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  #1  
Old 05-20-2019, 01:21 PM
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2002 bmw x5 3.0 no throttle response

Hello all,

I have a 2002 bmw x5 3.0. Just got it running replaced a bunch of parts (DME, TCU, coil over suspension). Now the car start and runs. Put the car in drive and hit the gas and... nothing. The engine doesnt rev up or anything. But when the car is in drive it will move forward. Im hoping that an indication the the transmission is good. There are engine codes but i dont have those on me as im typing this up. But is there place to start troubleshooting or any ideas?

Thanks
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Old 05-20-2019, 01:39 PM
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Frankly, you will need to pull those codes. Post them up here when you do. Stating another obvious: did you double check that anything you unplugged from the wiring harness is properly seated to its respective sensor?
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Old 05-20-2019, 03:07 PM
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X5 is throttle by wire. There is no mechanical link from the gas pedal it's strictly electronic.

A decent scanner will show you the two pedal position sensors as well as any throttle related error.

There are four throttle sensors. A pair on the pedal and a pair on the actual throttle plate in the engine it's easy to confuse them.

I think you can get to the cable under the hood to manually hit the throttle that will give you some forward progress in finding the missing link.
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Old 05-22-2019, 07:33 PM
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I couldnt inpa working. So I scanned some codes with a regular scanner. I came up with a p1625. Any ideas on when to start?
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Old 05-22-2019, 08:33 PM
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That error says the comouter can't read the pedal position. You need to figure out if the pedal sensor is broken or a wiring problem.


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Old 05-22-2019, 10:19 PM
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Ok where is the pedal position sensor? Is it the same as the throttle position sensor?
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Old 05-22-2019, 10:25 PM
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Nope. The throttle is the vane in the throttle body of the engine that actually controls the rpm.

The "gas pedal" has a pair of potentiometers measure the pedal position and report that to the the ECM.

There are two sensors for redundancy, usually if one fails you can still get hair throttle so I'm thinking of more likely a plug is disconnected either on the ECM side or the gas pedal.


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Old 05-23-2019, 02:55 PM
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ok here are some wiring diagrams. Ill check the gas pedal for connection and update later
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Old 05-23-2019, 08:00 PM
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I removed the gas pedal as the schematic above 3 picture. There are 6 pins on the pedal and looks like 2 potentiometers. I'm thinking resistance moves up and down increasing and decrease the voltage which is the signal to the dme.
I tried to measure resistance at the 6 pins on the pedal and the resistance stayed the same. I think I'm gonna replace the gas pedal.
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Old 05-23-2019, 08:17 PM
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Quote:
Originally Posted by mic2damgood View Post
I removed the gas pedal as the schematic above 3 picture. There are 6 pins on the pedal and looks like 2 potentiometers. I'm thinking resistance moves up and down increasing and decrease the voltage which is the signal to the dme.
I tried to measure resistance at the 6 pins on the pedal and the resistance stayed the same. I think I'm gonna replace the gas pedal.
The resistance value between pins 1 & 5 and also 2 & 3 will remain constant no mater the pedal position, but the resistance should vary when measuring between: -

Pins 1 & 4
Pins 4 & 5

Pins 2 & 6
Pins 3 & 6

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