Service Call: Chevy Trailblazer P2138
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Date: 2020-08-05
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Comments and reviews: 10
Smitty
Another Trailblazer failure - I thought I had seen them all. Oh, GM, how we love thy engineering! Can't win in the 21st Century - neither Ford nor Chrysler are any better.
Thinking of ice cream, seems like this summer just blew by in a flash! I've only gone on one small ride this year on the old RD350 2-stroke. Sad! Seems like every year, there's less and less time. Wife and I went for ice cream a month or so ago on the bike - I always get vanilla soft-serve. YUMMM. A couple weekends ago I went on a ride with the Vets from a local Legion (that was the small ride. Ended up winning a top-shelf bottle of brandy! SWEEEEET! I never win anything, usually. Was a nice surprise.
Interesting one! Thanks for sharing.
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Another Trailblazer failure - I thought I had seen them all. Oh, GM, how we love thy engineering! Can't win in the 21st Century - neither Ford nor Chrysler are any better.
Thinking of ice cream, seems like this summer just blew by in a flash! I've only gone on one small ride this year on the old RD350 2-stroke. Sad! Seems like every year, there's less and less time. Wife and I went for ice cream a month or so ago on the bike - I always get vanilla soft-serve. YUMMM. A couple weekends ago I went on a ride with the Vets from a local Legion (that was the small ride. Ended up winning a top-shelf bottle of brandy! SWEEEEET! I never win anything, usually. Was a nice surprise.
Interesting one! Thanks for sharing.
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Ronald
We are blessed with an 03 TB. LT. - These are takeaways I get from this video. 1. Armageddon may not be. 2. There is a 5v reference in cars today like an analog / digital PCB in a computer (of old. This is right in my wheel house. I'm so glad that you put this video up and that I got to see it. If my wife's TB every goes into safe mode with all sensors complaining. Gosh, just measure the 5v ref before sending it off to the scrap heap. It was the fan? That's both cool and alarming. That reference must not be very well regulated.
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We are blessed with an 03 TB. LT. - These are takeaways I get from this video. 1. Armageddon may not be. 2. There is a 5v reference in cars today like an analog / digital PCB in a computer (of old. This is right in my wheel house. I'm so glad that you put this video up and that I got to see it. If my wife's TB every goes into safe mode with all sensors complaining. Gosh, just measure the 5v ref before sending it off to the scrap heap. It was the fan? That's both cool and alarming. That reference must not be very well regulated.
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Lackey
APPS theory. Double POTentiometers on the same shaft. High side of each wired to the low side of the other. Ground one and 5 volts to the other. The wipers must agree at the ECM. One goes up other down. Sum should be close to 5V reference. If not, CEL comes on. SHort the 5Vref to ground and whatever is tied to it in the way of sensors is not going to work right. We have a new ice cream store in Seneca, SC. They freeze in a standmixer bowl instantly WITH LIQUID NITROGEN. FIrst tires, then SHELL gas now ice cream.
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APPS theory. Double POTentiometers on the same shaft. High side of each wired to the low side of the other. Ground one and 5 volts to the other. The wipers must agree at the ECM. One goes up other down. Sum should be close to 5V reference. If not, CEL comes on. SHort the 5Vref to ground and whatever is tied to it in the way of sensors is not going to work right. We have a new ice cream store in Seneca, SC. They freeze in a standmixer bowl instantly WITH LIQUID NITROGEN. FIrst tires, then SHELL gas now ice cream.
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focus
I still disagree with your catch phrase if I can do it, you can do it I am a truck mechanic and work with people who have been mechanics for years and still can't grasp electrical issues.
try explaining multiplexing to them and just get a blank stare. they can swap out a clutch in a freightliner in four hours, but give them a truck with the Nox levels out of range and they are totally lost.
you sir are a electronic fixer upper genius, and not many people are able to reach your level.
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I still disagree with your catch phrase if I can do it, you can do it I am a truck mechanic and work with people who have been mechanics for years and still can't grasp electrical issues.
try explaining multiplexing to them and just get a blank stare. they can swap out a clutch in a freightliner in four hours, but give them a truck with the Nox levels out of range and they are totally lost.
you sir are a electronic fixer upper genius, and not many people are able to reach your level.
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FixThis
Nice work. Very similar to how we repair iPhones. Plenty of circuits using same voltages and narrowing it down by which one is causing all that trouble. Its rarely ever straight forward as the circuit in question being the problem. More likely something else causing an issue with the voltage needed for the particular circuit.
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Nice work. Very similar to how we repair iPhones. Plenty of circuits using same voltages and narrowing it down by which one is causing all that trouble. Its rarely ever straight forward as the circuit in question being the problem. More likely something else causing an issue with the voltage needed for the particular circuit.
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autos
The common thread through a lot of these issues is the approach. The in, outs and signals. What else is on the circuit and what turns on and when does it turn on. That's not to say anything of this is easy, but having a repeatable approach and methodology is paramount. Great job as always sir
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The common thread through a lot of these issues is the approach. The in, outs and signals. What else is on the circuit and what turns on and when does it turn on. That's not to say anything of this is easy, but having a repeatable approach and methodology is paramount. Great job as always sir
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Mr
What a junkie, just can't drive past it can you: -)
Surprised they couldn't of sorted that, such a common one you can actually just pull a couple sensor plugs and have it concluded in 5 minutes.
I think you just set these calls up just for strawberry sundays!
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What a junkie, just can't drive past it can you: -)
Surprised they couldn't of sorted that, such a common one you can actually just pull a couple sensor plugs and have it concluded in 5 minutes.
I think you just set these calls up just for strawberry sundays!
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Richard
I have a 2007 Pontiac G6 with a 2. 4 eco tech that runs good for a day and then it throws a code for the pedal position sensor and mass airflow sensor. Ive replaced the ecm, throttle body and pedal position sensor Im pulling my hair out! Help
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I have a 2007 Pontiac G6 with a 2. 4 eco tech that runs good for a day and then it throws a code for the pedal position sensor and mass airflow sensor. Ive replaced the ecm, throttle body and pedal position sensor Im pulling my hair out! Help
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GNX157
I'm surprised no one sells interconnect boxes to go between the wiring harness and the ECM, with some sort of dip switches on each pin out to allow you to control what's going in and out of the ECM, instead of having to cut the 5v ref.
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I'm surprised no one sells interconnect boxes to go between the wiring harness and the ECM, with some sort of dip switches on each pin out to allow you to control what's going in and out of the ECM, instead of having to cut the 5v ref.
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jose
I need help with mine, I changed few new things still can't fix no codes! Rpm drops a little bit while driving & when it drops makes a. deep hollow muffler noise? Does this more between 30-60mph
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I need help with mine, I changed few new things still can't fix no codes! Rpm drops a little bit while driving & when it drops makes a. deep hollow muffler noise? Does this more between 30-60mph
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