CO sky high

Which wires are the voltage, does this run its earth from the Chassis or form one of the wires?

Cheers Si

Please don't top post, it makes it harder to respond. :-))

All wires on the ATS and TPS go back to the ECU

On the ATS one will be an earth, one will be the signal return. Not sure of the colours.

On the TPS one will be 5v supply one earth, one signal.

Regards, Graham L

Is it likly the TPS could go faulty or is it more likely that its giving me this error code because its something else?

Ta Si

It is possible to get spurious codes. Always worth clearing the codes, drive a couple of miles and then see what has come back.

Remember the codes are pointing to a component circuit not necessarily the component itself. So a fault code for the TPS could be either the TPS or the wireing between the TPS and the ECU. (or even an ECU fault or ECU earth problem.)

Check the ouptuts of the sensors.

Regards, Graham L

Hi Graham,

I`ve meter the voltages out on a Digital meter set at upto 20V, here are the readings:-

With the Engine Running:-

Red to Earth on Normal throttle is 4.85 Red to Earth at 3500RPM is 4.85 Green to Earth on Normal throttle is 5.10 Reen to Earth at 3500RPM is 5.16 Yellow to Earth on Normal throttle is 0.06 Yellow to Earth at 3500RPM is 0.11

With the Engine Off (Just the Ihnition on):-

Red to Earth on Normal throttle is 4.87 Red to Earth at Full Throttle is 5.02 Green to Earth on Normal throttle is 5.07 Reen to Earth at Full Throttle is 5.07 Yellow to Earth on Normal throttle is 0.04 Yellow to Earth at Full Throttle is 0.4

Thanks Again Cheers Si

On Fri, 29 Aug 2003 18:50:48 +0100, "Simon Green" wrote: L

Ok, the above shows that the earth point to the TPS (supplied by the ECU - yellow wire) is OK as it is nearly zero volts.

The Green wire is the supply voltage to the TPS 5v - Fine.

The Red wire is the signal to the ECU. At throttle closed it should be about 0.7 v and at WOT around 4.5 v BINGO you have a faulty TPS. All the figures are too high.

Basically the ECU is being told that you have your foot to the floor ALL THE TIME.

Regards, Graham

TPS- pin 1 signal to ecu (0.9v to 4.5v WOT) pin 2 5v pin 3 0volts or earth.

Tim..

TPS is easy to fit, just make sure the TPS lever is actuated by the throttle lever. When hot and ticking over the volts out should be between 0.8 v and 0.6v

IIRC the ATS is located on the air filter housing.

Regards, Graham