1990 C4 Odometer Issue
Thread Starter
Cruising
Joined: Nov 2014
Posts: 10
Likes: 0
1990 C4 Odometer Issue
Hello. I'm new to the Forum, looks like a great place to share and learn about Vettes. I have a 1990 C4 that was purchased in September with 77,100 miles. It had some headlight and electronics issues. The headlight module was replaced along with the body control module. After these repairs I was switching the odometer from trip mode to miles mode and to my surprise the odometer was reading
236,000 miles. Any ideas as to what may have happened to the odometer? Thanks!
236,000 miles. Any ideas as to what may have happened to the odometer? Thanks!
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 42
From: Baltimore, MD USA
They replaced your CCM with a used one. When you replace the CCM with a refurbished one, you use a Tech 1 to program the original mileage and some other parameters. You have 100 miles to do this. After 100 miles none of the parameters can be modified.
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Last edited by Hooked on Vettes; Nov 19, 2014 at 04:01 PM.
Thread Starter
Cruising
Joined: Nov 2014
Posts: 10
Likes: 0
C4 Odometer Issue
Hello, Thanks for your reply. But it sounds like I'm screwed, I've driven the car a couple hundred miles since the work was done.
The odometer reading is stored in the CCM.
They replaced your CCM with a used one. When you replace the CCM with a refurbished one, you use a Tech 1 to program the original mileage and some other parameters. You have 100 miles to do this. After 100 miles none of the parameters can be modified.
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They replaced your CCM with a used one. When you replace the CCM with a refurbished one, you use a Tech 1 to program the original mileage and some other parameters. You have 100 miles to do this. After 100 miles none of the parameters can be modified.
-
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 42
From: Baltimore, MD USA
If you can get your original CCM back, send it out for repair and your original mileage should still be intact.
