Theft Deterrent System Cadillac STS I

Fastener Tightening Specifications

Fastener Tightening Specifications

Scheme 48

Scheme 49

Scheme 50

Scheme 51

Scheme 52

Hood Ajar Switch Connector End Connector Part Information OEM: 15326808 Service: 15306388 3-Way F GT 150 Series Sealed 4.5 (BK) Terminal Part Information Terminal: Terminal Seal: Release Tool: Core Crimp: Insulation Crimp: Test Probe: Pin Wire Color Circuit No. Function A YE 5530 Hood Open Switch Signal B PU 5531 Hood Closed Switch Signal C BK 250 Ground

Inclination Sensor Connector End (w/UA2) Connector Part Information OEM: 15324229 Service: 4-Way F Timer Micro 1 (BK) Terminal Part Information Terminal: Terminal Seal: Release Tool: Core Crimp: Insulation Crimp: Test Probe: Pin Wire Color Circuit No. Function 1 RD/WH 3940 Battery Positive Voltage 2 - - Not Used 3 GY 112 Inclination Sensor Signal 4 YE 5058 Intrusion Sensor Armed Signal

Intrusion Sensor Connector End (w/UA2) Connector Part Information OEM: 15326747 Service: 3-Way F Micro-Pack 64 (BK) Terminal Part Information Terminal: Terminal Seal: Release Tool: Core Crimp: Insulation Crimp: Test Probe: Pin Wire Color Circuit No. Function A RD/WH 3940 Battery Positive Voltage B PU 5059 Intrusion Sensor Alarm on Signal C YE 5058 Intrusion Sensor Armed Signal

Theft Deterrent Alarm Siren Connector End (w/UA2) Connector Part Information OEM: 1-967640-1 Service: 4-Way F Amp (BK) Terminal Part Information Terminal: Terminal Seal: Release Tool: Core Crimp: Insulation Crimp: Test Probe: Pin Wire Color Circuit No. Function 1 PK 1339 Run/Crank Ignition 1 Voltage 2 OG 3940 Fuse Output Battery Type 3 Fuse 3 TN/BK 5168 Power Sounder Enable Signal 4 BK 1050 Ground

Scan Tool Output Controls

Rear Integration Module (RIM) Output Controls

Scan Tool Data List

DDM Data List

ECM Data List

IPM Data List

LRDM Data List

PDM Data List

RCDLR Data List

RIM Data List

RRDM Data List

Circuit Description

After a loss of battery power has been restored the theft deterrent control module will perform a check on the stored vehicle identification number (VIN). If the VIN is CORRECT, the remote control door lock receiver (RCDLR) will run the VIN Timer for a programmable length of time, typically 10 minutes. The RCDLR will send a message via the serial data circuit to the instrument panel cluster (IPC) to illuminate the SECURITY indicator. After the VIN Timer has timed out, the security indicator will turn OFF. If the VIN is INCORRECT, the RCDLR will send the fuel disable password to the engine control module (ECM) via the serial data circuit. The vehicle theft deterrent (VTD) system considers this to be a tamper and will not allow the vehicle to start. The RCDLR will send a message via the serial data circuit to the IPC to flash the SECURITY indicator.

Substitution detection is based on 5 correct responses from the following modules

1. IPC
2. Rear integration module (RIM)
3. Driver door module (DDM)
4. Front passenger door module (FPDM)
5. Left rear door module (LRDM)
6. Right rear door module (RRDM)
7. Driver position module (DPM)

The modules compare their VIN to that stored in the VIN master on every ignition ON cycle and report their status to the RCDLR. The RCDLR will only check the modules status to see the 5 correct matches when a battery reconnect has been recognized within the theft deterrent module.

DTC Descriptor

This diagnostic procedure supports the following DTC

DTC B0996 Vehicle Electronic Control Unit (ECU) VIN Check Error

This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to in Vehicle DTC Information.

DTC B0996

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

1. The VIN check flag of the theft deterrent control module is true.
2. The RCDLR has determined that the battery has been reconnected after a disconnect.

Action Taken When the DTC Sets

1. The vehicle will not start.
2. The RCDLR sends the fuel disable message via the serial data circuit to the ECM.
3. The RCDLR will run the VIN Timer for a programmable length of time, typically 10 minutes.
4. The RCDLR sends a message to the IPC to illuminate the SECURITY indicator.

