Tried to check sensor this morning to solve an auto g'box problem.

But voltages are nothing like what's in the manual.

ie. outer contacts = 9v at idle and 0v when open slightly

top 2 contacts = 0v idle 12v open slightly

bottom 2 = 9v idle 12v open slightly

Is that 5v and 0-4.2v thing just for early engines?

Mines a '94 n/a. Thanks.

Are you talking about the TPS (Throttle position sensor) which is located on the side of the LHS throttle body? If so, you need to check the voltage to the white wire (middle wire from memory) and set it to anything between 0.44v-0.46v

Are you testing the TPS 'cos I thought it was supposed to be 0.45v (while connected).

Also, may sure you unplug the sensor after correctly adjusting it for at least 15 seconds while engine is running to reset the ECU.

There you go, he beat me to it.

Yes it's the tps. I think there's something wrong here. The supply voltage is supposed to be 5v but measures 9v. I'm measuring voltages between the pins, should I be measuring between one pin and earth?

The TPS connector is the one on a lead, the connector on the front of the box is the closed throttle switch.

Ah, that might explain it, let me go and have another look.

Ok, all done, voltages were ok. Was looking at the wrong plug! Thanks all.