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Oscilloscope Training

1997 Mercedes-Benz E320 Misfire

Automotive Test Solutions
1997 Mercedes-Benz E320 Misfire
1997 Mercedes-Benz E320 Misfire

1997 Mercedes-Benz E320 Misfire

29:40
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2008 Nissan 370Z - No Start - No Stored Fault Codes - See How to Diagnose a camshaft timing fault

2008 Nissan 370Z - No Start - No Stored Fault Codes - See How to Diagnose a camshaft timing fault

27:04
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How to Diagnose a 2014 Chrysler Town & Country 3.6l with an Engine Misfire - P0300 P0305

How to Diagnose a 2014 Chrysler Town & Country 3.6l with an Engine Misfire - P0300 P0305

34:58
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2008 Subaru Legacy Stalling

2008 Subaru Legacy Stalling

01:01:19
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2002 Ford Excursion 6.8L Stalling Problem

2002 Ford Excursion 6.8L Stalling Problem

43:49
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1999 Toyota 4Runner 3.4L with Knock Sensor 1 DTC

1999 Toyota 4Runner 3.4L with Knock Sensor 1 DTC

28:58
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2. CAN high speed bus at 2MS on screen A

4. CAN high speed bus at 4MS

6. CAN high speed bus at 4MS on screen A

8. CAN high speed bus at 40MS

 

10. Controls & Stacked Scope

 

12. Setup & Dual Scope A Time Base Only

 

14. Setup & Meter

 

 

 

 

 

 

 

 

 

 

 

2: 740 Volvo Crank Trigger and Coil Signals

 

4: eSCOPE Feedback with 10 percent

add to MAF

Yellow trace is MAF input to eSCOPE

Purple trace is EScope output to PCM

6: Front and Rear O2 Sensors

 

8: Honda Coil Feedback at Coil

10: Honda Coil Timing Signals

 

 

 

12. 4.2 Liter Jeep Carburetor Circuit

14. This waveform was taken at the fuel pump relay (power side of fuel pump) with a current clamp after fuel had been added to the empty fuel tank. Note the Freq (Hz) is 79.26 and multiply this by 60 sec. to find the RPM of the fuel pump was 4755.6 RPM.

16. This GM vehicle was still running and came into the shop for an intermittent stalling problem. The vehicle never stalled but the problem was found using an Amp clamp on the power wire to the fuel pump.

 

 

 

 

 

20. This shows the front and rear O2 sensor signals. The yellow and red traces are the front O2 sensors. The green and blue traces are the rear O2 sensor signals.

22. This stacked chart shows the timing signals and the injector waveforms. Note the injectors are out of sequence and the orange trace shows 50ms of on time. This is a logic problem in the PCM.

24. This is the same waveform that has the Honda logic problem spike but the format has been changed. Note the yellow trace spike aligns with the falling edge of the module signal. This occurs when the coil is fired.

 

26. The yellow, red, green, and blue traces are the signals to the ignition modules in the coil on plug system. The white and purple traces are timing signals sent from the distributor.

 

28. This GM 3100 was missing. When checking the injector voltage waveform the green trace does not have the closing bump which indicated the injector did not open.

 

 

 

 

 

 

 

 

 

 

30. This Nissan was missing. When the injector voltage waveforms were checked the current in the yellow trace was low. The green trace shows proper current. The connection was bad at the injector.