right chaps my air con wont work, ive upgraded to series 2 with ecu and pod and pipes, and compressor,

had it vac/ pressurised and filled system etc 134a

compressor wont click in, fuses ok/swapped relay etc

system pressure is good tried linking pressure switch out still wont click in so pressure must be good

put direct feed to compressor hey presto works a treat and cool air

so its control side

any suggestion, faulty ecu or pod or have i missed sumat??

rich

Prior to changing the display to series ll what was the ambient temp ( outside ) showing, by any chance was it a very high minus figure? if so points to outside temp sensor fault behind the bumper not plugged in.

 

Jeff TT

Hi jeff it's plugged in but can't remember what reading was it was 2 yr ago lol

 

 

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I can't remember how, but if you press a certain 2 buttons in a certain way it puts the air con pod in to diagnosis mode in which you can scroll through the sensors and it tells you what they are reading. This includes the external sensor, I used to check that one all the time when I had my series 2 Z.

Sorry I can't remember how, sure someone will know...

Ignition ON, push "AUTO" and "OFF" buttons for 5 seconds+ puts the system into self-diagnostics.

 

The self-diagnostics are described in the FSM section HA pages 118 and on:

 

http://www.300zx.co.uk/tech/manual/manual/ha/118.gif

struggling to decifer codes on this diag mode

after hokding both buttons in i get 22

then press autp i get it counting from 1 to 49

press auto i get 20

press auto i get 50

 

assuming thhis is hi low setting

 

help ??

rich

press auto

then back to 22 again

Did you take a look at pages HA-119 -> HA-123 to follow self-diagnostics steps?

Yeah but it didn't make sense it's supposed to say 00 on first part which mine didn't

So not sure what's wrong

 

 

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Yeah but it didn't make sense it's supposed to say 00 on first part which mine didn't

So not sure what's wrong

any other suggestions?

]

anybody with series 2 aircon can you put in diagnostic mode and tell me what values it should read ??

rich

Just been out and mine read 15 with a dash under it and under that the demist symbol, pressing the fan buttons seem to go through various numbers and settings and pressing the auto button changes it all again.

I havent read the diag mode yet so dont know what it all means yet lol

Ok just read the diag mode and went out again and here are my numbers

15 press auto

49 press auto

0 press auto

50 press auto

 

I found pressing the fan buttons did something but i havent researched the meaning f that yet

Ok just read the diag mode and went out again and here are my numbers

15 press auto

49 press auto

0 press auto

50 press auto

 

I found pressing the fan buttons did something but i havent researched the meaning f that yet

 

Cheers I can't fathom why mines different

What colour is the sticker on your aircon ecu, green or blue?

Rich, I get the same readings as groover's results above (on entry to diags - 15 with a dash under it and demist symbol). This

is without the engine started (should be running as per FSM diag instructions). I can't start the engine at the moment as I'm

servicing the car, but have you got the engine running?

Edited May 22, 201411 yr by AndrewG

Rich, I get the same readings as groover's results above (on entry to diags - 15 with a dash under it and demist symbol). This

is without the engine started (as per FSM diag instructions). I can't start the engine at the moment as I'm servicing the car, but

have you got the engine running?

 

No bud done it without engine running

It's weird

Ps I take it with the series 2 there is no ambient temp reading

For outside

Yes no ambient temp on a series 2, i also did my check without engine running but ignition on.

My apologies, my post above implies that the engine should be off, FSM states that engine should be running, have another go...

Yes no ambient temp on a series 2, i also did my check without engine running but ignition on.

 

All I need now I someone who can decifer using the diagnostic mode so I can work out whats stopping the air con clutch engaging

:(

Tried it both ways

Running I get

18 1 dash demist symbol

49 2 dash fan and demist symbol

20 with 3 dashes

50 with 2 dashes spaced demist symbol

So i take it you cant hear a click for it to engage?

No bud but if I put live power direct up the compressor it works fine

And the system pressure is correct

I tried it with the engine on today and on the second press of the auto button i hear the click of the compressor.

 

Have you checked the 3 aircon fuses 2 in the footwell and 1 in the engine bay and the relay?

I tried it with the engine on today and on the second press of the auto button i hear the click of the compressor.

 

Have you checked the 3 aircon fuses 2 in the footwell and 1 in the engine bay and the relay?

 

I've checked relay and fuse under bonnet but not inside car I'll check Tomoz and let ya know

Rich

checked footwell only 1 listed 7.5 amp

rich