Conditions for Clearing the MIL/DTC

1. The RCDLR clears the current DTC when the correct VIN information is present.
2. The DTC can be cleared by using a scan tool.

Diagnostic Aids

The VIN information is stored during the Setup New RCDLR procedure on a GM SPO replacement part. When the manufacturers enable counter (MEC) is equal to 0 the VIN information cannot be changed. DTC B0996 will set the when the RCDLR does not receive the required 5 correct VIN responses from the modules which report to the theft deterrent module.

Test Description

The number below refers to the step number on the diagnostic table

1. 4: The RCDLR compares the stored VIN of 7 modules to that of the dash integration module (DIM). If any 2 of the 7 modules is mismatched to the VIN stored in the DIM, DTC B0996 will set.

DTC B0996

After a loss of battery power has been restored the remote control door lock receiver (RCDLR) will perform a check on the stored vehicle identification number (VIN). If the VIN is CORRECT, the RCDLR will run the VIN Timer for a programmable length of time, typically 10 minutes. The RCDLR will send a message via the serial data circuit to the instrument panel cluster (IPC) to illuminate the SECURITY indicator. After the VIN Timer has timed out, the security indicator will turn OFF. If the VIN is INCORRECT, the RCDLR will send the fuel disable password to the engine control module (ECM) via the serial data circuit. The vehicle theft deterrent (VTD) system considers this to be a tamper and will not allow the vehicle to start. The RCDLR will send a message via the serial data circuit to the IPC to flash the SECURITY indicator.

Substitution detection is based on 5 correct responses from the following modules

1. Instrument panel cluster (IPC)
2. Rear integration module (RIM)
3. Driver door module (DDM)
4. Front passenger door module (FPDM)
5. Left rear door module (LRDM)
6. Right rear door module (RRDM)
7. Driver position module (DPM)

The modules compare their VIN to that stored in the VIN master on every ignition ON cycle and report their status to the RCDLR. The RCDLR will only check the modules status to see the 5 correct matches when a battery reconnect has been recognized within the RCDLR.

This diagnostic procedure supports the following DTC

DTC B1015 Vehicle Information Number (VIN) Information Error

This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to in Vehicle DTC Information.

DTC B1015

The ignition is ON.

1. The VIN check flag of the theft deterrent control module is true.
2. The RCDLR has determined that the battery has been reconnected after a disconnect.

1. The vehicle will not start.
2. The RCDLR sends the fuel disable message via the serial data circuit to the ECM.
3. The RCDLR will run the VIN Timer for a programmable length of time, typically 10 minutes.
4. The RCDLR sends a message to the IPC to illuminate the SECURITY indicator.

1. The RCDLR clears the current DTC when the correct VIN information is present.
2. The DTC can be cleared by using a scan tool.

The VIN information is stored during the Setup New RCDLR Module procedure on a GM SPO replacement part. When the manufacturers enable counter (MEC) is equal to 0 the VIN information cannot be changed. DTC B1015 will set when both the remote control door modules RCDLR stored VIN and the stored VIN of those modules which report to the RCDLR does not equal the VIN stored in the instrument panel module (IPM). This situation may occur if the VIN was programmed incorrectly to the IPM. Other instances of DTC B1015 would be the RCDLR and any of the modules reporting their status to the RCDLR not being properly set up.

The numbers below refer to the step numbers on the diagnostic table

1. 2: The IPM is the vehicle VIN master. If the programmed VIN in the IPM is different than that of the actual vehicle VIN, DTC B1015 will be set and all the substitution flags will read YES.
2. 4: The RCDLR compares the stored VIN of 7 modules as well as its own stored VIN to that of the IPM. If the RCDLR and any other of the 7 modules is mismatched to the VIN stored in the IPM, DTC B1015 will set.

DTC B1015

When the content theft deterrent (CTD) system arms, and the inclination sensor is enabled, the rear integration module (RIM) receives a power-up acknowledgment from the inclination sensor via the inclination sensor enable circuit.

This diagnostic procedure supports the following DTC

DTC B2923 Content Theft System Inclination Sensor Signal Circuit

This vehicle has DTCs which include DTC symptoms. For more information on DTC symptoms, refer to DTC Symptom Description in Vehicle DTC Information.

DTC B2923

1. The inclination sensor is enabled.
2. The CTD system has armed.

The RIM does not receive the power-up acknowledgment from the inclination sensor.

The RIM will ignore all inputs from the inclination sensor for the remainder of the CTD system arming cycle.

