Volvo AWD 400 Forum

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440 Turbo Fault Codes 400 1993

I have seen the fault codes listed for the Fenix system on the 440's, but never anything mentioned about the Turbo ones?

It's got the diag port with the LED on it, only one of the numbered sockets in it has a connection though. Is this for the injection or ignition/boost ecu's?

Where can i get a code list for it?


Also the throttle butterfly is supprisingly small. Is one from the 2.0 NA enigne and bigger? Would it fit. Im sure there would be some gain from doing that. The pressure drop over the standard one must be silly.








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440 Turbo Fault Codes 400 1993

The Bosch ECU used in the Turbo's doesn't use the same sort of built-in diagnostics as the Fenix ones.

So far I have only seen some sort of light/switchboard which is connected between the ECU connector and the wiring loom and which shows the different sensor readings and such.

The small diag-box on your car may be for the ABS, A/C, airbag, etc. (if you have any of these)

Bye, Arno.








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440 Turbo Fault Codes 400 1993

I've got the late type ABS, so maybe it's for that. Thanks.







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