For 1990-2009 cars

### Door Lock Actuator

The CTD system uses the inputs of the front and rear door lock actuator switches in order to activate the alarm. The RFA module detects a ground at terminal E10 (CKT 727, DK BLU/WHT) under the following conditions:

1. When the CTD system is armed and
2. The left front door is open. (The left front door lock actuator closes).

The RFA module detects a ground at terminal E10 (CKT 727, BLU/WHT). If the front or rear doors are open. When the RFA module detects a ground condition at either terminal, the CTD system enters the alarm mode.

### Door Lock Cylinder Switch

The front door lock cylinders are equipped with switches. The switches are used to disarm the CTD system. When you turn the lock cylinder in order to unlock the door, the following actions occur:

• | The door lock cylinder switch closes.

• | The RFA module detects a ground at terminal E11 (CKT 262, LT GRN).

When the RFA detects a ground condition at terminal E11, the CTD system is armed and the system enters delayed mode.

### Door Tamper Switch (Buick)

The door tamper switches connect to the front door lock cylinders. If a forced entry causes a front door lock cylinder to move in and out, the following actions occur:

• | The attached door tamper switch closes.

• | The RFA module detects a ground at terminal F10 (CKT 263, LT BLU).

• | The CTD system enters alarm mode.

### Rear Compartment Lid Tamper Switch

The rear compartment lid tamper switch connects to the rear compartment lid lock cylinder. If the lock cylinder rotates or moves in and out, the following actions occur:

• | The rear compartment lid tamper switch closes.

• | The RFA module detects a ground at terminal F10 (CKT 263, LT BLU). When the RFA module detects a ground condition at terminal F10, the CTD system enters the alarm mode.

### Remote Function Actuator (RFA) Module

The remote function actuator (RFA module contains the software in order to do the following tasks for the CTD system:

• | Monitor the inputs

• | Control the outputs

The RFA module has the following inputs:

• | The left front door lock actuator (CKT 727, DK BLU/WHT)

• | The right front door lock actuator (CKT 49, DK BLU)

• | The door lock cylinder switches (CKT 262, LT GRN)

• | The rear compartment lid tamper switch (CKT 263, LT BLU/BLK)

The RFA module has the following outputs:

• | The horn relay control (CKT 28, BLK)

• | The exterior lights control enable (CKT 624, BLK/WHT)

• | The SECURITY indicator (CKT 264, DK GRN)