Operation CHARM: Car repair manuals for everyone.
Home >> Saturn >> 2000 >> LW1 L4-2.2L VIN F >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Description and Operation >> System Descriptions >> Powertrain Control Module >> PCM Power-Down Routine
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

PCM Power-Down Routine

After ignition has been turned Off, PCM updates records such as malfunction history and adaptives prior to powering down. If PCM is commanding coolant fan On as a result of elevated coolant temperature, this routine will wait until timed fan run-on is completed (approximately 2 minutes). The actual power-down routine will complete within 10 seconds. If PCM is being reprogrammed (flashed), PCM will stay alive until reprogramming is complete.
pro multis · About Operation CHARM