[Engine] 1.6 16V (2005) won't start. Throttle body?

[plazma]

I got it working. The cable had to be disconnected and reconnected before choosing Lexia in the SW. Rpo code did not matter.

Where do I find the readings from the throttle valve position sensor?

You can fin it under general scan -> engine ecu -> parametars
Check this youtube:
https://www.youtube.com/watch?v=TChSMq-qhk8

Edit: Forgot to mention. Also go to Actuator tests and find TB test...
Best regards,
brajomobil

Can't find such menus or choices. Are they in Lexia or Scantool?
I use Diagbox 7.02.

[brajomobil]

In lexia. Go to general test. Then go to engine.

Sent from my LG-F320L using Tapatalk

[plazma]

I now use Diagbox 7.42.
I found the TB test at Lexia -> Diagnosis -> Global test -> Injection -> Parameter measurements -> Standard parameter measurements -> Air inlet.
I tested the throttle body by pressing down the gas pedal. The throttle valve opened and closed. There is however a high pitch noise which is probably related to the fault.
Gas pedal down and valve fully open:
[Image: Air_inlet_test_1.jpg]
Gas pedal free and valve closed;:
[Image: Air_inlet_test_2.jpg]

I checked the current faults.
[Image: Faults.jpg]

After saving and clearing I once tried to start the engine and this fault remained:
[Image: Faults_after_clrearing.jpg]

This is a video of the throttle valve opening when slowly pressing down the gas pedal:




Any suggestions where the fault is or more debugging steps?

[Col]

You need a new crank position sensor

[plazma]

The crankshaft position sensor have been replaced already. Maybe I need to measure the wires and signal.

[Col]

Well you do seem to have a problem in that area
"Engine speed sensor coherance" permanent fault.
If it's not getting a reading, it won't start.

[plazma]

Is there any schematic or ECU pinout available so I could measure from the ECU connector?

[Col]

Should be plug 32V cable id 1361 &1362. pin B1 & B2

[brajomobil]

Should be plug 32V  cable id 1361 &1362. pin B1 & B2

TB motor is near end of life. You will have to change it soon. Probably internal motor resistance has changed and ECU
is raising fault. I am not 100% percent sure it is causing non start issue.

But, CKP sensor is the one you have to check first. If you have change it then check the wires like Col suggested.
If you want to check censor itself you have to have oscilloscope, to see what kind of signal it is sending to ECU.

First rule out CKP , because TB is partially working...

Also on some other forum we tried to help one member who was struggling with no start and CKP issue.
After weeks passed his electric motor starter died. As soon as he changed it car engine started immediately.
It turned out that starter motor was producing some sort of electric signal that was interfacing CKP sensor
signal while it was turning the engine. ECU was receiving wrong signal from CKP and it would not start the engine.
Unfortunately that member did not have oscilloscope. Seeing that CKP signal would be very nice

To rule out the above problem try pushing your car and jump starting it...

Best regards,
brajomobil

[plazma]

Should be plug 32V  cable id 1361 &1362. pin B1 & B2

TB motor is near end of life. You will have to change it soon. Probably internal motor resistance has changed and ECU
is raising fault. I am not 100% percent sure it is causing non start issue.

But, CKP sensor is the one you have to check first. If you have change it then check the wires like Col suggested.
If you want to check censor itself you have to have oscilloscope, to see what kind of signal it is sending to ECU.

First rule out CKP , because TB is partially working...

Also on some other forum we tried to help one member who was struggling with no start and CKP issue.
After weeks passed his electric motor starter died. As soon as he changed it car engine started immediately.
It turned out that starter motor was producing some sort of electric signal that was interfacing CKP sensor
signal while it was turning the engine. ECU was receiving wrong signal from CKP and it would not start the engine.
Unfortunately that member did not have oscilloscope. Seeing that CKP signal would be very nice

To rule out the above problem try pushing your car and jump starting it...

Best regards,
brajomobil

Thanks for the hints.
Is this pinout picture correct:
[Image: 4-00133.jpg]

I'll use my oscilloscope to measure the signals. I'll also remeasure the TB motor windings.
[Image: Rigol_DS1054Z.JPG]