Help reading engine codes

[quattro at isham-research.com]

> Take the cover off the switches, get the engine idling, and manually
> close
> the full load switch while the idle switch is still closed.  Look at
> the
> rev
> counter - if it says 7000 rpm even though the engine is only idling
> -
> that's
> what you have.
>
> 
> I did that and I got 7000 rpm indicated.  So what is the procedure
> now?

Right.  Brake light circuit must be working.  Drive the car and reproduce the problem condition.  Run for at least ten minutes, go above 80 Celcius, 3000 rpm and 1.2 bar.  Accerleate hard at least once in third gear.

The ECU's memory is volatile and the results are lost if the ignition is switched off - they're also erased when they're read.

Park with the engine running and repeat the trick to get the 7000 rpm indication.

Tap the brake pedal to step the ECU through its codes.

Look at the rev counter and check engine light:

1000 rpm   OFF    RPM sensor
1000 rpm   ON     Knock control
2000 rpm   OFF    Ignition timing sensor
2000 rpm   ON     Knock sensor
3000 rpm   OFF    Hall sensor
3000 rpm   ON     Intake air temperature sensor
4000 rpm or 6000 rpm OFF  ECU vacuum hose or idle switch
4000 rpm   ON     Coolant temperature sensor
5000 rpm   OFF    ECU pressure sensor
7000 rpm   OFF    No more codes

--
 Phil