Wednesday, Dec 16, 2015 at 11:16
My middle nephew has a top-of-the-wozza dual cab Chevy Silverado with Cummins and Allison auto - all $170,000 worth - but one faulty sensor caused the main ECU to go into limp-
home mode right after he left
Halls Creek heading to
Broome.
He was stuck on about 50kmh for the whole trip - and if you want to see the definition of fury, you should see my nephew when he talks about it now. He's a bloke who just hates being held up, he does everything full-on.
The problem then was trying to find someone in
Broome who had the skills, the correct electronic
test equipment, and the repair resources (manuals) to be able to fix it.
They eventually got the problem sorted with extensive assistance from the dealership in
Perth.
The problem with complex designs is that they get too far ahead of themselves in the reliability stakes - so the gains made in levels of driving comfort, ease and safety are then negated by niggly faults and high repair costs, as mechanics spend hours trying to figure which component of the 65 sections of the system could be creating the problem.
Then there's the additional high costs to the owner, in the manufacturer having to stock 10,000 extra parts due to the systems complexity.
The same nephew bought a $750,000 new Cat
grader a couple of years ago - the latest and greatest in Cat design with no steering wheel, just joysticks, and electronics galore.
This machine has 9 ECU's on it, for major control of various operating systems on the machine.
It went great for 3 weeks, then it wouldn't go over 9kmh. Once again, he was infuriated with it, and got Westrac onto the case.
The Westrac fitters spent 3 weeks on it and couldn't find the problem.
Westrac got onto the Cat factory, and Cat actually flew a senior factory engineer to
Perth to sort it out.
He spent 3 days on the machine, and found that due to a software programming fault, one of the ECU's wasn't "talking" to the other ECU's - so it was limiting the
grader speed to 9kmh.
The engineer fixed the programming fault and the machine now performs as it should.
However, the whole deal must have cost Cat a lot of money, and it's an example of how something simple can foul up the most sophisticated electronically-controlled designs and systems.
FollowupID:
862193