DTC B2923 will be cleared if any of the following occur

1. The RIM receives a power-up acknowledgment from the inclination sensor during the next CTD system arming cycle, and the inclination sensor is enabled.
2. You use the scan tool to clear DTCs.

DTC B2923

The rear integration module (RIM) monitors the voltage input of the hood open switch signal circuit and the hood open closed switch signal circuit. During proper operation, the 2 separate voltage signals at the RIM should never be the same voltage with the hood opened or closed. If the 2 voltage signal should have the same voltage value DTC B3006 will set.

This diagnostic procedure supports the following DTC

DTC B3006 Hood Ajar Circuit.

This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to in Vehicle DTC Information.

DTC B3006

This DTC shall run when the Run/Crank Relay is enabled.

If both the hood open switch signal circuit and the hood closed switch signal circuit are simultaneously in a high or low voltage state.

1. Remote start functions will be disabled.
2. The hood ajar switch inputs will be ignored by content theft deterrent (CTD).

Conditions for Clearing the DTC

The DTC will clear when conditions for setting the DTC are no longer present

The number below refers to the step number on the diagnostic table.

1. 3: The hood ajar switch is part of the hood latch assembly.

DTC B3006

When the content theft deterrent (CTD) system arms, and the intrusion sensor is enabled, the body control module (BCM) receives a power-up acknowledgment from the intrusion sensor via the intrusion sensor armed signal circuit.

This diagnostic procedure supports the following DTC

DTC B3089 Content Theft System Intrusion Sensor Signal Circuit

This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to DTC Symptom Description in Vehicle DTC Information.

DTC B3089

1. The intrusion sensor is enabled.
2. The CTD system has armed.

The BCM does not receive the power-up acknowledgment from the intrusion sensor.

The BCM will ignore all inputs from the intrusion sensor for the remainder of the CTD system arming cycle.

DTC B3089 will be cleared if any of the following occur

1. The BCM receives a power-up acknowledgment from the intrusion sensor during the next CTD system arming cycle, and the intrusion sensor is enabled.
2. You use the scan tool to clear DTCs.

DTC B3089

The vehicle theft deterrent (VTD) system is incorporated within the remote control door lock receiver (RCDLR). If the RCDLR has been replaced, the password must be relearned by the engine control module (ECM). If the ECM is replaced, the replacement ECM should learn the password within a few seconds after the ignition is turned ON. This is an information code indicating that the ECM is ready to learn the VTD password.

This diagnostic procedure supports the following DTC

DTC P1630 Theft Deterrent Learn Mode Active

This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to DTC Symptom Description in Vehicle DTC Information.

DTC P1630

The ignition is ON.

The ECM remains in theft deterrent password learn mode for more than 2 seconds.

1. The ECM sends a serial data message to the instrument panel cluster (IPC) to illuminate the SECURITY indicator.
2. The ECM will not illuminate the malfunction indicator lamp (MIL).

Conditions for Clearing the DTC/MIL

1. A history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
2. The DTC can be cleared by using a scan tool.

A GM SPO replacement ECM is in a functional state to learn the password from the RCDLR. If the RCDLR is replaced, the ECM must be placed in password learning mode to relearn the new password. Once learned, the password becomes permanent information that remains in the ECM. The loss of ECM battery or ignition voltage does not affect the programmed password information. Refer to Programming Theft Deterrent System Components (RCDLR Setup) or Programming Theft Deterrent System Components (Domestic) or Programming Theft Deterrent System Components (Export Including Canada) .

DTC P1630

The remote control door lock receiver (RCDLR) sends the fuel enable password to the engine control module (ECM) via the serial data circuit. The ECM verifies the fuel enable password received matches the password stored in memory. If the fuel continue password is correct, the ECM enables the starting and fuel delivery systems. When replacing a ECM with a GM SPO replacement part, the new ECM will learn the incoming fuel enable password immediately upon request.

This diagnostic procedure supports the following DTC

DTC P1631 Theft Deterrent Start Enable Signal Not Correct

This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to DTC Symptom Description in Vehicle DTC Information.

DTC P1631

The ignition is ON.

The ECM receives an incorrect password from the RCDLR.

1. The vehicle will not start.
2. The instrument panel cluster (IPC) will illuminate the SECURITY indicator.
3. The ECM will not illuminate the malfunction indicator lamp (MIL).

