Keyless Entry System & Remote Functions Cadillac DTS I

Fastener Tightening Specifications

Scheme 22

Scheme 23

Scheme 24

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Diagnostic Starting Point - Remote Functions

Begin the system diagnosis with Diagnostic System Check - Vehicle . The Diagnostic System Check will provide the following information

1. The identification of the control modules which command the system
2. The ability of the control modules to communicate through the serial data circuit
3. The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit/System Description

When replacing a remote control door lock receiver (RCDLR), the service replacement part is shipped with no installed software. Before the new RCDLR is operational, a software calibration is required to be downloaded using the SPS terminal. Failure to download this software calibration will result in the setting of DTC B1008.

Conditions for Running the DTC

This DTC runs continuously

Conditions for Setting the DTC

The RCDLR has no calibration loaded.

Action Taken When the DTC Sets

All functions handled by the RCDLR are inoperative

Conditions for Clearing the DTC

A current DTC will clear when software calibrations are installed.

Reference Information

Schematic Reference

Remote Function Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Keyless Entry System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
4. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Perform the RCDLR Programming and Setup procedure. Refer to «Remote Control Door Lock Receiver Programming and Setup»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__remote-control-door-lock-receiver-programming) .
2. Operate the vehicle within the Condition for Running the DTC and verify the DTC does not reset. If the DTC resets, replace the RCDLR.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for RCDLR replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The remote control door lock receiver (RCDLR) monitors the number of keyless entry transmitters programmed. Until at least one transmitter is programmed, the RCDLR determines a malfunction condition exists.

The keyless entry system must be enabled.

The DTC is set if there are no keyless entry transmitter programmed to the RCDLR.

The keyless entry system is inoperative.

A current DTC is cleared at least one transmitter has been programmed to the RCDLR.

Schematic Reference

Remote Function Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Keyless Entry System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
4. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

J 43241 Keyless Entry Tester. See Special Tools .

Attempt to program the keyless entry transmitter, refer to Transmitter Programming . The transmitter should program.

Circuit/System Testing

1. Verify that the transmitter is the correct transmitter for the vehicle. If not correct, replace the transmitter.
2. Place the transmitter on the test pad of the J 43241 and press each button of the transmitter one at a time. See «Special Tools»(/cadillac/dts/i-2005-2011/remont/door-locks-anti-theft-systems/#keyless-entry-system-remote-functions__special-tools) . The tester should sound a tone and illuminate a green light when each button is pressed. If one or more buttons does not sound the tone and illuminate the green light, replace the transmitter battery and retest with the J 43241 . See «Special Tools»(/cadillac/dts/i-2005-2011/remont/door-locks-anti-theft-systems/#keyless-entry-system-remote-functions__special-tools) . If the condition continues after battery replacement, replace the transmitter.
3. Attempt to program the transmitter, refer to «Transmitter Programming»(/cadillac/dts/i-2005-2011/remont/door-locks-anti-theft-systems/#keyless-entry-system-remote-functions) . The transmitter should program. If the transmitter does not program, test the keyless entry antenna for an open/high resistance. If the circuit tests normal, replace the RCDLR.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for RCDLR replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Without RPO Y41

With each press of a keyless entry transmitter button, a message containing the current battery state of the transmitter is sent to the remote control door lock receiver (RCDLR) along with the commanded keyless entry function.

With RPO Y41

When starting the vehicle, a message containing the current battery state of the transmitter is sent to the remote control door lock receiver (RCDLR).

A keyless transmitter button is pressed.

Ignition ON.

The DTC sets after 3 consecutive low battery signals from the same programmed transmitter.

The keyless entry system is inoperative.

The DTC is cleared when a normal transmitter voltage signal is received from the programmed transmitter that set the DTC.

Schematic Reference

Remote Function Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Keyless Entry System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
4. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Verify none of the following DTCs are set

1. DTC B3109
2. DTC B3110
3. DTC B3111
4. DTC B3112

1. If any of the DTCs are set, replace the battery in the appropriate keyless entry transmitter. Operate the transmitter 3 consecutive times. If the DTC resets, replace the keyless entry transmitter.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Transmitter Programming

Symptoms - Remote Functions

1. Perform «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) 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.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to «Keyless Entry System Description and Operation»(/cadillac/dts/i-2005-2011/remont/door-locks-anti-theft-systems/#keyless-entry-system-remote-functions__keyless-entry-system-description-operation) .

