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Old 01-07-2021, 01:00 AM   #12
J!m's Avatar
Join Date: Jun 2003
Location: Bouncing off the rev limiter in CT!
Posts: 3,046
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I wasn’t totally clear in my response-

If you put a cluster in, with its original chip, it will display cluster mileage and not light the TMU. Change the chip in the same cluster, and the light will come on.

Put another unmolested cluster in and the light will go out (and mileage of THAT cluster will be displayed).

It seems to me the TMU only goes on when the cluster itself has been tampered with. I guess they didn’t figure you’d put in another complete cluster from a lower mileage car.
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