Search found 86 matches

by Rfmotors1
Mon Mar 25, 2024 8:50 am
Forum: Diagnostic discussion
Topic: Interesting CAN BUS fault on 2018 Landrover discovery
Replies: 5
Views: 361

Re: Interesting CAN BUS fault on 2018 Landrover discovery

Just small update, I have added the CAN ID in decimal numbers and sorted from small to high.
by Rfmotors1
Sun Mar 24, 2024 2:00 pm
Forum: Diagnostic discussion
Topic: Interesting CAN BUS fault on 2018 Landrover discovery
Replies: 5
Views: 361

Re: Interesting CAN BUS fault on 2018 Landrover discovery

Hi RYM6746, Just by looking on your waveforms, the good one has high load compared the problematic one. I mean there is so many more frames sent on the good one, it is probably due to engine not running when you have captured the waveform of faulty vehicle. Also by looking at the affected frames, it...
by Rfmotors1
Fri Mar 22, 2024 9:14 pm
Forum: Heavy Duty and Off Highway
Topic: Setra 517 HD Clutch position sensor
Replies: 6
Views: 187

Re: Setra 517 HD Clutch position sensor

I would try all what Ben advised and also unplug the sensor as you suggest, to see if the signals will both go high. If the bearing is not an active actuator itself but a sensor only, and as you said there are two potentiometers, it sounds like a double signal sensor, as back up like design where th...
by Rfmotors1
Fri Mar 22, 2024 4:12 pm
Forum: Heavy Duty and Off Highway
Topic: Setra 517 HD Clutch position sensor
Replies: 6
Views: 187

Re: Setra 517 HD Clutch position sensor

Hi flaurits, Here is my explanation: First how such sensor/device works. (I may be wrong as I have never seen such machine) If it is what I think, many such applications are in passenger cars. There is a PWM signal from the ECU which is desired position of the device, then the device carry out the t...
by Rfmotors1
Wed Mar 20, 2024 7:55 am
Forum: Diagnostic discussion
Topic: Kia Ceed 3 1.6 diesel alternator ripple test
Replies: 6
Views: 292

Re: Kia Ceed 3 1.6 diesel alternator ripple test

Hi, The best practice to find out where the spikes come from is to use other channel and read other signals. For example if the injectors would be the spike sources, the signal (falling or rising edge) would always match the spike on the original signal (here it would be your alternator ripple wavef...
by Rfmotors1
Wed Mar 20, 2024 7:51 am
Forum: PicoScope 7 Automotive software
Topic: Connecting scope stalls engine
Replies: 8
Views: 378

Re: Connecting scope stalls engine

Thank you for the update.
If you would have time, please try to upload the waveform here.
It will help many other Picoscope users as we all need to learn.
And this forum here is the best place to share our stories from real diagnostic situations.
Best Regards,
Roman
by Rfmotors1
Thu Mar 14, 2024 6:50 am
Forum: PicoDiagnostics NVH
Topic: Giving Up on the Source
Replies: 2
Views: 133

Re: Giving Up on the Source

Hi Josh, I have personal experience from Bentley dealerships where noise is extremely important to customers as the expectation is far higher than at premium brands as Mercedes or Audi. The NVH plays major role in decision and demonstration to customer (printed report) where customer feels the "nois...
by Rfmotors1
Wed Mar 13, 2024 7:12 am
Forum: Case studies
Topic: Cayenne V6, NVH to locate origin of engine knock, click, misfire
Replies: 7
Views: 1992

Re: Cayenne V6, NVH to locate origin of engine knock, click, misfire

Hi Mike, Thank you for the question, you are right as I did not properly explain how I got to the numbers. Engine firing order is 1-5-3-6-2-4 and I had the COP pick up probe on Cyl 1, then just by first look on the NVH sensors the highest amplitude was visible and I have marked it by rulers to range...
by Rfmotors1
Mon Mar 11, 2024 12:46 pm
Forum: PicoScope 7 Automotive software
Topic: Connecting scope stalls engine
Replies: 8
Views: 378

Re: Connecting scope stalls engine

Let's say if the channel A probe positive goes to one of the two wires on the crank sensor and the same probe Ch A negative side on the second sensor wire. The scope should measure the voltage across this two wires. However, there is not positive or negative side as it is basically AC signal. Then o...
by Rfmotors1
Sun Mar 10, 2024 5:07 am
Forum: Diagnostic discussion
Topic: Kia Ceed 3 1.6 diesel alternator ripple test
Replies: 6
Views: 292

Re: Kia Ceed 3 1.6 diesel alternator ripple test

Hi, I am looking at your picture and here is my interpretation. (correct or not, we always find later) There are regular waves and two spikes repeating in the waveform. Let's say the waves are matching the alternator rotation and windings modulated by diods, then the alternator operation has predict...