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the Keyless Entry System. Refer to «Checking Aftermarket Accessories»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__checking-aftermarket-accessories) .
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 .

Symptom List

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

1. «Garage Door Opener Inoperative»(/cadillac/dts/i-2005-2011/remont/door-locks-anti-theft-systems/#keyless-entry-system-remote-functions)
2. «Keyless Entry System Inoperative»(/cadillac/dts/i-2005-2011/remont/door-locks-anti-theft-systems/#keyless-entry-system-remote-functions)
3. «Remote Vehicle Start Inoperative»(/cadillac/dts/i-2005-2011/remont/door-locks-anti-theft-systems/#keyless-entry-system-remote-functions)

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The garage door opener (GDO) is a transmitter operating between 288 and 399 MHz. The GDO has three buttons that may be programmed for individual transmitter/receiver combinations to control up to three GDOs, security gates, lighting systems, etc. Each button represents a unique transmitter code section, which operates independently of the other buttons, and may be considered a separate transmitter.

Schematic Reference

Remote Function Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Garage Door Opener Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
4. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

J 41540 Universal Home Remote Tester. See Special Tools .

1. Ignition OFF, disconnect the harness connector at the GDO.
2. Ignition OFF, test for less than 5 ohms of resistance between the ground circuit terminal 3 and ground. If greater than the specified value, test the ground circuit for an open/high resistance.
3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 1 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. Ignition ON, hold the two outer buttons on the GDO for 30 seconds. After 20 seconds, the LEDs will flash indicating that all learned transmitter values have been cleared. After an additional 10 seconds, the LEDs will flash again indicating it has entered the diagnostic mode. Place the J 41540 adjacent to the GDO and press each button of the GDO one at a time. See «Special Tools»(/cadillac/dts/i-2005-2011/remont/door-locks-anti-theft-systems/#keyless-entry-system-remote-functions__special-tools) . The tester should indicate when each button is pressed. If the tester indicates that one or more of the buttons does not respond, replace the GDO.
5. Instruct the customer to program the GDO. Refer to the vehicle owners manual. A possible rolling code or incompatibility with the GDO receiver will prevent programming. Refer to www.learcar2u.com or 1-866-572-2728.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for GDO replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The keyless entry system is a vehicle entry device. The keyless entry will unlock the vehicle doors or open the rear compartment when a corresponding button on the keyless entry transmitter is pressed. This is accomplished by the keyless entry transmitter sending a radio frequency to the remote control door lock receiver (RCDLR). The RCDLR interprets the signal and activates the requested function via a message over the GMLAN serial data line. A low transmitter battery or radio frequency (RF) interference from aftermarket devices such as 2-way radios, power inverters, cellular phone chargers, computers, etc. may cause a system malfunction. High RF traffic areas, such as gas stations which use pay-at-the-pump RF transponders, may also cause interference that could lead to a malfunction.

Diagnostic Aids

For the J 43241 Keyless Entry Tester, inspect the keyless entry transmitter part number to determine that it is the correct model for the vehicle. See Special Tools . A wrong model transmitter may pass the test, but it will not activate the vehicle remote system.

Schematic Reference

Remote Function Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Keyless Entry System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
4. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for Scan Tool Information

Special Tools

J 43241 Keyless Entry Tester. See Special Tools .

Attempt to program the keyless entry transmitter, refer to Transmitter Programming . The transmitter should program.

