Remote Keyless Entry (TRX) Receiver
Remote Keyless Entry (TRX) is located up by the headlining to the left of the front lighting panel. The receiver receives the signal coming from the remote control or passive key and transmits it on to Keyless vehicle module (KVM) via serial communication (ISO).
The remote keyless entry (TRX) receiver has a logic which enables it to check that a correct message is received. All communication is decrypted in the keyless vehicle module (KVM).
The remote keyless entry (TRX) receiver has two different modes:
- normal mode
- passive mode.
In normal mode, the receiver waits for a signal from the remote control when a button is pressed.
If the keyless vehicle module (KVM) receives an indication from the door handle that someone is trying to open the vehicle using keyless entry, the keyless vehicle module (KVM) transmits a signal to the receiver to switch to passive mode for a short period of time. After this time, the receiver reverts to normal mode. The difference between these two modes is the way in which the receiver communicates with the key.
When a key has been approved and is used to start the vehicle, or if there is a key in the ignition switch, the keyless vehicle module (KVM) ignores all messages from the remote keyless entry (TRX) receiver. This prevents the status of the central locking system from changing if a button on the remote control is unintentionally pressed in.
Remote Keyless Entry (TRX) is supplied with voltage directly via 30-feed and is grounded in the A-pillar.