Thread: Aircon U/S

The HEVAC unit has a self test.
It will list the faults it finds,if you have RAVE it tells you how to do it.
Will check mine and post.
Andrew

AIR CONDITIONING
DESCRIPTION AND OPERATION 82-21
Diagnostics
The ATC ECU performs a diagnostic check each time the ignition is switched on. To avoid nuisance fault indications
at low light levels, the sunlight sensor is omitted from the diagnostic check. If a fault is detected, the audible warning
sounds three times and the AUTO window on the control panel display flashes for 20 seconds. The ATC ECU then
reverts to normal control but uses a default value or strategy for the detected fault. Faults are identified by performing
a manual diagnostic check of the system.
A manual diagnostic check includes a check of the sunlight sensor, and is initiated by pressing and holding the AUTO
switch and the air distribution switch, then turning the ignition switch from off to on. The audible warning sounds once
and the indications on the control panel display illuminate. FC is shown in the LH temperature window and the results
of the check are shown as a two digit fault code in the RH temperature window. If a fault is detected, the audible
warning sounds three times and the AUTO window on the display flashes on and off for 20 seconds. If more than one
fault is detected, the fault codes cycle in numerical order, at 1 Hz. The audible warning sounds as each fault code is
shown. In low light conditions, to avoid false sunlight sensor fault indications, the sunlight sensor should be illuminated
with a strong light source.
Diagnostic fault codes and fault descriptions
Code Component Fault Default value/strategy
00 - No fault found -11
In-car temperature sensor Open or short circuit 25C (77F)
12 Ambient temperature sensor Open or short circuit 10C (50F)
Cooling fan permanently on
Display shows "- -" if external
air temperature selected
13 Thermistor Open or short circuit 0C (32F)
14 Heater coolant temperature sensor Open or short circuit 70C (158F)
21 Sunlight sensor, left output Open or short circuit No solar heating correction
22 Sunlight sensor, right output Open or short circuit No solar heating correction
31 LH temperature servo motor Open or short circuit
Motor or flap mechanism seized
Servo motor locked in position
32 RH temperature servo motor Open or short circuit
Motor or flap mechanism seized
Servo motor locked in position
33 Distribution servo motor Open or short circuit
Motor or flap mechanism seized
Servo motor locked in position

Well I'll be darned. I will give it a go this evening and see what it comes up with. Thanks Andy

Hi Andy,

I gave it a go and it comes up 00 no fault. I can induce sunlight sensor by putting my hand over the little knob on the dash to give code 21/22. So it is going through the full check. It doesnt seem to check gas levels so that may be it.

Mike

Anyone know what i should be paying for a regas and service of the aircon.

Originally Posted by Disco mike

Anyone know what i should be paying for a regas and service of the aircon.

if you are in the rac ring deerings

I recently help a friend replace his D2's compressor. The system was working but the compressor made a "terminal" sounding noise. After it was regassed the compressor would not engage. Checked the fuses and relay OK. The compressor would engage (and cold air was produced) if the magnetic clutch was "jumped" from the battery.
Did the self test on the Air Temperature Control ECU with no faults displayed. Then swapped his ECU into my vehicle - my compressor would not engage. Put my ECU into his vehicle - his system worked.

Diagnosis - faulty Air Temperature Control ECU
Lesson - the Air Temperature Control ECU self test does not find all faults.

Cheers

I just had the aircon man around to have a look. No Gas and a hole in my condenser . A new condenser is very expensive but managed to track one down from the wreckers . I will now spend Australia day fitting it .

Looks fairly straight forward on the Rave CD is there any hidden problems I need to know about. I have a bullbar so may ned to remove that first.
Mike