1. Verify that the transmitter is the correct transmitter for the vehicle. If not the correct transmitter, replace the transmitter.
2. Verify the scan tool FOB Programmed parameter for the applicable transmitter is Yes. If not the specified value, program the transmitter. Refer to «Transmitter Programming»(/cadillac/dts/i-2005-2011/remont/door-locks-anti-theft-systems/#keyless-entry-system-remote-functions) .
3. Place the transmitter on the test pad of the J 43241 and press each transmitter button one at a time. See «Special Tools»(/cadillac/dts/i-2005-2011/remont/door-locks-anti-theft-systems/#keyless-entry-system-remote-functions__special-tools) . The tester should sound a tone and illuminate a green light with each button press. If one or more buttons does not sound the tone and illuminate the green light, replace the transmitter battery and retest with the J 43241 . See «Special Tools»(/cadillac/dts/i-2005-2011/remont/door-locks-anti-theft-systems/#keyless-entry-system-remote-functions__special-tools) . If the condition continues after battery replacement, replace the transmitter.
4. Operate the transmitter while observing the scan tool Fob Function parameter for the applicable transmitter. The parameter should correspond with the function selected on the transmitter. If the parameter does not match the function selected on the transmitter, replace the transmitter.
5. Attempt to program the transmitter, refer to «Transmitter Programming»(/cadillac/dts/i-2005-2011/remont/door-locks-anti-theft-systems/#keyless-entry-system-remote-functions) . The transmitter should program. If the transmitter does not program, test the keyless entry coax and/or antenna for a short to ground or an open/high resistance. If the circuit tests normal, replace the RCDLR.
6. If all circuits test normal, replace the RCDLR.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Transmitter Programming»(/cadillac/dts/i-2005-2011/remont/door-locks-anti-theft-systems/#keyless-entry-system-remote-functions)
2. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for RCDLR replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of each diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Remote vehicle start (RVS) begins as an RF message received by the remote control door lock receiver (RCDLR) from a keyless entry transmitter. The RVS request is sent by the RCDLR to the body control module (BCM) via serial data. The BCM monitors system conditions such as content theft deterrent (CTD), hood ajar status, and body DTCs to determine if an RVS event will occur. If conditions are determined to be acceptable, the RVS message is sent to the engine control module (ECM). The ECM monitors system conditions such as engine control parameters and vehicle theft deterrent (VTD) to determine if engine starting will be allowed. If conditions are acceptable, the ECM will initiate engine starting. During the engine run time in a RVS attempt, before the operator enters the vehicle, the ECM may discontinue engine operation if system conditions require it or a message is received from the BCM requesting the engine be turned OFF.

The RVS system will not operate if any of the following conditions are present

1. The vehicle is in valet mode.
2. More than 2 remote starts have been attempted.
3. The hazard switch is in the ON position.
4. A current hazard switch DTC is set.
5. The vehicle hood is ajar.
6. A current hood ajar DTC is set.
7. The CTD system detects an alarm trigger.
8. Excessive engine RPM
9. Excessive coolant temperature
10. Accelerator pedal position greater than 0 percent
11. Vehicle not in park
12. Vehicle theft deterrent malfunction
13. A current automatic transmission shift lock control system DRC is set.
14. A vehicle speed sensor signal is detected by the ECM.
15. A current vehicle DTC that illuminates the malfunction indicator lamp (MIL)

Schematic Reference

Remote Function Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Keyless Entry System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
4. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for Scan Tool Information

1. Verify that RVS is enabled through vehicle personalization. If RVS is not enabled, use vehicle personalization to turn on RVS functionality. Refer to the vehicle owners manual.
2. Verify that the keyless entry functions operate with all available keyless entry transmitters. If the keyless entry system does not function properly, refer to «Keyless Entry System Inoperative»(/cadillac/dts/i-2005-2011/remont/door-locks-anti-theft-systems/#keyless-entry-system-remote-functions) .
3. Observe the scan tool ECM and BCM RVS Disable History parameters, Verify that no RVS Disable History items are present. If RVS Disable History items are present, refer to the applicable subsection in which the failure occurred.
4. Verify the scan tool BCM Current CTD Trigger parameter displays None. If not specified value, refer to «Content Theft Deterrent Malfunction»(/cadillac/dts/i-2005-2011/remont/door-locks-anti-theft-systems/#theft-deterrent-system) .

Scheme 25

Scheme 26

Garage Door Opener Programming - Universal

Programming the GDO for Rolling Code Receivers

This procedure will learn a rolling code garage door opener to the GDO transmitter. The learn process must be completed within 30 seconds.

1. Press the two outside buttons of the GDO for one to two seconds, then immediately release them.
2. Locate the "Learn" or "Smart" button on the garage door opener receiver (located on the garage door opener motor-head unit). It is often found where the hanging antenna wire is attached to the motor-head unit and may be a colored button. Refer to the garage door opener operator's manual or call 1-866-572-2728 for assistance. Press the "Learn" or "Smart" button. The garage door opener operator's manual may provide assistance in determining when the unit is in learn mode.
3. Immediately return to the GDO transmitter in the vehicle. Press and hold the button that is to be learned; the LED above the button will begin to flash slowly. When the garage door moves, immediately release the button. The LED will flash rapidly until programming is complete.
4. Press the button used during the learn operation again in order to verify that the GDO transmitter has been programmed.

