Throttle Position Sensor

Hi Guys,

I have a quick question regarding this bit. Does anyone know how to tell the difference between the 2 track and 3 track sensors?

Also, when you read back the throttle position with Nanocom or another diagnostic tool, does Accel Track 3 read up to 10.000v? According to the rave documentation, it should be 0-5v, but I'm wondering if it's actually Throttle Position as % and not voltage like nanocom is reporting.

Thanks,
Simon

Hi Simon,
Here are the various readings, care of Fery, that may help
THROTTLE
ACCEL. WAY 1 - about 0.3V with the pedal released, about 4.7V with pedal to the maximum position
ACCEL. WAY 2 - about 4.7V with the pedal released, about 0.3V with pedal to the maximum position
ACCEL. WAY 3 – this track must have values very near to the second track.(only 15P-16P engines)
ACCEL. SUPPLY – this value must stay between 4.9 a 5.1

As you can see a 3 track only seems to apply to the latter engines
HTH,
Griff

Landmark2 said:

Hi Simon,
Here are the various readings, care of Fery, that may help
THROTTLE
ACCEL. WAY 1 - about 0.3V with the pedal released, about 4.7V with pedal to the maximum position
ACCEL. WAY 2 - about 4.7V with the pedal released, about 0.3V with pedal to the maximum position
ACCEL. WAY 3 – this track must have values very near to the second track.(only 15P-16P engines)
ACCEL. SUPPLY – this value must stay between 4.9 a 5.1

As you can see a 3 track only seems to apply to the latter engines
HTH,
Griff

Click to expand...

Ahah. This would make sense. I did see they only fitted them to later models for accuracy.

My pedal seems to react 0-10v on track 3. When the pedal is 0% Track 3 reads 0v, when the pedal is 100% it reads 10v, hence why I'm wondering, because my ecu has been set to a 3 track sensor.

I'm wondering if this is the cause of my throttle response issues.

Hi Simon, You didn't say the year of your vehicle but yes earlier ones were only 2 track. So if yours is set to 3 track this could very well be the problem. Try setting it to 2 track and see what happens.
Griff

No worries, from what you say your's is an early modell which was factory fitted with 2 track TPS, it will work with the 3 track one as lom=ng as the ECU is set to 2 track, the 3'r'd track reading is irrelevant in this case cos it's just a falsely generated value, don't set to 3 track a Eu 2 engine cos it will nit run at all, concentrate just on the Track1 + Track 2 = supply ecuation and if this is not so then the TPS or it's circuit is at fault

sierrafery said:

No worries, from what you say your's is an early modell which was factory fitted with 2 track TPS, it will work with the 3 track one as lom=ng as the ECU is set to 2 track, the 3'r'd track reading is irrelevant in this case cos it's just a falsely generated value, don't set to 3 track a Eu 2 engine cos it will nit run at all, concentrate just on the Track1 + Track 2 = supply ecuation and if this is not so then the TPS or it's circuit is at fault

Click to expand...

I've set it to 2 track and it does seem to operate nicer, seems to have less lag pulling up to junctions and doesn't stall as much off road where throttle response is key.

Thanks for the responses though. Now I just have to bleed to clutch line to sort out that pesky engine flaring. Changed the clutch switch, but every now and then, the engine surges and I suspect it's because I've not bled the line yet. To be fair, tempted to leave it bypass as it does seem to have a much nicer driving characteristic.

Also, yes it's the older EU2 engine, 1999 with an MSB (I think that's the right code, not an NNN) ECU.

Also, it was set to 3 track (I'm sure it's a 2 track) and it was running OK in 3 track, but seems better now I've changed it