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air con problem

Posted: Sat Sep 07, 2019 2:36 pm
by haRRibo
Hello

Run on 5gen Prelude 2,2 vtec turbo and have a problem with AC.

S300-5143

My AC compressors clutch is still on, there is ground signal from ECU sended to the compresor clutch relay after ignition is turned on.
Doesn´t matter if the AC is on or off.

I have an adaptor harness. All pins on the harness are correct for the A/C.

On OBD1 the pin for the A/C relay is A15 and the pin for the A/C switch ia B5
On the OBD2a the A/C relay is A17 and the pin for the A/C switch ia C5

I did a double check of all cables and are OK.

With original ECU it is OK.

In SManager , in online sensors is at ACCL line still blue dot. It means something???

Thank you for help

Hopoefully you will understand my bad - Europe english

Re: air con problem

Posted: Tue Sep 10, 2019 10:43 am
by Spunkster
Have you tried this with a different OBD1 ECU?

Re: air con problem

Posted: Tue Sep 10, 2019 11:01 am
by haRRibo
No I haven´t.

Do you think use this hondata with different ECU?

It can be hardware problem?

Re: air con problem

Posted: Tue Sep 10, 2019 11:09 am
by Spunkster
It could be a problem with the ECU.

Re: air con problem

Posted: Fri Sep 13, 2019 6:57 am
by haRRibo
I took S300 out of ECU mother board and it is OK.

Also I took another P28 ECU without S300 and it is OK , there is not a ground signal from ECU sended to the compresor clutch relay after ignition is turned on.

So the problem can be be the S300???

Re: air con problem

Posted: Fri Sep 13, 2019 9:38 am
by Spunkster
Post your calibration as well as a datalog showing the issue.

Re: air con problem

Posted: Sun Sep 15, 2019 11:45 am
by haRRibo
my calibration is here

Re: air con problem

Posted: Sun Oct 06, 2019 3:07 am
by haRRibo
I ordered new S300 V3 and let you know if it help.