The GDO is compatible with most, but not all, types of garage door openers. If the GDO LED does not flash rapidly after 90 seconds, there may be a compatibility conflict with the garage door opener. Call 1-866-572-2728 to address compatibility concerns.

Programming the GDO for Fixed Code Receivers

This procedure will learn a fixed code garage door opener to the GDO transmitter. To determine if the customer has a fixed code garage door opener, remove the battery cover on the customer supplied transmitter. If a row of dip switches is present, the garage door opener is a fixed code version. The transmitter should have anywhere from 8 to 12 switches. The garage door opener receiver may also have a set of dip switches. If the number of switches on the receiver and the transmitter do not match, use the receiver switches to program the GDO. Each dip switch may have either two or three positions. The two position switch can either be ON or OFF. The three position switch can either be ON, NEUTRAL, or OFF.

1. Write down the positions of the dip switches. The positions of the switches will be entered from left to right into the GDO using the three buttons.
2. Press all three buttons on the GDO for three seconds and immediately release them. The LEDs should flash slowly, indicating that the GDO is in programming mode.
3. Enter the positions of the dip switches one at a time. If a position of a dip switch is on, press the left button on the GDO. If the position is neutral, press the middle button of the GDO. If the position is off, press the right button of the GDO. Enter all of the positions of the dip switches. The procedure must be completed in two and a half minutes.
4. Press and hold all three buttons on the GDO until all the LEDs turn on.
5. Press and hold the button that is to be learned; the LED above the button will begin to flash slowly. When the garage door moves, immediately release the button. The LED will flash rapidly until programming is complete.
6. Press the button used during the learn operation again in order to verify that the GDO transmitter has been programmed.

The GDO is compatible with most, but not all, types of garage door openers. If the GDO light does not flash rapidly after 90 seconds, there may be a compatibility conflict with the garage door opener. Call 1-866-572-2728 to address compatibility concerns.

Erasing Channels

To erase programmed channels, press and hold the two outside buttons until the lights on the GDO transmitter begins to flash. Once the LEDs begin to flash, release both buttons; all learned codes are now erased.

Individual channels cannot be erased, but can be reprogrammed using the procedures above.

Scheme 27

Next Available Slot

This procedure will program keyless entry transmitters in sequential order. If two transmitters are currently learned to the vehicle as transmitters 1 and 2, using this procedure will learn the next transmitter are transmitter 3, and so on.

1. With a scan tool, access the Remote Control Door Lock Receiver Module Setup menu. Select Program Key Fobs.
2. Select Next Available Slot. The vehicle chime will sound two times to indicate programming mode has been entered. Follow the on-screen instructions. After each transmitter has been programmed, the vehicle chime will sound to confirm the programming.
3. When all the desired transmitters have been programmed, cycle the ignition from ON to OFF, exit the vehicle, and operate the transmitter functions in order to verify correct system operation.

Invalidate All Fobs

This procedure will first erase all known keyless entry transmitters. After all transmitters are erased, the procedure will being to program keyless entry transmitters in sequential order, beginning with transmitter 1.

1. With a scan tool, access the Remote Control Door Lock Receiver Module Setup menu. Select Program Key Fobs.
2. Select Invalidate All Fobs. This will erase all learned transmitters and prepare the RCDLR to learn new transmitters. Follow the on-screen instructions. After each transmitter has been programmed, the vehicle chime will sound to confirm the programming.
3. When all the desired transmitters have been programmed, cycle the ignition from ON to OFF, exit the vehicle, and operate the transmitter functions in order to verify correct system operation.

Garage Door Opener Description & Operation

The garage door opener (GDO) is fixed and rolling code capable. Rolling code is a system that allows the code that the customers receiver receives from the GDO to change every time the GDO is used within operating range of the receiver. Rolling code programming requires the customer to push a learn/program button on the GDO receiver at their home. This button is usually located on the receiver unit under a cover (light cover) on one end of the unit. The customer must follow the GDO manufacturers instructions to program/learn the receiver to accept the Universal Home Remote System as an authorized opener for their unit. When the receiver and the GDO are initially programmed together, a code is established and a new code is created for every new transmission. The software in the receiver recognizes the GDO and accepts the new code.

The GDO is compatible with most, but not all types and brands of transmitters. If a problem should occur with a compatibility conflict with a transmitter, refer to 1-866-572-2728.