1. A History DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
2. The DTC can be cleared by using a scan tool.

A GM SPO replacement ECM is in a functional state to learn the password from the RCDLR. If the RCDLR is replaced, the ECM must be placed in password learning mode to relearn the new password. Once learned, the password becomes permanent information that remains in the ECM. The loss of ECM battery or ignition voltage does not affect the programmed password information. Refer to Programming Theft Deterrent System Components (RCDLR Setup) or Programming Theft Deterrent System Components (Domestic) or Programming Theft Deterrent System Components (Export Including Canada) .

DTC P1631

Important Preliminary Checks Before Starting

1. Review the Theft Deterrent System Description and Operation in order to familiarize yourself with the system functions. Refer to «Content Theft Deterrent (CTD) Description and Operation»(/cadillac/sts/i-2004-2007/remont/door-locks-anti-theft-systems/#theft-deterrent-system__content-theft-deterrent-ctd-description-and) and «Vehicle Theft Deterrent (VTD) Description and Operation»(/cadillac/sts/i-2004-2007/remont/door-locks-anti-theft-systems/#theft-deterrent-system) .
2. Perform the «Diagnostic System Check - Vehicle»(/cadillac/sts/i-2004-2007/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information before using the Symptom Tables 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.

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the keyless entry system. Refer to «Checking Aftermarket Accessories»(/cadillac/sts/i-2004-2007/remont/body-electrical/#wiring-systems-electrical-power-management-introduction__checking-aftermarket-accessories) in Wiring Systems.
2. 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 in Wiring Systems.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Content Theft Deterrent (CTD) Alarm Mode Inoperative»(/cadillac/sts/i-2004-2007/remont/door-locks-anti-theft-systems/#theft-deterrent-system__content-theft-deterrent-ctd-alarm-mode)
2. «Horn Inoperative in Content Theft Deterrent (CTD) Alarm Mode»(/cadillac/sts/i-2004-2007/remont/door-locks-anti-theft-systems/#theft-deterrent-system__horn-inoperative-in-content-theft-deterrent)
3. «Lights Inoperative in Content Theft Deterrent (CTD) Alarm Mode»(/cadillac/sts/i-2004-2007/remont/door-locks-anti-theft-systems/#theft-deterrent-system__lights-inoperative-in-content-theft-deterrent)
4. «Security Indicator Inoperative»(/cadillac/sts/i-2004-2007/remont/door-locks-anti-theft-systems/#theft-deterrent-system__security-indicator-inoperative)
5. «Inclination Sensor Inoperative»(/cadillac/sts/i-2004-2007/remont/door-locks-anti-theft-systems/#theft-deterrent-system__inclination-sensor-inoperative)
6. «Intrusion Sensor Inoperative»(/cadillac/sts/i-2004-2007/remont/door-locks-anti-theft-systems/#theft-deterrent-system__intrusion-sensor-inoperative)
7. «Theft Deterrent Alarm Inoperative»(/cadillac/sts/i-2004-2007/remont/door-locks-anti-theft-systems/#theft-deterrent-system__theft-deterrent-alarm-inoperative)

Content Theft Deterrent (CTD) Alarm Mode Inoperative

Content Theft Deterrent (CTD) Alarm Mode Inoperative

Horn Inoperative in Content Theft Deterrent (CTD) Alarm Mode

Horn Inoperative in Content Theft Deterrent (CTD) Alarm Mode

Lights Inoperative in Content Theft Deterrent (CTD) Alarm Mode

Lights Inoperative in Content Theft Deterrent (CTD) Alarm Mode

Security Indicator Inoperative

Security Indicator Inoperative

Inclination Sensor Inoperative

Inclination Sensor Inoperative

Intrusion Sensor Inoperative

Intrusion Sensor Inoperative

Theft Deterrent Alarm Inoperative

Theft Deterrent Alarm Inoperative

Scheme 53

Hood Ajar Switch Replacement

Removal Procedure

1. Remove the overhead console. Refer to «Courtesy Lamp Replacement - Overhead Console (FRONT)»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-introduction) or «Courtesy Lamp Replacement - Overhead Console (REAR)»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-introduction) in Lighting Systems.
2. Disconnect the electrical connector.
3. Release the tabs securing the sensor to the overhead console.

