Clearing NV RAM
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Clearing NV RAM
There is a new service bulletin for clearing the eccentric shaft position sensor data.
This data is stored in a seperate area of the ECU called "non-volitile RAM". NV RAM is not cleared with a simple CEL code clear or a battery disconnect.
Since the repair procedure for reseting the eccentric shaft sensor is to clear NV RAM.......My question is what else is stored in NV RAM? What affects will this have on the relearn mode?...Especially on Canzoomer"s Stage 1 already installed.
When you get a CEL and then "reset" it by a battery disconnect........it only really resets the light on the dash display. The code is still stored which can only be reset with a CAN protocol scan tool. With NV RAM however, the clear procedure is just tapping the brake pedal 20 times with the ignition in the "on" position, engine off.
This data is stored in a seperate area of the ECU called "non-volitile RAM". NV RAM is not cleared with a simple CEL code clear or a battery disconnect.
Since the repair procedure for reseting the eccentric shaft sensor is to clear NV RAM.......My question is what else is stored in NV RAM? What affects will this have on the relearn mode?...Especially on Canzoomer"s Stage 1 already installed.
When you get a CEL and then "reset" it by a battery disconnect........it only really resets the light on the dash display. The code is still stored which can only be reset with a CAN protocol scan tool. With NV RAM however, the clear procedure is just tapping the brake pedal 20 times with the ignition in the "on" position, engine off.
Last edited by Gyro; 02-13-2004 at 09:48 AM.
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Originally posted by mikeb
so should I complete this task ASAP
with the brakes pedal
so should I complete this task ASAP
with the brakes pedal
This bulletin is for when major work has been done to the engine (including total replacement) and the actual eccentric shaft position doesnt match what the computer thinks it should be. This sets of "misfire" codes. So a dump of all the data in NV RAM will solve this particular issue.
What I was wondering was what other data is lost and reobtained after this procedure is done.
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Re: Clearing NV RAM
Originally posted by Gyro
With NV RAM however, the clear procedure is just tapping the brake pedal 20 times with the ignition in the "on" position, engine off.
With NV RAM however, the clear procedure is just tapping the brake pedal 20 times with the ignition in the "on" position, engine off.
I think you have to push it 20 times in 8 seconds. That was the bulletin I read. I watched the tech do it on my car when they replaced my engine.
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