The GDO is a transmitter operating between 288-399 MHz. The power and range of the transmitter is limited to comply with laws governing the generation of radio frequency interference (RFI). The transmitter is programmed by the user to accept the signal generated by the user's transmitters.

The GDO has 3 buttons that may be programmed for individual transmitter/receiver combinations to control up to 3 GDOs, security gates, lighting systems, etc. Each button represents a transmitter code section of the transmitter, which operates separately from any other button, and may be considered a separate transmitter. Operation consists of simply pressing a button to activate the corresponding transmitter.

Keyless Entry System Description & Operation

The keyless entry system is a vehicle entry device. The keyless entry system is used in conjunction with the body control module (BCM) to remotely activate certain vehicle features. Keyless entry will lock/unlock the doors, or release the rear compartment lid when a corresponding button on the keyless entry transmitter is pressed. This is accomplished by the transmitter sending a radio frequency to the remote control door lock receiver (RCDLR). The RCDLR interprets the signal and activates the requested function via a serial data message to the BCM. A low transmitter or vehicle battery or radio frequency (RF) interference from aftermarket devices, such as 2-way radios, power inverters, computers, etc., may cause a system malfunction. High RF traffic areas may also cause interference that could lead to a malfunction. Keyless entry allows you to operate the following components

1. Door locks
2. Rear compartment lid release
3. Remote vehicle starting, if equipped
4. Illuminated entry lamps
5. Vehicle locator/Panic alarm

The keyless entry system has the following components

1. Keyless entry transmitters
2. Keyless entry antenna
3. BCM
4. RCDLR

Keyless Entry Transmitters

The keyless entry transmitters are used to lock and unlock the vehicle door while away from the immediate area of the vehicle. Vehicles without remote vehicle start will operate at a distance of up to 20 m (65 ft) away. Vehicle with remote vehicle start will operate at a distance of up to 60 m (195 ft) away. Up to 8 transmitters may be programmed to a single vehicle.

Keyless Entry Antenna

The keyless entry antenna is used to receive radio frequency (RF) communications sent by the keyless entry transmitters. The keyless entry antenna also receives RF signals from the tire pressure monitoring (TPM) sensors located at each wheel.

A coax antenna lead connects the antenna to the remote control door lock receiver (RCDLR). When a transmitter button is present, the RF signal sent by the transmitter is received by the antenna and the communications are inputted to the RCDLR.

Remote Control Door Lock Receiver (RCDLR)

The remote control door lock receiver (RCDLR) is a multifunction module that operates both the keyless entry system as well as the TPM system. When an RF message is received from a keyless entry transmitter, the RCDLR interprets this signal and will request via serial data that the body control module (BCM) perform the specific function, i.e. door lock, door unlock, or vehicle locate.

Unlock Driver Door Only

Momentarily press the transmitter UNLOCK button in order to perform the following functions

1. Unlock only the driver door.
2. Illuminate the interior lamps for a determined length of time, or until the ignition is turned ON
3. Flash the exterior lights, if enabled through personalization
4. Disarm the Content Theft Deterrent (CTD) System, if equipped
5. Deactivate the CTD system when in the alarm mode

Unlock All Doors - Second Operation

Momentarily press the transmitter UNLOCK button a second time, within 5 seconds of the first press, to perform the following function

Unlock the remaining doors

Lock All Doors

Press the transmitter LOCK button to perform the following functions

1. Lock all vehicle doors
2. Immediately turn OFF the interior lamps
3. Flash the exterior lights, if enabled through personalization
4. Chirp the horn, if enabled through personalization
5. Arm the CTD System, if equipped

Rear Compartment Lid Release

Press the transmitter rear compartment lid release button to perform the following function

Open the rear compartment lid

Vehicle Locator/Panic Alarm

A single press of the panic button performs the following functions. Some functions may be dependent on personalization settings

1. Pulse the horn three times
2. Flash the exterior lamps three times

A press and hold of the panic button performs the following functions

1. Illuminate the interior lamps
2. Pulse the horn and flash the exterior lamps for 30 second or until the following conditions occur: The panic button is pressed The ignition switch is turned to the RUN position with a valid key

