Scheme 44
Symptoms - Theft Deterrent
Note. The following steps must be completed before using the symptom tables.
- Perform «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
- Review the system operation in order to familiarize yourself with the system functions. Refer to the following «Theft Systems Description and Operation»(/buick/enclave/i-2007-2013/remont/door-locks-anti-theft-systems/#theft-deterrent-system__theft-systems-description-and-operation) .
Visual/Physical Inspection
- Inspect for aftermarket devices which could affect the operation of the Theft Deterrent System. Refer to «Checking Aftermarket Accessories»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
- Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom
- «Content Theft Deterrent Malfunction»(/buick/enclave/i-2007-2013/remont/door-locks-anti-theft-systems/#theft-deterrent-system)
- «Security Indicator Malfunction»(/buick/enclave/i-2007-2013/remont/door-locks-anti-theft-systems/#theft-deterrent-system)
Diagnostic Instructions
- Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
- Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
- «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
Circuit/System Description
The content theft deterrent (CTD) system is a software based system in which the body control module (BCM) actively monitors certain inputs to determine if unauthorized vehicle access is being attempted. Based on inputs such as the door ajar switches, the rear compartment ajar switch, and the hood ajar switch, the BCM determines whether a CTD alarm is warranted. If unauthorized access is being detected, the BCM will pulse the vehicle horn and flash the turn signals as a means of theft deterrence.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Electrical Information Reference
- «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
- «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
- «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
- «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Individually open and close each vehicle door while observing the door ajar indicator/message. The indicator/message should accurately transition between the door ajar and door closed state when each door is opened and closed. If the door ajar indicator/message does not properly transition when each door is opened and closed, refer to «Door Ajar Indicator Malfunction (With RPO AXC/AXE)»(/buick/enclave/i-2007-2013/remont/door-locks-anti-theft-systems/#power-door-lock-system-and-release-systems) , «Door Ajar Indicator Malfunction (Without RPO AXC/AXE)»(/buick/enclave/i-2007-2013/remont/door-locks-anti-theft-systems/#power-door-lock-system-and-release-systems) .
- Open and close the liftgate while observing the liftgate ajar indicator/message. The indicator/message should accurately transition between the liftagte ajar and liftgate closed state when the trunk is opened and closed. If the liftgate ajar indicator/message does not properly transition when the liftgate is opened and closed, refer to «Liftgate Ajar Indicator Malfunction (Manual Liftgate)»(/buick/enclave/i-2007-2013/remont/door-locks-anti-theft-systems/#power-door-lock-system-and-release-systems) , «Liftgate Ajar Indicator Malfunction (Power Liftgate)»(/buick/enclave/i-2007-2013/remont/door-locks-anti-theft-systems/#power-door-lock-system-and-release-systems) .
- Completely lower the driver door window and close all vehicle doors.
- Ignition OFF, arm the CTD system using the keyless entry system by pressing the transmitter LOCK button twice. Verify the scan tool CTD Status parameter displays Armed. If not the specified value, refer to «Remote Control Door Lock Transmitter Learn»(/buick/enclave/i-2007-2013/remont/door-locks-anti-theft-systems/#keyless-entry-system-and-remote-functions) .
- Without disarming the system, reach in through the open driver window, unlock and open the driver door. Verify the scan tool CTD Status parameter displays Alarm Active. If not the specified value, replace the BCM.
- With the door open, verify the vehicle horn is pulsing and the exterior lamps are flashing. If the horn is not pulsing, refer to «Horns Malfunction»(/buick/enclave/i-2007-2013/remont/horns/#horn-system) . If the exterior lights are not flashing, refer to «Turn Signal Lamps and/or Indicators Malfunction»(/buick/enclave/i-2007-2013/remont/exterior-lights/#lighting-system) .
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for BCM replacement, setup, and programming
- Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
- Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
- «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provide an overview of each diagnostic category.
The security indicator acts as a status indicator for the content theft deterrent (CTD) system when the ignition is OFF and as a fault indicator for the immobilizer system when the ignition is ON. When either the body control module (BCM) or theft deterrent module (TDM) requires the security indicator to be illuminated, a serial data message is sent to the instrument panel cluster (IPC), which will illuminate the indicator.
Schematic Reference
Connector End View Reference
Description and Operation
Electrical Information Reference
- «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
- «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
- «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
- «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
Scan Tool Reference
Control Module References for scan tool information
Ignition ON, verify the security indicator illuminates when performing the scan tool IPC Display Test.
- If the security indicator does not illuminate, replace the IPC.
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for IPC replacement, setup, and programming
Theft Systems Description and Operation
When armed, the content theft deterrent (CTD) system is designed to deter vehicle content theft by pulsing the horns and exterior lamps for approximately 30 seconds when an unauthorized vehicle entry is detected. However, the CTD system does not affect engine starting.
An unauthorized entry can be any of the following with the CTD system armed
- When any door is opened without first being unlocked using the keyless entry transmitter
- After a battery reconnect, if the battery was disconnected with the CTD system armed
The components of the CTD system are
- Body Control Module (BCM)
- Security indicator
- Door ajar switches
- Liftgate ajar switch
Arming the CTD System
Use the following procedure in order to arm the system
- Place the shift lever in P (park).