Installation Procedure

1. Install the sensor securing the tabs to the overhead console.
2. Connect the electrical connector.
3. Install the overhead console. Refer to «Courtesy Lamp Replacement - Overhead Console (FRONT)»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-introduction) or «Courtesy Lamp Replacement - Overhead Console (REAR)»(/cadillac/sts/i-2004-2007/remont/exterior-lights/#lighting-systems-introduction) in Lighting Systems.

1. Remove the right rear compartment trim. Refer to «Compartment Trim Panel Replacement - Rear»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
2. Remove the nuts securing the theft deterrent alarm (1) to the vehicle body.
3. Disconnect the electrical connector (3) from the alarm.
4. Remove the alarm from the vehicle.

1. Reconnect the electrical connector (3) to the alarm.
2. Install the alarm onto the vehicle. Tighten: Tighten the nuts to 9 N.m (80 lb in).
3. Install the rear compartment trim. Refer to «Compartment Trim Panel Replacement - Rear»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-rear-end) in Body Rear End.

1. Remove the right rear compartment trim. Refer to «Compartment Trim Panel Replacement - Rear»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
2. Remove the theft deterrent inclination sensor (2) from the theft deterrent alarm (1)
3. Disconnect the electrical connector from the sensor.
4. Remove the sensor from the vehicle.

1. Reconnect the electrical connector to the sensor.
2. Install the inclination sensor (2) onto the theft deterrent alarm (1).
3. Install the rear compartment trim. Refer to «Compartment Trim Panel Replacement - Rear»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-rear-end) in Body Rear End.

RCDLR Setup Procedure

Conditions

Use this procedure after replacing

The RCDLR

Setup New RCDLR

1. Connect the Tech 2 to the vehicle.
2. Select RCDLR under Module Setup in the Vehicle Control Systems menu.
3. Select Setup New RCDLR.
4. Follow the on screen instructions.

10-Minute Relearn Procedure

Use this procedure after replacing any of the following components

1. The RCDLR
2. The ECM

1. Connect a scan tool to the vehicle.
2. Turn ON the ignition, with the engine OFF.
3. Ensure that all power consuming devices are turned OFF on the vehicle.
4. With a scan tool, select Request Info. under Service Programming System and follow the scan tool on-screen instructions.
5. Disconnect the scan tool from the vehicle and connect the scan tool to a Techline Terminal with the current Service Programming System (SPS) software.
6. On the Techline Terminal, select Service Programming System and follow the Techline Terminal on-screen instructions. Ensure the correct programming procedure is selected based on component being replaced or programmed. See Important above.
7. Disconnect the scan tool from the Techline Terminal and re-connect the scan tool to the vehicle.
8. Turn ON the ignition, with the engine OFF.
9. With a scan tool, select Program ECU under Service Programming System.
10. At this point the scan tool must remain connected for the duration of the 10-minute relearn procedure.
11. Observe the scan tool. After approximately 10 minutes the scan tool will display "Programming Successful, Turn OFF Ignition". The vehicle is now ready to relearn the key fob information and/or the passwords on the next ignition switch transition from OFF to CRANK.
12. Turn OFF the ignition and wait 5 seconds.
13. Start the vehicle. The ECM has now learned the RCDLR password.
14. With a scan tool, clear any DTCs.

30-Minute Relearn Procedure

Use this procedure after replacing any of the following components

1. The RCDLR
2. The ECM

1. Press the START button.
2. Observe the Security telltale. After approximately 10 minutes the telltale will turn off.
3. Turn OFF the ignition, and wait 5 seconds.
4. Repeat steps 1-3 two more times for a total of 3 cycles or 30 minutes.
5. Start the vehicle. The ECM has now learned the RCDLR password.
6. With a scan tool, clear any DTCs.

Use this procedure after replacing any of the following components

1. The RCDLR
2. The ECM

1. Connect a scan tool to the vehicle.
2. Turn ON the ignition, with the engine OFF.
3. Ensure that all power consuming devices are turned OFF on the vehicle.
4. With a scan tool, select Request Info. under Service Programming System and follow the scan tool on-screen instructions.
5. Disconnect the scan tool from the vehicle and connect the scan tool to a Techline Terminal with the current Service Programming System (SPS) software.
6. On the Techline Terminal, select Service Programming System and follow the Techline Terminal on-screen instructions. Ensure the correct programming procedure is selected based on component being replaced or programmed. See Important above.
7. Disconnect the scan tool from the Techline Terminal and re-connect the scan tool to the vehicle.
8. Turn ON the ignition, with the engine OFF.
9. With a scan tool, select Program ECU under Service Programming System.
10. At this point the scan tool must remain connected for the duration of the 10-minute relearn procedure.
11. Observe the scan tool, after approximately 10 minutes the scan tool will display "Programming Successful, Turn OFF Ignition". The vehicle is now ready to relearn the key fob information and/or the passwords on the next ignition switch transition from OFF to CRANK.
12. Turn OFF the ignition and wait 5 seconds.
13. Start the vehicle. The ECM has now learned the RCDLR password.
14. With a scan tool, clear any DTCs.

