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
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Back Up Power Source Circuit
CIRCUIT DESCRIPTION Battery voltage is supplied to terminal BATT of the ECM even when the ignition switch is OFF for use by the diagnostic trouble code memory and air-fuel ratio adaptive control value memory, etc.
HINT: If DTC P1600 appears, the ECM is not able to store another diagnostic trouble code.
ECM Back-up Power Supply Circuit:
WIRING DIAGRAMINSPECTION PROCEDURE