- Turn OFF the ignition.
- Open any door.
- Lock the doors with the LOCK button on the transmitter. The system is in standby mode and will not start the arming timer until all doors are closed.
- The system will begin the arm sequence immediately after the last door is closed. If the keyless entry transmitter is used to arm the system after the vehicle doors are closed, the arm sequence will begin as soon as the LOCK command is received from the transmitter.
Locking the Vehicle Without Arming the CTD System
Locking the vehicle may be accomplished without arming the content theft deterrent (CTD) system. Use of the manual door locks or using the key to lock the doors will lock the vehicle, but will not arm the CTD system.
Disarming an Armed System/Silencing an Alarm
If system arming has been requested by the power door lock switch or the keyless entry transmitter, it must be disarmed.
| IMPORTANT | Using the power door unlock switch or manually unlocking the doors does not disable the content theft deterrent (CTD) arm mode. Also, disconnecting the battery or pulling fuses does not disable the arm mode, since the BCM stores the CTD mode status in memory. |
- To disarm the CTD system in standby mode, perform one of the following: Press the UNLOCK button on the keyless entry transmitter. Insert a valid key into the ignition and switch to the ON position.
- To disarm the CTD system in the armed mode (non-event) or when activated (during an alarm event): Press the UNLOCK button on the keyless entry transmitter. Insert a valid key into the ignition and switch to the ON position
CTD Circuit Description
The following is a description of each component used in the content theft deterrent (CTD) system
Body Control Module (BCM)
The CTD system is an internal function of the BCM which utilizes serial data and various switch inputs information to perform CTD functions. When the BCM detects an unauthorized entry, it activates the horns and exterior lamps. The BCM has 4 basic modes (disarmed, standby, armed, and alarm) for operating the CTD system. The different modes are described below.
- The BCM has the CTD system in a disarmed mode until the following conditions are detected: Ignition key turned to the OFF position. Doors locked by either the power door lock switch or the LOCK button on the transmitter.
- The BCM enters the standby mode when the above conditions are detected. If a door was already opened when the arm mode was requested, the standby mode does not start the timer until the last door is closed.
- When the last door is closed, a 15 second timer is activated. Once the timer has expired, the BCM enters the armed mode. After this delay, any forced entry activates the alarm mode.
- When the BCM detects a forced entry, the BCM enters the alarm mode. The BCM activates the horns and exterior lamps for 30 seconds. This is followed by a three minute time-out with the horn no longer active. If no new intrusions are detected after the time-out, the horn is not active. The system must be disarmed or the intrusion condition removed after the time-out for the system to exit alarm mode.
Security Indicator
The security indicator is illuminated on the instrument panel cluster (IPC) by the BCM for CTD or the immobilizer system. The CTD system uses the security indicator to inform the driver of system status prior to arming. The security indicator on the instrument cluster is controlled by both the CTD system and the immobilizer system.
- The CTD system, integral to the BCM, commands the IPC to control the security indicator only when the ignition switch is OFF. The CTD system uses the indicator to identify system status.
- The immobilizer system commands the IPC to control the security indicator only when the ignition switch is ON as a malfunction indicator. The immobilizer system is to deter vehicle theft. Refer to «Immobilizer Description and Operation»(/buick/enclave/i-2007-2013/remont/door-locks-anti-theft-systems/#immobilizer-system__immobilizer-description-and-operation) for more information on the immobilizer system.
Liftgate Ajar Switch
The CTD system uses the liftgate ajar switch as a status indicator to activate the alarm. The liftgate ajar switch is monitored by the BCM via a discrete input. If the BCM receives a signal indicating a liftgate is opened when the CTD system is armed, the BCM activates the alarm.
Door Ajar Switches
The CTD system uses the door ajar switches as a status indicator to activate the alarm. The door ajar switches are monitored by the BCM via a discrete input from each door ajar switch. If the BCM receives a signal indicating a door is opened when the CTD system is armed, the BCM activates the alarm.
Inputs
The BCM monitors the following inputs for CTD
- The door ajar switches
- The liftgate ajar switch
- The keyless entry transmitter LOCK/UNLOCK buttons
- The immobilizer status-The BCM uses the immobilizer status for disarming the system or silencing an alarm when the correct vehicle key is used to start the vehicle
Outputs
The BCM controls the following for CTD
- The horn relay
- The exterior lamps
See also:
• Diagnostic System Check - Vehicle
• Checking Aftermarket Accessories
• Testing for Intermittent Conditions and Poor Connections
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• COMPONENT CONNECTOR END VIEWS - INDEX
• Circuit Testing
• Connector Repairs
• Wiring Repairs
• Control Module References
• Door Ajar Indicator Malfunction (With RPO AXC/AXE)
• Remote Control Door Lock Transmitter Learn
• Horns Malfunction
• Turn Signal Lamps and/or Indicators Malfunction
• Diagnostic Repair Verification
• Immobilizer Description and Operation
• Theft Systems Description and Operation
• Content Theft Deterrent Malfunction