Remote Vehicle Start (RVS) - if equipped

The remote vehicle start (RVS) function allows engine starting while not in the vehicle. It also allows the vehicle HVAC system and other vehicle systems to enable, providing a comfortable vehicle upon entry. RVS functions have an operating range of up to 195 feet, depending on conditions. The RVS sequence begins by pressing and releasing the lock button and then pressing and holding the RVS buttons on the keyless entry transmitter. The turn signal lamps will illuminate to indicate the vehicle has received the remote start request. Each time an RVS is performed, the vehicle doors are locked, however they may then be unlocked/locked with the transmitter or vehicle key at any time. Once activated, the engine is allowed to run for 10 minutes. The RVS time may be extended by an additional 10 minute by again pressing and releasing the lock button and then pressing and holding the RVS buttons on the transmitter. This feature is called a RVS continue and allows a maximum of 20 minutes of engine running. If the RVS continue is performed at 7 minutes into the initial 10 minute time-out, a total of 17 minutes of engine running would occur. The RVS event may be suspended at any time by pressing only the RVS button on the transmitter or by entering the vehicle and turning ON the hazard lamps.

In between ignition cycles, only two RVS events may occur or be attempted. Once two events or attempts have been made, future RVS events will be suspended until the vehicle is started using the ignition.

Enable/Disable RVS

Using the driver information center (DIC), RVS may be enabled or disabled as a part of vehicle personalization. Refer to the vehicle owners manual for more information.

Hood Ajar Switch

The hood switch provides status of the hood to the BCM for RVS purposes. The switch is integrated into the hood latch assembly. The hood ajar switch provides 2 separate inputs to the BCM. These separate inputs allow the BCM to actively monitor for a hood ajar switch fault.

RVS Circuit Description

The RCDLR receives a signal from the keyless entry transmitter indicating a RVS request. A message is then sent to the BCM which determines if a crank request message will be sent to the ECM to allow engine starting. To determine if conditions are correct for an RVS event, the BCM will ensure the following conditions are met

1. All vehicle doors are closed
2. A valid hood ajar switch closed signal is present
3. The doors are locked
4. The hazard switch is OFF
5. The vehicle power mode is correct
6. No content theft deterrent (CTD) alarm triggers are present
7. The vehicle is not in valet mode (if equipped)

When the BCM determines all conditions meet those required for an RVS event, a message is sent via serial data to the ECM. The ECM relies on the RVS message from BCM to enable RVS when the crank request signal is received. If the ECM does not receive a valid RVS message, it will not attempt to start the engine. While the ECM is in RVS mode it will suspend engine operation if any of the following additional conditions occur

1. Vehicle speed is greater than 0
2. Transmission is not in PARK
3. Excessive engine coolant temperature
4. Low oil pressure
5. The malfunction indicator lamp (MIL) is commanded ON
6. Engine crank time is greater than 30 seconds
7. Excessive engine speed
8. Accelerator pedal position too high
9. Remote start timer equals 0
10. Immobilizer system indicates tamper

Keyless Entry Personalization

Vehicle lock/unlock functions and remote vehicle start (RVS) settings may be personalized. For functional descriptions and personalization instructions, refer to the vehicle owners manual.

Rolling Code

The Keyless Entry System uses rolling code technology. Rolling code technology prevents anyone from recording the message sent from the transmitter and using the message in order to gain entry to the vehicle. The term "rolling code" refers to the way that the Keyless Entry System sends and receives the signals. The transmitter sends the signal in a different order each time. The transmitter and the remote control door lock receiver (RCDLR) are synchronized to the appropriate order. If a programmed transmitter sends a signal that is not in the order that the RCDLR expects, then the transmitter is out of synchronization. This occurs after 256 presses of any transmitter button when it is out of range of the vehicle.

Automatic Synchronization

The keyless entry transmitters do not require a manual synchronization procedure. If needed, the transmitters automatically re-synchronize when any button on the transmitter is pressed within range of the vehicle. The transmitter will operate normally after the automatic synchronization.

Special Tools

Illustration Tool Number/ Description J 41540 Universal Home Remote Tester J 43241 Keyless Entry Tester

Scheme 28

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• Component Connector End Views
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Control Module References
• Remote Control Door Lock Receiver Programming and Setup
• Diagnostic Repair Verification
• Checking Aftermarket Accessories
• Content Theft Deterrent Malfunction
• Rear Compartment Front Trim Panel Replacement
• Fastener Notice
• Roof Console Replacement
• DTC B1008
• Keyless Entry System Description and Operation
• Special Tools
• Garage Door Opener Description and Operation
• Fastener Tightening Specifications