Content Theft Deterrent (CTD) Description and Operation

The Content Theft Deterrent (CTD) System, when armed, 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. After the initial 30 second timer had expired, the lamps will continue to flash for an additional 90 seconds. Some export vehicles may also use a separate theft deterrent alarm as an alarm sounding device. However, the CTD System does not affect engine starting.

An unauthorized entry can be any of the following with the CTD system armed

1. When any door is opened without being first unlocked by an UNLOCK command from a keyless entry transmitter, a passive unlock from a keyless entry transmitter, or a manual unlock via the door key cylinder
2. Forced entry into the rear compartment
3. Forced entry into engine compartment
4. Battery disconnection
5. The rear integration module (RIM) receives a non-OFF power mode request without first receiving a valid engine control module (ECM) fuel continue message.

The components of the system are

1. Door modules
2. Inclination sensor (RPO UA2)
3. Instrument panel module (IPM)
4. Intrusion sensor (RPO UA2)
5. Hood ajar switch
6. Rear integration module (RIM)
7. Remote control door lock receiver (RCDLR)
8. Theft deterrent alarm (RPO UA2)

Arming the CTD System

Use the following procedure in order to arm the system

1. Place the shift lever in park (P).
2. Turn OFF the ignition.
3. Open and close any door.
4. Lock the doors with an active press of the vehicle door lock switch or the keyless entry transmitter LOCK button. Passive vehicle locking, if enabled, will also arm the content theft deterrent (CTD).

Disarming An Armed System/Silencing An Alarm

If system arming has been requested by the power door lock switch or the transmitter, it must be disarmed.

1. To disarm the CTD system in the armed mode: Press the UNLOCK button on the keyless entry transmitter. Enter the vehicle passively with a correct keyless entry transmitter. Unlocking the vehicle using the door key cylinder Pressing the Off/Acc/Start button with a valid key fob within the vehicle
2. To disarm the CTD System when activated (alarming mode). Press the UNLOCK button on the transmitter. Enter the vehicle passively with a correct keyless entry transmitter. Unlocking the vehicle using the door key cylinder Pressing the Off/Acc/Start button with a valid key fob within the vehicle Using OnStar to disable an alarm mode

CTD Circuit Description

The following is a description of each component used in the Content Theft Deterrent (CTD) System

Door Modules

Each vehicle door has a respective door module. The door modules monitor each door ajar switch signal and communicates their status to the rear integration module (RIM) via serial data. If content theft deterrent (CTD) is in an armed state and a door ajar signal is received by the RIM from a door module, CTD will enter alarm mode.

Inclination Sensor (RPO UA2)

The inclination sensor is monitored by the RIM. The inclination sensor monitors the inclination of the vehicle. This sensor is only equipped on vehicles with RPO UA2. Instances where vehicle inclination may be seen is during unauthorized jacking up of the vehicle or towing of the vehicle. If the CTD is in the armed mode and vehicle inclination is detected, CTD will enter the alarm mode.

Instrument Panel Module (IPM)

The instrument panel module (IPM) is used by the CTD to control light and horn pulsing during the alarm mode. When CTD is in alarm mode, the RIM sends a serial data message to the IPM to pulse the lights and horn. Though the IPM is lighting master, it only physically controls the front vehicle lighting. When an alarm mode is received by the IPM, the IPM will send a serial data message to the RIM, which physically controls the rear vehicle lighting, to pulse the rear lamps.

Intrusion Sensor (RPO UA2)

The intrusion sensor is monitored by the RIM. The intrusion sensor is a shock sensor which monitors forceful entry or movement within the vehicle. This sensor is only equipped on vehicles with RPO UA2. If the CTD is in the armed mode and vehicle intrusion is detected, CTD will enter the alarm mode.

Hood Ajar Switch

The hood ajar switch is used to monitor unauthorized entry into the vehicles underhood area. The RIM monitors the hood ajar switch when in the armed mode. If the hood is seen to be ajar when the CTD is in the armed mode, CTD will enter the alarm mode.

