Starting System: Description and Operation

1NZ-FXE STARTING: SMART KEY SYSTEM:

SYSTEM DIAGRAM









SYSTEM DESCRIPTION

1. SMART KEY SYSTEM DESCRIPTION
(a) The smart key system uses a push-type power switch, which the driver operates by inserting a key into the key slot or by merely carrying the key*. This system consists of a power source control ECU, power switch, key slot, key, ACC relay, IG1 relay, IG2 relay and transponder key ECU. The power source control ECU controls the system. This system operates in conjunction with the engine immobiliser system and the smart key system*.
The table below shows the transition of the power switch, which depends on whether the brake pedal is depressed or released.
HINT: *: w/ Smart key system (for door lock)





2. FUNCTION OF COMPONENT





HINT: *: w/ Smart key system (for door lock)

3. SYSTEM FUNCTION
The electric controls of the smart key system are described below:






4. POWER SWITCH CONTROL (WITH KEY)

- When a key is inserted into the key slot and the transponder key ECU recognizes the ID code of the key, the power source control ECU authorizes operation of the power switch.
- A power mode (OFF, ON (ACC) and ON (IG)) can be selected by pressing the power switch. Press, release and press the power switch until the desired power mode is selected (the power mode cycle in the order shown above). If the driver pushes the power switch while depressing the brake pedal (the stop light switch turns ON), the power mode will change to ON (READY) regardless of the previous power mode.
- After approximately 1 hour has passed with the power switch ON (ACC) and the shift position in P, the power source control ECU will automatically turns OFF the power (the power mode changes to OFF).
- The illustration below shows the transition of power modes.




HINT: While the vehicle is being driven normally, operation of the power switch is disabled. However, if the hybrid control system must be stopped in an emergency while the vehicle is being driven, pressing the power switch for at least 3 seconds can stop the hybrid control system. Power mode changes from ON (READY) to ON (ACC).

5. DIAGNOSIS
If a malfunction occurs in the IG circuit, the power source control ECU will perform the controls listed in the table below and record a DTC.