Operation CHARM: Car repair manuals for everyone.
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
If it fails: lemon-manuals.org.ua

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"E" Cell

OPERATION
Controls voltage at ECM terminal 15 providing a different control value for some systems during the break-in period.
- For the first 25,000 miles of vehicle operation the voltage at ECM terminal 15 is nearly zero.
- After the first 25,000 miles of vehicle operation the "E" cell raises the voltage at ECM terminal 15 to near 5 volts.