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I’m having problems with my 2008 Corvette C6 (Base). It won’t start using the button, and I’ve traced the issue to the car not detecting movement from the clutch sensor. I measured the sensor itself and it’s giving the correct output signal.
What I’m trying to figure out is where that wire actually goes. I’m also not getting the “Press Clutch” message on the instrument cluster anymore, which makes me think something else is wrong too.
I really need to know how the signal wire from the clutch position sensor is routed. Can anyone help me? I’m honestly starting to lose it over this. There’s so much conflicting information online that I don’t even know whether the wire goes to the ECM or BCM, and if so, which pin it connects to.
I’ve measured continuity between the BCM and the relay, and that wire is good. I can also start the engine if I hotwire the starter relay, so the car does start. The problem is that it’s not getting a crank signal.
I’ve already replaced the relays and they are the correct ones. I’ve checked the fuse block as well, and it’s fine.
Please, please help me. I’m going crazy trying to solve this
in my 07' it goes to the ECM and you can simply jumper it. At some point they went to either a multi-stage switch or a rheostat which is more complicate, I'm not sure which year
It was changed in 2008 to a sensor instead of a switch. The 5V, ground, and output signal are working as they should. I suspect a break in the signal wire, but it’s very difficult to find the pinout for the exact correct version.
How EXACTLY did you measure the sensor and know its the sensor ??...it is a 3 wire sensor...all 3 wires go to the ECM and the signal wire is terminal 26 on the X1 connector...have you checked for "control" at the crank relay which is 12 volts from the ECM...if you had an aftermarket factory level scan tool you can see all the inputs needed for starting as well as any communication issues (U codes) which will also keep the car from starting...the video will show you how this is diagnosed...you also need to see if the RUN/CRANK relay on the bottom of the BCM is working also by seeing if the ECM fuse is being powered as shown in the video with igntion ON...you DON'T rely on "online" information...you rely on FACTORY SERVICE INFORMATION ONLY !!....no need to go crazy....just follow the data !!!
I live in Sweden, and finding information about Chevrolet here is not easy. There are only a few specialized dealers in the country, and very few that are truly skilled when it comes to service and diagnostics. Because of that, it is difficult to find reliable information and support. Finding information online is also difficult unless you are used to searching for it or have access to the right resources.
I have a Corvette that was imported from the USA so it is not a European version.
I have checked the sensor and confirmed that it has a 5-volt supply signal, that it has ground, and that the output signal varies between approximately 0 and 5 volts at its end positions.
To be absolutely sure, I have tested it with two different sensors — a new one and the original existing sensor.
I have found some diagrams, but none of them seem to match. I am extremely grateful for the help I have received. I will check what you have written and see if it helps me move forward.
I use Alldata DIY but you can't access it in your country...if you are able to use a VPN on your computer using a server from the USA you can do it that way and should be able to get it...this is what you should see on a factory level scan tool ignition ON and then when starting the car...you can see the clutch switch input "released" ignition on and "applied" when starting the car....you also look for a "crank request" and the "starter relay command"...VERY few are skilled in diagnostics in this country also whether a repair shop or dealership...having a scan tool like this is needed as you can see in the video.
I only have a Tech2 (Chinese) 😔
Gone for the weekend, will check every suggestion on Monday. I am grateful for all help I can get.
With your Tech 2 look at your data PIDS under "electrical/ theft" data...you will see your inputs needed for starting...can't remember if the CPP sensor is there.
Today I’ve been doing some checking and measurements, but I haven’t found any major faults. I did find a blown 2-amp SWC-DM fuse. As far as I understand, it shouldn’t actually have anything to do with the start button(?), but after replacing it the car starts with the button regardless of whether the clutch is pressed or not. What can be concluded or investigated from this?
Well what does your CPP switch data PID look like with your Tech 2...does it say "applied" without down pushing on the clutch ??...maybe this diagnosis is over your head...find a shop in your area...these Corvettes aren't special !!...you have to do the testing.
Absolutely, but without access to the correct information I chose to try a cheap sensor. It’s much easier to narrow it down now with your help.
I hope I can continue asking for help since I am a body work guy and not specialist in electrical issues.
Absolutely, but without access to the correct information I chose to try a cheap sensor. It’s much easier to narrow it down now with your help.
I hope I can continue asking for help since I am a body work guy and not specialist in electrical issues.
Yes OEM, still not expensive so I gave it a try.
I checked the signal with the Tech2 this morning and it does not detect the sensor. I am not fully convinced my Chinese tech2 is upp to standard. It Will not go into sensor relearn either, it just stops without any information.
I will try my Icarsoft CR max if it’s any better.
I am baffled that the car suddenly crank and start,
Yes OEM, still not expensive so I gave it a try.
I checked the signal with the Tech2 this morning and it does not detect the sensor. I am not fully convinced my Chinese tech2 is upp to standard. It Will not go into sensor relearn either, it just stops without any information.
I will try my Icarsoft CR max if it’s any better.
I am baffled that the car suddenly crank and start,
What do you mean by it won't "detect" the sensor ??...is the data PID not there ??...maybe take a screenshot of what you're seeing and post it.
Well I'm probably not the one on this Forum you want to bash especially a Moderator so you'll be getting 30 days in "timeout'...judging by your post back in 2021 and your interaction with @feeder82 you seem to have somewhat of an "attitude"...when you come back and if this continues you will be banned PERMANETLY from this Forum...thread lightly !!!
I live in Sweden, and finding information about Chevrolet here is not easy. There are only a few specialized dealers in the country, and very few that are truly skilled when it comes to service and diagnostics. Because of that, it is difficult to find reliable information and support. Finding information online is also difficult unless you are used to searching for it or have access to the right resources.
I have a Corvette that was imported from the USA so it is not a European version.
I have checked the sensor and confirmed that it has a 5-volt supply signal, that it has ground, and that the output signal varies between approximately 0 and 5 volts at its end positions.
To be absolutely sure, I have tested it with two different sensors — a new one and the original existing sensor.
I have found some diagrams, but none of them seem to match. I am extremely grateful for the help I have received. I will check what you have written and see if it helps me move forward.
No crank, clutch position sensor
