Jeep Grand Cherokee
Jeep Grand Cherokee Laredo
Jeep Grand Cherokee Limited

What can cause the pcm to crash when reprogramming flashing a Jeep Grand Cherokee 1999 with jeep oem flashing tool?

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Answer

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Wiki User
10/19/2011

There are a lot of things that will cause this.

1. Low battery voltage.

2. Flash tool has internal failure /issue

3. Poor connections from flash tool

4. Trying to flash the PCM with the wrong update