, mode door motor, intake door motor,
blower motor and the compressor are then controlled.
• The A/C auto amp. is unitized with control mechanism. Signal from
various switches are directly entered into A/C auto amp.
• Self-diagnosis functions are also built into A/C auto amp. to pro-
vide quick check of malfunctions in the auto air conditioner system.
Component Function Check
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1.
CHECK OPERATION
1.
Confirm that “AUTO” is indicated on the display by operating the AUTO switch.
2.
Operate the temperature control switch. Check that the fan speed or discharge air changes (the discharge
air temperature or fan speed varies depending on the ambient temperature, in-vehicle temperature, and
set temperature).
Does it operate normally?
YES
>> INSPECTION END
NO
>> Perform the diagnosis for the A/C auto amp. Refer to
Diagnosis Procedure
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1.
CHECK A/C AUTO AMP. POWER SUPPLY CIRCUIT AND GROUND CIRCUIT
Check A/C auto amp. power supply circuit and ground circuit. Refer to
HAC-64, "A/C AUTO AMP. : Diagnosis
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace parts depending on the inspection results.
JPIIA1743ZZ