Is there anyway to more or less reboot the ECU without taking it to a dealer? I swapped in another ECU that im assuming had a chipped key. Now my jeep wont stay running because it isnt a chipped key and i get code p1686. ive tried disconnecting the battery and the head light trick. No luck.
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SKIM ISSUES
- Thread starter Spokes
- Start date
- Location
- Torrance, CA
The dealer can't "reboot" an ecu that has security enabled, only a select few people can disable the skim bit in the ecu. Also posting some information about your jeep would help.
SolarBell
NAXJA Forum User
- Location
- Wheat Ridge, CO
Without someone that has a PCM programmer, once a PCM has the SKIM enabled it is hard-saved and cannot be disabled. If a PCM sees a chip reader it turns it on and will not turn it off. This was by design from the factory so that thieves couldn't swap out PCM's to bypass the chipped keys.
Digger87xj
NAXJA Forum User
- Location
- Buffalo Creek/Lakewood CO
If you can get the skim module from the same vehicle as the PCM, you can have a new key programmed in. Even better if you can get the key too.
- Location
- Minneapolis, MN
SKIM is no big deal, and it is subject to random failures often requiring replacement and/or reprogramming of the PCM. For the cost of a SKIM module, and a some programmed chip keys, the OP can buy another good used non-SKIM enabled PCM, and be done with the whole mess.
- Location
- Torrance, CA
When SKIM gets enabled it sets a flag in the calibration as well as a flag on the EEPROM of the processor inside the PCM, none of the publically available tools, either to the dealers or PCM "remanufactures", have the access to disable SKIM in the EEPROM. That's why you see alot of "rebuilt" PCMs with SKIM enabled. Also if a thief had another ecu that was non-SKIM enabled and they were going to steal the car they could just unplug the SKIM module, drop in the new ecu and drive away.
Marcelo73
NAXJA Forum User
- Location
- Montevideo
I'm having troubles with the SKIM module, I removed the covers under the wheel. There's a bunch of cables coming from the transponder reader that if I move, the light turn off and the engine starts. After I release the cables (with the engine running) the SKIM light may turn on again (but the engines does not power off).
I think I have 2 options: try to find the trouble cable (no idea how) or replace the PCM with a new one with SKIM.
Is there any difference between PCM from XJ of differents markets? (USA vs foreign). I called some that sell rebuilt PCM (to buy one with the SKIM module) and ask me almost twice because is in a model for export.
I think I have 2 options: try to find the trouble cable (no idea how) or replace the PCM with a new one with SKIM.
Is there any difference between PCM from XJ of differents markets? (USA vs foreign). I called some that sell rebuilt PCM (to buy one with the SKIM module) and ask me almost twice because is in a model for export.