Rear Integration Module (RIM)

The CTD System is an internal function of the RIM which utilizes serial data and various switch inputs information to perform CTD functions. When the RIM detects an unauthorized entry, it will activate the horns, exterior lamps, and on some export vehicle, the theft deterrent alarm. The RIM has basic modes, disarmed, armed, and alarm, for operating the CTD System. The different modes are described below.

1. The CTD state remains disarmed until the following conditions are met: Ignition in the OFF position All vehicle doors and decklid are closed A lock input is received
2. The CTD enters the armed state when the above conditions are met. The lock input may be received either from the keyless entry system via the RCDLR, or from the vehicle door lock switch. In the case of a door lock switch being pressed while a vehicle door is open, the CTD will be armed once all vehicle doors are closed. The security indicator is illuminated solid at this time. The vehicle contents are now secure.
3. If vehicle intrusion is detected, the RIM will put CTD into the alarm state. In this state, the IPM pulses the horn and exterior lamps. If an export vehicle is equipped with a theft deterrent alarm, the theft deterrent alarm will also sound. The CTD will enter alarm mode if one of the following inputs is received: A door ajar signal A decklid ajar signal An intrusion sensor alarm on signal (RPO UA2 only) An inclination sensor alarm on signal (RPO UA2 only) A hood ajar signal

Remote Control Door Lock Receiver (RCDLR)

The keyless entry system is an internal function of the remote control door lock receiver (RCDLR). The RCDLR system can arm and disarm the Content Theft Deterrent (CTD) System. When the RCDLR receives a door lock or unlock signal from the transmitter, the remote keyless entry (RKE) module sends a class 2 message to the RIM in order to perform the appropriate arm/disarm function.

Theft Deterrent Alarm (Some Export Vehicles)

The theft deterrent alarm is a theft deterrent sounder used on some export vehicles. If the CTD System is in the alarm mode, the RIM will request the theft deterrent alarm ON.

Inputs

The rear integration module (RIM) monitors the following inputs

1. Door ajar switches, a serial data message from the door module
2. Power door lock/unlock switches, a serial data message from the door module
3. Hood ajar switch
4. Inclination sensor (RPO UA2)
5. Intrusion sensor (RPO UA2)
6. Passive vehicle locking, a serial data message from the remote control door lock receiver (RCDLR)
7. Transmitter LOCK/UNLOCK buttons, a serial data message from the RCDLR
8. Rear compartment lid ajar switch

Outputs

The rear integration module (RIM) controls the following outputs

The theft deterrent alarm siren

Vehicle Theft Deterrent (VTD) System

The theft deterrent system has been incorporated into the remote control door lock receiver (RCDLR). The theft deterrent is provided in order to prevent the vehicle operation if the correct keyless entry transmitter is not used in order to start the vehicle. The ignition button is pressed and the keyless entry console and headliner antennas broadcast a challenge to the transmitter. If the challenge is met, the keyless entry transmitter will transmit via RF to the RCDLR to enable the vehicle to start. This is accomplished by the RCDLR sending a fuel enable message to the engine control module (ECM).

The design of the keyless access with push button start system is to prevent vehicle theft by disabling the engine unless the correct transmitter is present when attempting to start the vehicle. The system is similar in concept to the PASS-Key III system. However, the keyless access with push button start system eliminates the need for a key; the keyless entry transmitter is considered to be the key. The components of the keyless access with push button start system are as follows

1. The start button
2. The #1-#4 keyless entry transmitters
3. The headliner and console antennas
4. The console active antenna
5. The instrument panel module (IPM)
6. The RCDLR
7. The security telltale
8. The ECM

The Start Button

The start button is located at the upper right side of the steering column on the instrument panel. The start button is used to start the vehicle's engine, turn OFF the vehicle's engine, put the vehicle in ACC mode or put the vehicle in RUN mode.

Keyless Entry Transmitters

The keyless entry transmitters are not only used to passively or actively lock and unlock the vehicle, they are also used to enable the vehicles engine to be started. If the remote control door lock receiver (RCDLR) does not receive a valid RF signal after the fob is challenged by an active antenna, the RCDLR will not send a fuel enable message to the engine control module. A NO FOB DETECTED message will display on the driver information center (DIC).

