Keyless Entry System Circuit Description. Chevrolet PJJ 2000

For 1990-2009 cars

The keyless entry system is a supplementary vehicle entry device.

Keyless entry allows you to operate the following components:

• | The door locks.

• | The trunk release

The keyless entry system has the following main components:

• | The transmitters

• | The remote control door lock receiver (Omron module)

When you press a button on a transmitter, the transmitter sends a signal to the remote control door lock receiver (Omron module). The remote control door lock receiver (Omron module) interprets the signal and requests the body control module to perform any of the following operations:

• | Unlock all of the doors.

• | Unlock all of the doors and open the trunk.

• | Lock all of the doors.

### Unlock All Doors

When the unlock button of the transmitter is pressed momentarily the remote control door lock receiver (Omron module) sends a door unlock request to the body control module (BCM) via the keyless entry unlock/trunk release request circuit. The BCM applies B+ to the door lock/unlock relay. The door unlock relay applies B+ to all of the door lock actuators. Ground is applied to the actuators through the door lock relay, and all of the doors unlock.

### Unlock All Doors and Open Trunk

When the unlock button of the transmitter is pressed and held for approximately 3 seconds all of the doors unlock as described above. The body control module (BCM) also applies B+ to the trunk release actuator through the trunk release actuator input circuit. The trunk release actuator is grounded through the actuator case, and the trunk opens.

### Lock All Doors

When the lock button of the transmitter is pressed momentarily the remote control door lock receiver (Omron module) sends a door lock request to the body control module (BCM) via the keyless entry lock request circuit. The BCM applies B+ to the door lock/unlock relay. The door lock relay applies B+ to all of the door lock actuators. Ground is applied to the actuators through the door unlock relay, and all of the doors lock.