Schematic Reference: Theft Deterrent System Schematics

Connector End View Reference: Theft Deterrent System Connector End Views

DEFINITION: The CTD system does not disarm when the vehicle is unlocked with the key.

1

Did you perform the Theft Deterrent Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

1. Turn ON the ignition.
2. With a scan tool, observe the door key switch parameter in the BCM data list.
3. Insert the ignition key into the drivers door key cylinder.
4. Turn and hold the door key cylinder to the UNLOCK position.
5. Repeat the procedure for the passenger door lock cylinder.

Does the scan tool display ACTIVE when the key cylinders are held in the UNLOCK position?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

Does the scan tool display INACTIVE when both the left door key cylinder and the right door key cylinder are held in the UNLOCK position?

Go to Step 4

Go to Step 6

Test the BCM portion of the door key switch signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 5

Inspect for a poor connection at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Was a condition found and corrected?

Go to Step 12

Go to Step 11

1. Disconnect the one inoperative door key cylinder switch.
2. Connect a 3 amp fused jumper wire between the door key switch signal circuit of the inoperative door key cylinder switch and a good ground.
3. Observe the door key switch parameter on the scan tool.

Does the scan tool display ACTIVE?

Go to Step 8

Go to Step 7

Repair the open in the appropriate door key switch portion of the door key switch signal circuit.

Did you complete the repair?

Go to Step 12

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1. Connect a 3 amp fused jumper wire between the door key switch signal circuit and the ground circuit.
2. Observe door key switch parameter on the scan tool.

Does the scan tool display ACTIVE?

Go to Step 10

Go to Step 9

Repair the open in the ground circuit of the inoperative door key switch.

Did you complete the repair?

Go to Step 12

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Replace the inoperative door key switch. Refer to Door Lock Cylinder Replacement in Doors.

Did you complete the replacement?

Go to Step 12

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Important: When replacing the BCM, perform the relearn procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 12

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1. Reconnect any connectors that were removed for testing.
2. Clear any DTCs that may have been set during this procedure.
3. Attempt to arm the CTD system.
4. Simulate an intrusion.

Did you correct the condition?

System OK

Go to Diagnostic System Check - Theft Deterrent