Diesel Data: Automotive Repair

Electronic Key



Electronic Key
The 2004 Prius introduces a new electronic key as standard equipment.




Electronic key features:
- Wireless transmitter to lock/unlock the doors.
- Electronic key for starting.
- Hidden metal cut key to lock/unlock the doors from the driver exterior door lock.

Door (Lock/Unlock)
Two methods are available to lock/unlock the doors.

1. Pushing wireless electronic key lock/unlock buttons.

2. Inserting the hidden metal cut key in driver door lock and turning clockwise once unlocks the driver door, twice unlocks all doors. To lock all doors turn the key counter-clockwise once. Only the driver door contains an exterior door lock.

Vehicle Starting/Stopping



The electronic key has replaced the conventional metal cut key, and an electronic key slot and power button have replaced the ignition switch.

- A standard electronic key as shown in the illustration is inserted into the electronic key slot.

- The electronic key slot does not rotate like a conventional ignition switch. Instead, a power button with an integral status indicator light is provided above the electronic key slot to cycle through the various ignition modes. With the brake pedal released, the first push of the power button operates the accessory mode, the second push operates the ignition-on mode, and the third push turns the ignition off again.

Ignition Mode Sequence (Brake pedal released):







Vehicle Starting/Stopping



- Starting the vehicle takes priority over all other ignition modes and is accomplished by depressing the brake pedal and pushing the power button once. To verify the vehicle has started, the power button status indicator light is off and the READY light is illuminated in the instrument cluster.

- Once the vehicle has started and is on and operational (READY-on), the vehicle is shut off by bringing the vehicle to a complete stop and then depressing the power button once.

- The key slot prevents the electronic key from being removed while the vehicle is on and operational (READY-on) or in the ignition-on mode.