I'd like to not disconnect the battery so I wont have to reset clock, presets, etc.

I've pull the ECM and CCM Fuse, left out over a minute. This did not work.

Thanks


[Modified by cOvette, 9:52 AM 11/6/2002]

 

The L98s have an Or wire with an in-line connector near the battery; if so equipped, open that connector for a minute or so.

 

I have the same thing on the 1986 Z28. No such luck here though.

 

Disconnect the battery....then reconnect.....should reset the ECM....least this is what I do.....is this right?????? or wrong.....it seems to work for me...


:eek: :eek:

 

Your doing it right.

 

Is there a way without dissconnecting the battery?
Resetting clock and radio presets is a pain.

 

There may be an orange lead coming off the positive cable that powers the ecm. Best way is to disconnect battery though. Why do you feel the need to do this? Your gas mileage will suck for the first 30 miles or so after a reset, while the car gets its act together again.

 

I want to do this to remove the Code 32 I got.

 

Unless your car stumbles, runs rough or shows some other negative effects of the code 32, just leave it. The computer will store it as a history code (H32). I've had it stored in mine for awhile. No performance issues have resulted. I just haven't gotten around to resetting it yet.

 

Yea, i know i can leave it, but let's say next year the SES comes on and I check the codes and get the H32 and HXX. Then I wont know if the H32 and HXX happened together or if the HXX is the only concern.

 

You don't have to pull the battery to clear codes. There is a simple procedure you can do. Reply if interested. It works on my '95 so it will work on yours. It is the preferred way to clear stored codes.

 

Oh what the heck, here's the info on how to clear codes without pulling battery, use the DIC instead. Credit where credit is due, Lou Sylvestri on the forum sent me this info:

How to View Stored Diagnostic Codes on 1994 – 1996 Corvettes

You display codes on the digital LCD speedometer readout, by using a re-shaped paper clip to short ALDL pin 4 to pin 12. Top row is numbered 1 - 8 left to right, bottom row 9 - 16 left to right.


Short pin "12" to pin "4" and turn the ignition switch to "On" without starting the engine. The speedometer will display any codes using the same protocol as the 1990-1993 model but there are some changes in the designation for the modules plus additional modules are added:

Module "1" is still the CCM module.

Module "4" is now called the PCM module (Powertrain Control Module) because automatic transmission computer control was added to Engine Control Module in 1994.

Module 7 (on the 1996 model only) is the RTD module. (This is the Real Time Dampening module which replaced the Selective Ride Control module in 1996).

Module 9 is the ABS/ASR module number from 1994 through 1996.

Finally, Module "A", the DERM (Dynamic Energy Control Module --- (the air bag control module) will be requested to show any codes. Just like the 1990-1993 display, you read the codes on the speedometer (big) and read the module number on the trip odometer (small).

A series of dashed lines for instance “ - - -“ indicates no more stored codes for that module. A code showing as “C12” for the CCM module (module #1) means no codes are stored. So C12 is a good thing to see.

Again, you can cause the codes to repeat by turning the ignition off for five seconds and then back on. Turn the ignition off and remove the short to restore normal operation.

To clear codes in the CCM proceed as follows:

1. With ignition "off" ground terminal #12 of the DLC (use bent paper clip to connect pin 4 to pin 12)

2. Turn ignition "on".

3. Press trip/odo button on the DIC until 1.7 appears in the trip
monitor area of the instrument cluster.

4. Press eng/met button on the DIC & hold until "---" appears in the
speedometer area of the cluster, this will clear CCM DTC'S.


To clear PCM/ECM codes do the following:


1. Press the trip reset button on the DIC until the desired system is displayed. In this case it will be 4.0.

2. Press trip/odo button on the DIC until the desired diagnostic mode(4.7) is displayed on the trip monitor area of the cluster.

3. Press & hold the eng/met button on the DIC until "---" is
displayed in the speedometer area of the cluster, this will clear PCM codes.


To clear ABS/ASR codes do the following:

Same as above but you’re looking for “9.7” on the trip odo

P.S. If the problem still exists the code(s) will return after engine operation




[Modified by Lone Ranger, 7:55 PM 11/13/2002]

 

Thanks Lone Ranger and L.S.!

That's what I was looking for!