Written by Jordan Aylott, Diagnostics Category Manager at Precision Automotive Equipment
The Autel MSUltra is nearing on a year of its initial release date and I keep getting surprised by how this tool has increased my efficiency in diagnosing vehicles. With simple ways to guide and direct the user into diagnosing the ever-increasing faults we see in modern day vehicles.
I have shared a couple of case studies of vehicles I have had recently where the MSUltra has made the diagnostic process a simple one.
Case Study 1:
2012 Land Rover Free Lander 2
Engine light on – P008B-00. Low pressure fuel system – Pressure too high
This vehicle still ran which led me to think of a bad fuel pressure sensor or potentially a wiring issue between the sensor and the ECU. I decided while I had the MSultra still plugged in that I would check to see what else it could offer in terms of information to help with the diagnosis of this fault code.
I checked the Intelligent diagnostics function in the tool and found a Technical Service Bulletin (TSB) available to view in relation to the fault code that I had. The TSB stated that this fault code was potentially related to a faulty fuel pressure sensor on the low-pressure side.
Two methods of checking the sensor in relation to this fault code were listed, the first stated to check freeze frame data for the voltage of the sensor at the time the fault code appeared. The second, a way to check by monitoring the sensor voltage in live data. Both methods stated if the result was 4.75V that the sensor had failed internally and need replacing.
After fitting a new sensor, the fault code cleared.
Case Study 2:
2012 Mercedes C200
Selector stuck in “P”. Fault messages on instrument cluster.
This Vehicle would not start, it had CAN bus communication faults in the transmission control unit and the SAM module.
The Intelligent diagnostic function in the MSultra had a TSB available to view in relation to this fault, which was listed by symptom.
The TSB directed me to check the “no-load current relay” in the engine compartment fuse box. After testing the relay, I found that it would not close, which was causing the issues.
After replacing the related fuse, and clearing the fault codes, the selector could be moved from park and the car could be started.
Using the MSUltra in the above case studies saved a lot of time on what could have been a lengthy diagnostic process, justifying why this tool has been one of our best sellers this year.
For more information on the MSULTRA, of any of the other products we offer, speak to your local Precision branch. Contact 1300 366 252.