Operation CHARM: Car repair manuals for everyone.
Home >> Jeep >> 2009 >> Patriot 2WD L4-2.4L >> Repair and Diagnosis >> Powertrain Management >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Technical Service Bulletins >> All Technical Service Bulletins >> Recall - PCM Replacement/Software Update >> Service Procedure >> Caution Information
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Caution Information

CAUTION:
To avoid a possible voltage spike that could damage the PCM, the ignition key must be in the "OFF" position and the negative battery able must be disconnected before unplugging the PCM connectors.
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