Known-Good Powertrain Control Module Substitution
NOTE:
Use this procedure when diagnostic testing suggests substituting PCM with known-good unit.
On models equipped with engine immobilizer system, acquire key cut from non-immobilizer key blank. Remove PCM from test vehicle. Install known-good PCM from donor vehicle into test vehicle. Tape donor vehicle's ignition key head-to-head to test vehicles temporary key. PCM will recognize code from donor vehicle's key and allow test vehicle to be started and tested.