Toyota Tundra Service Manual: System Diagram

System Description

Terminals Of Ecu

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Toyota Tundra Service Manual > Sfi System: System Voltage (P0560)
DESCRIPTION The battery supplies electricity to the ECM even when the ignition switch is off. This power allows the ECM to store data such as DTC history, freeze frame data and fuel trim values. If the battery voltage falls below a minimum level, the memory is cleared and the ECM determines that the ...