Toyota CH-R Service Manual: System Description

Electrical key transmitter sub-assembly

Electrical key and TPMS receiver assembly

Receives weak radio waves from the electrical key transmitter sub-assembly and sends them to the certification ECU (smart key ECU assembly).

Certification ECU (Smart key ECU assembly)

Sends wireless door lock control signals in response to the code data from the electrical key and TPMS receiver assembly and signals from each ECU.

All door lock

Pressing the lock switch locks all of the doors.

All door unlock

Pressing the unlock switch unlocks all of the doors.

All door unlock

(Unlock 2 operation)

Pressing the unlock switch twice within 5 seconds unlocks all of the doors after the driver door is unlocked.

Automatic lock

If none of the doors is opened within 60 seconds after they are unlocked by the wireless door lock control, all of the doors will lock again automatically.

Answer-back (Hazard warning light)

Answer-back (Wireless door lock buzzer) *1

Panic alarm*1

Pressing the panic switch of the electrical key transmitter sub-assembly for longer than about 0.8 seconds causes the following alarms to activate:

While the panic alarm is operating, pressing any switch of the electrical key transmitter sub-assembly cancels the alarm operation.

Wireless reservation lock.*1, *2

Pressing the lock button of the electrical key transmitter sub-assembly while the door is open causes the door to lock when it is closed.

Door ajar warning*2

The buzzer sounds for 5 seconds continuously when the lock switch is pressed when any of the doors are ajar. The buzzer stops when all of the doors are closed or the unlock switch is pressed.

Illuminated entry

When all of the doors are locked, pressing the unlock switch causes the interior lights to come on simultaneously with the unlock operation.

Self-diagnostic mode

If the electrical key and TPMS receiver assembly receives normal radio waves from the electrical key transmitter sub-assembly when the system is in diagnostic mode, it sounds the wireless door lock buzzer in a normal pattern that corresponds to the function of each switch.