start issue
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4th Gear
Joined: Aug 2023
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start issue
I got this strange start issue quite a while, when press start button I hear 2 soft clicks but nothing happens.
All things works ok expect car won't start. I can go on fuse box and ground one pin (got instructions for this) and that way start engine .. but that's just temporary as next time it's same issue.
Now this have been on few places for repair and no-one really finds any cause for this, usually they say that they just clean grounding and get it working. (might even work ok year or two)
But from last repair it's only few weeks and now this hits again, anyone had similar issues with C6 or ideas what is causing this?
All things works ok expect car won't start. I can go on fuse box and ground one pin (got instructions for this) and that way start engine .. but that's just temporary as next time it's same issue.
Now this have been on few places for repair and no-one really finds any cause for this, usually they say that they just clean grounding and get it working. (might even work ok year or two)
But from last repair it's only few weeks and now this hits again, anyone had similar issues with C6 or ideas what is causing this?
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,418
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From: Cape Coral, Florida
See you are in Finland and yes there may be issues getting the car fixed properly…first thing to have checked is the battery whether for a starting issue or any other electrical issue…fully charged battery is 12.66 volts…if you hear more than 1 click that’s good…what kind of test equipment do you have ??…a DVOM and 12 volt test light would be good…we just have to find out if this starting issue is on the control or load side of the system…what pin did you ground and it’s a good idea to include in your profile model year, modifications, a tune, A/T or manual etc…
Thread Starter
4th Gear
Joined: Aug 2023
Posts: 4
Likes: 0
See you are in Finland and yes there may be issues getting the car fixed properly…first thing to have checked is the battery whether for a starting issue or any other electrical issue…fully charged battery is 12.66 volts…if you hear more than 1 click that’s good…what kind of test equipment do you have ??…a DVOM and 12 volt test light would be good…we just have to find out if this starting issue is on the control or load side of the system…what pin did you ground and it’s a good idea to include in your profile model year, modifications, a tune, A/T or manual etc…
Battery was tested few weeks ago and is ok as I asked because after winterizing it's not first time to battery die even though used maintenance charger.
Checking from online diagram I think it's crank (43) pin (14) to get it starting. I think even one shop said that they unplug battery did the trick and was working ok again (for a while).
2005 C6 (export) model, no modifications except exhaust change, no tunings, automatic.
I have quite limited test equipment as I'm not really too much of car tech guy 😊
Thread Starter
4th Gear
Joined: Aug 2023
Posts: 4
Likes: 0
bit reading of this C6 no crank / no start - CorvetteForum - Chevrolet Corvette Forum Discussion
so if I can start engine by grounding (engine) crank relay it means FOB check and break pedal checks are ok?
and only ECM part is not ok (either ECM itself have issue or checking that gear is park/neutral)?
so if I can start engine by grounding (engine) crank relay it means FOB check and break pedal checks are ok?
and only ECM part is not ok (either ECM itself have issue or checking that gear is park/neutral)?
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,418
Likes: 3,974
From: Cape Coral, Florida
We have few good repair shops which have good knowledge of vettes, but atm both can't find any reason for this.
Battery was tested few weeks ago and is ok as I asked because after winterizing it's not first time to battery die even though used maintenance charger.
Checking from online diagram I think it's crank (43) pin (14) to get it starting. I think even one shop said that they unplug battery did the trick and was working ok again (for a while).
2005 C6 (export) model, no modifications except exhaust change, no tunings, automatic.
I have quite limited test equipment as I'm not really too much of car tech guy 😊
Battery was tested few weeks ago and is ok as I asked because after winterizing it's not first time to battery die even though used maintenance charger.
Checking from online diagram I think it's crank (43) pin (14) to get it starting. I think even one shop said that they unplug battery did the trick and was working ok again (for a while).
2005 C6 (export) model, no modifications except exhaust change, no tunings, automatic.
I have quite limited test equipment as I'm not really too much of car tech guy 😊
Being that you said you are not much of a tech guy with limited equipment and as you said there are knowledgeable shops in your area best bet is to take it to one of those shops…just my 2 cents…and Corvettes are not “mystical” cars that can only be fixed or diagnosed by Corvette shops or dealerships…only thing different parts wise is the fuel system and the torque tube…if you know how different circuits function…solenoids, relays, 3 wire sensors, thermistor etc…any decent tech can fix or diagnose one.
Last edited by C5 Diag; Aug 26, 2023 at 11:03 AM.
