How To Put Your Corvette Into "True" Accessory Mode
01-11-2019, 05:48 PM
#1
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How To Put Your Corvette Into "True" Accessory Mode
So I realized that there are a number of people that are not sure of how to put their vehicles with Push-Button Start / Keyless Ignition into Accessory/On mode (without the vehicle actually running. Getting into the vehicle and pressing the start button one quick time without your foot on the brake and/or clutch will put your vehicle into Accessory Mode. However, as I mention in the video, if you're attempting to leave the house early in the morning / late at night and you parked the car with the exhaust set to Sport or Track, you fear waking the entire household. I show you how to keep that from happening in the video.
Last edited by Josh@JeffSchmittAuto; 01-12-2019 at 09:24 AM.
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01-11-2019, 06:42 PM
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St. Jude Donor '11-'12-'13, '16-'17-'18
That's not Accessory Mode, that is actually the same as being full ON but without actually cranking the engine (or the engine running)
Last edited by KenHorse; 01-11-2019 at 06:44 PM.
01-11-2019, 06:51 PM
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St. Jude Donor '11-'12-'13, '16-'17-'18
01-11-2019, 07:13 PM
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St. Jude Donor '11-'12-'13, '16-'17-'18
M7 - Press and release START button without depressing clutch.
Auto - Press and release START button without depressing brake (I believe this to be true but I've never owned an auto C7)
This places the car into RAP mode (Retained Accessory Power). However not all features are accessible in this mode, hence the OP's post. But what he demonstrates is NOT "Accessory Mode"
Auto - Press and release START button without depressing brake (I believe this to be true but I've never owned an auto C7)
This places the car into RAP mode (Retained Accessory Power). However not all features are accessible in this mode, hence the OP's post. But what he demonstrates is NOT "Accessory Mode"
Last edited by KenHorse; 01-11-2019 at 07:15 PM.
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V Vette (01-11-2019)
01-11-2019, 07:26 PM
#6
Accessory mode is the quick push and release of the button without stepping on the brake or clutch that does not enable all the features that are on when running. Back in the old days it was used (usually by turning the key backwards or one click forward) to turn things on without energizing the ignition circuit, which could burn ignition points under the right conditions.
The only real difference between accessory mode now and then is that it times out after a short period rather than staying on as it used to. Holding the start button without the brake until it goes full on is good for using the FM radio at the drive in movie since there is no concern for those pesky points anymore.
Another cool trick is holding the start button with both the brake pedal pressed and the throttle pedal pressed to the floor. That will crank the engine without starting until the throttle is released which is (opinion here!) a good idea if the car has not been started for a long time. That's how it works with the A6 tranny anyhow, not sure about the M7.
The only real difference between accessory mode now and then is that it times out after a short period rather than staying on as it used to. Holding the start button without the brake until it goes full on is good for using the FM radio at the drive in movie since there is no concern for those pesky points anymore.
Another cool trick is holding the start button with both the brake pedal pressed and the throttle pedal pressed to the floor. That will crank the engine without starting until the throttle is released which is (opinion here!) a good idea if the car has not been started for a long time. That's how it works with the A6 tranny anyhow, not sure about the M7.
01-11-2019, 10:20 PM
#7
01-11-2019, 10:38 PM
#8
As Ken says, this is not "true accessory mode," No such thing. this is called SERVICE or SERVICE ONLY MODE. If you want to read more, it's explained in the OM.
This is the same as old keyed ignitions in the ON position (as opposed to ACC position for the key), where most if not all things are the same as when the engine is running. You can even run codes in it.
Beware, this does not time out like ACCESSORY MODE will. You will need to exit this mode, or you will come back to a dead battery.
This is the same as old keyed ignitions in the ON position (as opposed to ACC position for the key), where most if not all things are the same as when the engine is running. You can even run codes in it.
Beware, this does not time out like ACCESSORY MODE will. You will need to exit this mode, or you will come back to a dead battery.
Last edited by owc6; 01-11-2019 at 11:22 PM.
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V Vette (01-12-2019)
01-12-2019, 12:40 AM
#9
Accessory mode is the quick push and release of the button without stepping on the brake or clutch that does not enable all the features that are on when running. Back in the old days it was used (usually by turning the key backwards or one click forward) to turn things on without energizing the ignition circuit, which could burn ignition points under the right conditions.
The only real difference between accessory mode now and then is that it times out after a short period rather than staying on as it used to. Holding the start button without the brake until it goes full on is good for using the FM radio at the drive in movie since there is no concern for those pesky points anymore.
Another cool trick is holding the start button with both the brake pedal pressed and the throttle pedal pressed to the floor. That will crank the engine without starting until the throttle is released which is (opinion here!) a good idea if the car has not been started for a long time. That's how it works with the A6 tranny anyhow, not sure about the M7.
The only real difference between accessory mode now and then is that it times out after a short period rather than staying on as it used to. Holding the start button without the brake until it goes full on is good for using the FM radio at the drive in movie since there is no concern for those pesky points anymore.
Another cool trick is holding the start button with both the brake pedal pressed and the throttle pedal pressed to the floor. That will crank the engine without starting until the throttle is released which is (opinion here!) a good idea if the car has not been started for a long time. That's how it works with the A6 tranny anyhow, not sure about the M7.
01-12-2019, 01:34 AM
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Interesting video, Josh. Thanks.
01-12-2019, 07:55 AM
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If you have a manual trans and put the car in "Service" mode" you can bump start the car if it's on a hill. Just like the old first notch of the key.
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