When any one of the 4 allowable programmed transmitters are challenged by a keyless entry antenna by pressing the start button, they will passively send a RF signal to the RCDLR; the RCDLR will then send a serial data message to the engine control module (ECM) to enable fuel so the vehicle's engine can be started.

Headliner and Console Antennas

The keyless entry headliner and console antennas have a dual purpose. The antennas are used for both keyless entry and vehicle theft deterrent functions. In their keyless entry function, they are used to locate any keyless entry transmitters within the vehicle. In the antennas theft deterrent functions, they transmit and receive the needed communications with the keyless entry transmitter to enable vehicle starting.

The keyless entry headliner antenna is located under the vehicles headliner. The console antenna is located in the vehicle center console. The use of two antennas and the placement of the antennas is to ensure complete coverage of the vehicle interior. The antennas are controlled by the remote control door lock receiver (RCDLR). These antennas share a driver and are controlled simultaneously by the RCDLR. When the start button is pressed, both antennas send out an identical challenge to the keyless entry transmitter.

Console Active Antenna

The keyless entry console active antenna is located in the center console. It has a small pocket next to it where the key fob can be inserted if the key fobs battery is dead, weak or the RF signal is being jammed.

The purpose of the console active antenna is to send a low frequency RF challenge to a programmed key fob when the start button is pressed. The console active antenna is controlled by the remote control door lock receiver (RCDLR).

The IPM is a multifunction module. The IPM is used in the vehicle theft deterrent system as a gateway for the RCDLR to send a fuel enable message to the ECM. The RCDLR is not on the GM LAN high speed bus. The RCDLR will send a serial data message through the IPM as a gateway to the ECM to receive the fuel enable password.

The RCDLR is a multi-function module located in the rear compartment area, on the underside of the rear shelf. The RCDLR can be accessed from the rear compartment. The RCDLR controls all the vehicles antennas for passive and active keyless entry, as well as vehicle theft deterrent and vehicle starting. The RCDLR will send an AC voltage signal and provide ground to the headliner and console antennas when the start button is pressed. This will enable the antennas to send out the low frequency broadcast challenge to a key fob in range. The RCDLR is the module responsible for sending the fuel enable serial data message if all the vehicle theft deterrent requirements are met.

SECURITY Telltale

The SECURITY telltale appears on the instrument cluster. If the SECURITY telltale flashes or if the SECURITY telltale illuminates continuously during the vehicle operation, there is a problem with the vehicle theft deterrent system and it should be serviced by the dealer. The SECURITY telltale is a dual purpose indicator, and with the ignition OFF, it is controlled by the content theft deterrent system. With the ignition ON it is controlled by the vehicle theft deterrent system.

Engine Control Module (ECM)

The ECM communicates with the IPM via the GM LAN high speed bus. When the RCDLR determines a no start condition, it sends a serial data password, via the IPM, to the ECM in order to disable the starting system. If the RCDLR receives a valid key fob RF transmitted frequency, the RCDLR sends a serial data password, via the IPM, to the ECM in order to enable the starting system. The ECM then allows the vehicle to start. If the serial data password from the RCDLR to the ECM is not within the Vehicle Security Status Message, the vehicle will not start. If the ECM does not receive the same password from the RCDLR as the last learned one, the vehicle will not start.

See also:
• Diagnostic System Check - Vehicle
• Control Module References
• Body Control Module (BCM) Programming/RPO Configuration (IPM)
• DTC Symptom Description
• Testing for Intermittent Conditions and Poor Connections
• Circuit Testing
• Wiring Repairs
• Connector Repairs
• Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement
• Checking Aftermarket Accessories
• Diagnostic Starting Point - Body Rear End
• Courtesy Lamps Inoperative
• Power Door Locks Inoperative
• Courtesy Lamps Always On
• Horns Inoperative
• Park Lamps Inoperative
• Fastener Notice
• Courtesy Lamp Replacement - Overhead Console (FRONT)
• Theft Deterrent System Schematics
• Inclination Sensor Inoperative
• Intrusion Sensor Inoperative
• Content Theft Deterrent (CTD) Description and Operation
• Content Theft Deterrent (CTD) Alarm Mode Inoperative
• Horn Inoperative in Content Theft Deterrent (CTD) Alarm Mode
• Lights Inoperative in Content Theft Deterrent (CTD) Alarm Mode
• Security Indicator Inoperative
• Theft Deterrent Alarm Inoperative
• Fastener Tightening Specifications