2002 bmw x5 3.0 no throttle response

[andrewwynn]

PWG is the pedal. MDK is the throttle.

Both pedal voltages should change I think one goes up one goes down.

Does the MDK change when you manually move the throttle plate?

[mic2damgood]

i took some video on test out moving the throttle plate manually. Some reason couldn't upload the video. So i guess i will try to explain it here.

So i hook up inpa and first test out the gas pedal signal. PWG-angle , PWG-voltage Poti 1, PWG-voltage Poti 2 all moved when i pressed the gas pedal to the floor and release. Nothing else moved or responded to the this test.

Then i got out of the vehicle. Placed the laptop so i could see it. Then i moved the throttle plate manually, with my finger like a poster suggested.

The DKP-angle , MDK-voltage Poti 1, MDK-voltage Poti 2 all responded when i moved the throttle plate by hand..

Does this mean replace throttle body?

[wpoll]

Originally Posted by mic2damgood

i took some video on test out moving the throttle plate manually. Some reason couldn't upload the video. So i guess i will try to explain it here.

So i hook up inpa and first test out the gas pedal signal. PWG-angle , PWG-voltage Poti 1, PWG-voltage Poti 2 all moved when i pressed the gas pedal to the floor and release. Nothing else moved or responded to the this test.

Then i got out of the vehicle. Placed the laptop so i could see it. Then i moved the throttle plate manually, with my finger like a poster suggested.

The DKP-angle , MDK-voltage Poti 1, MDK-voltage Poti 2 all responded when i moved the throttle plate by hand..

Does this mean replace throttle body?

Sounds like the TB actuator motor is either dead or not getting power...

Here's some info: -

[Operation]

https://www.newtis.info/tisv2/a/en/e...le-edk/XjU9VWi

https://www.newtis.info/tisv2/a/en/e...le-edk/YHvbema

[Wiring]

https://www.newtis.info/tisv2/a/en/e...le-edk/ajjhHmj

https://www.newtis.info/tisv2/a/en/e...0i-sav/WjBEqhx

[andrewwynn]

You need to find the input to the throttle motor at the throttle body. If it's getting power and signal it's shot


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[mic2damgood]

ok so today i replaced the throttle body. Still no engine response when i hit the
gas pedal. So tomorrow or some time next week. I will check for power and signal going to the throttle body from the DME. Hopefully wont need another DME

[andrewwynn]

My bet is on wiring.

The wiring could be inside the DME module it's not too difficult to get inside. IIRC you can just unscrew it was the TCM that I needed to drill out rivets. You said the connector was corroded that hints strongly the corrosion will also be inside you might need to clean/reflow some solder joints.

[mic2damgood]

the dme and the ews was recently replaced with the new new key and ignition. I purchased them all together. Both the dme and TCM were replace because of moisture. After i replaced these computers thats when i finally got the car started.

[mic2damgood]

Originally Posted by wpoll

Sounds like the TB actuator motor is either dead or not getting power...

Here's some info: -

[Operation]

https://www.newtis.info/tisv2/a/en/e...le-edk/XjU9VWi

https://www.newtis.info/tisv2/a/en/e...le-edk/YHvbema

[Wiring]

https://www.newtis.info/tisv2/a/en/e...le-edk/ajjhHmj

https://www.newtis.info/tisv2/a/en/e...0i-sav/WjBEqhx

I was reading through the link you have provided. Is there some kind of adaptation procedure that i can performed? Is there documentation on how to do it? And, do I need to do it with this car that has my problem?

[andrewwynn]

You would want to reset adaptations after getting it working but it's not what is making it not work. Most likely a broken wire/contact/trace


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[mic2damgood]

ok i took out the DME and inspected the board for and trace burnouts. Everything looks good didnt really see anything that looked bad.

I did find one wire (BRN/WHT) on the schematic that seems to be labeled wrong. The wire on the DME is (BRN/BLk). Either way the wire is connected correctly in both places (DME to the connector on the throttle).

Ohm out each pin on the electronic throttle actuator connector. From the throttle connector to the pins on the DME and All wires looked good!!
I connected everything back together and put and volt meter on pin 6 and pin 4. Turn the key to second position and hit the gas pedal. Got no voltage across the throttle motor.

Numbers in orange are the wire to the DME below

Question: Is the DME always supplying 5v or is it sending ground? Could the DME be bad? Is there anything, like a engine code or safety feature keeping DME from operating the throttle?

labeled below: are the [gry/wht] and [brn/wht] on the schematic. But the wire is the picture is [brn/blk].