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New Kvaser white paper discusses ways to maximise CAN’s efficiency in next generation vehicles


By using a Virtual CAN Bus, we separate the control task from other tasks. The distributed embedded control system can be developed using standard CAN Controllers and transceivers in a traditional way with well proven tools.

Other tasks such as encryption, transmitter authentication, re-flashing, etc. can be developed by experts in these fields and carried out by using other protocols. With modern technology, the different tasks can run in parallel and simultaneously communicate on the same physical layer.

It is a great advantage to separate the control problems from other problems. The control problem can be solved once and for all by the control experts and other problems by experts in their respective technology fields.

 

Details here......

 

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CAN Test Box

can test box

 

Continuing with our mission to make vehicle diagnostics easier and faster…the new CAN Test Box gives you easy access to the 16 pins of the diagnostic connector that is fitted to all modern vehicles. Depending on the configuration of the vehicle, this may allow you to check power, ground and CAN Bus signal quality. With the test leads supplied you can connect your PicoScope lab scope to the CAN Test Box to monitor signals such as the CAN High and Low. More.....

Attention all
Automotive Scope Users


Pico Automotive Scope software now sports a new Waveform Library browser.
Must own PicoScope to view.
See details here

 

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Skoda Octavia Crankshaft Reluctor

 
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By George Cameron
Ibrox Vehicle Repairs & Diagnostics Ltd.

The fault

Skoda

This vehicle was recovered from another garage after having its engine rebuilt. It would start and then cut out.

Diagnosis

There was a fault code of "engine speed sensor implausible signal". We checked the output of the crankshaft position (CKP) sensor and found an irregularity in the waveform:

figure 1

Figure 1: Several crankshaft revolutions.
Upper trace: Camshaft (CPS) sensor. Lower trace: Crankshaft (CKP) sensor.

We zoomed into the area shown by the dashed red box above to get more detail:

figure 2

Figure 2: Zoomed in to a single crankshaft revolution.

The crankshaft waveform (lower trace, blue) shows an obvious fault 7 to 8 teeth after TDC. Removing the crankshaft sensor and looking with a borescope, I could see that the reluctor ring had two slightly bent teeth.

Repair

I removed the sump and realigned the two bent teeth, and all was well.

Total time for diagnosis and repair: 1.5 hours

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