Nissan Skyline R32 air conditioner prior to trouble diagnosis
 
This fully automatic air conditioner has a self-diagnostic function for checking its major components. Using this self-diagnostic function, it is possible to check whether the signal issued from each sensor is within the effective range of the respective sensor characteristics, and whether each actuator can respond correctly to a control signal issued by force under a predetermined condition. It is also possible to check the function of the display section, mode signal, and each sensor. This means that, using the self-diagnostic function, most components of this fully automatic air conditioner can be checked. After identifying a faulty section, however, each sensor or actuator must be examined using conventional method.
If an error in the electrical system is determined as the cause of a fault, for example, it is also necessary to check fuses, connectors, and terminals, etc. in addition to self-diagnosis.
 
Fuses that need inspection
 
Nissan Skyline GT-R32 Air conditioner prior to trouble diagnosis
 

No.

Capacity

Power supply system

Major load (Air conditioner)

4

15A

ACC

Blower fan

motor, auto

amplifier

5

10

10 A

Magnet clutch

20

IGN

Air conditioner

relay, intake

door actuator, HI

relay, auto

amplifier

23

BAT

Auto amplifier

 

 
The basic troubleshooting flow diagram is shown below:
 
Nissan Skyline GT-R32 Air conditioner prior to trouble diagnosis
 
(*) NOTE:
Self-diagnostic function is unable to check such phenomena that cannot be reproduced.