Toyota Venza: Air Conditioning Unit

Back-up Power Source Circuit

DESCRIPTION The back-up power source circuit for the A/C amplifier is shown below. Power is supplied even when the ignition switch is turned off. The power is used for diagnostic trouble code mem ...

Components

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Other materials about Toyota Venza:

Key battery
Replace the battery with a new one if it is discharged.  - You will need the following items: • Flathead screwdriver (To prevent damage to the key, cover the tip of the screwdriver with rag.) • Small Phillips-head screwdriver • Lithium battery ...

Parts Location
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ECU Power Source Circuit
DESCRIPTION When the ignition switch is turned to ON, voltage from the ECM's MREL terminal is applied to the EFI MAIN relay. This causes the contacts of the EFI MAIN relay to close, which supplies power to terminal +B of the TCM. WIRING DIAGRAM PR ...