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Back-Up Power Source Circuit
ECM Back-Up Power Source CircuitCIRCUIT DESCRIPTIONBattery positive voltage is supplied to terminal BATT of the engine ECU even when the
ignition switch is
OFF for use by the diagnostic trouble code memory, air-fuel ratio adaptive control value memory,
etc.
Wiring Diagram:
Step 1:
Step 2:
INSPECTION PROCEDURE
