The car that is in my classroom is a 2007 Nissan Sentra with a Wideband O2 Heater Circuit fault (P1148, P0031) Sign up here to join! [ Ссылка ] There is a 14 day free trial
00:00 - introduction (ground side switch, duty cycle controlled output circuit testing)
01:32 - trouble codes and scan data parameters P1148 and P0031
03:20 - chapter 4 page 6 from my book (O2 sensor side colors)
06:35 - chapter 5 page 19 from my book (O2 heater circuit operation and testing)
09:00 - heater circuit data PIDs
11:30 - discussion of duty cycle, frequency and pulse width
21:28 - is pulse width the same as duty cycle?
23:50 - Ford Taurus injector drop outs link [ Ссылка ]
27:30 - heater circuit on start up (scan data)
29:15 - view of the O2 wires and where to connect the amp probe
33:10 - no current flow found on the O2 heater (possible causes)
36:30 - wiring diagram of the wideband O2
39:40 - ground side switched circuit with no current flow, possible causes
42:50 - voltage testing of the heater circuit begins
49:36 - open in the heater circuit is identified
50:17 - verifying the control circuit integrity and computer driver operation with a test light
1:00:39 - new O2 installed, scope and scan tool waveforms
1:05:30 - resistance testing the heater circuit
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For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium [ Ссылка ] There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
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Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.
