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Chrysler PCM programming issues
Posted to Technical Discussion Forum on 7/9/2014 8 Replies

I've searched and searched but unable to find an answer. When programming a PCM on a Chrysler CAN vehicle WITHOUT ABS I lose the speedo. Yes I have tried to set the pinion factor or tire size in the TIPM or PCM/TCM. Using the WiTech also tried to set it from the module view screen under vehicle prep. Two vehicles were '06 PT Cruisers and the latest an '08 charger. I am aware of setting the tire size incorrectly and then back to what it calls for. I have tried restore vehicle configuration and resetting modules. I have looked for any hidden means to get this done with the WiTech (including overwriting modules with the same calibration). I have reinstalled the old PCMs and WHA LA speedo comes back... Sent one PT Cruiser to the dealer. They had it a week. Said they had needed a custom CVN from Detroit. Speedo now working. That was a couple months ago. Now I'm thinking this '08 Charger will also have to go to the dealer. Has anybody else run into this. Are there procedures I'm missing?

Pete Petrokas
Professional Automotive Diagnostics
Gilbert, Arizona, USA

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