Door System, Mirror System & Window System: Other Cadillac STS I

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.

Power Windows Inoperative - Express Up Function

Power Windows Inoperative - Express Up Function

Power Windows Inoperative - Lockout Function

Power Windows Inoperative - Lockout Function

Power Window Inoperative from Master Switch

Power Window Inoperative from Master Switch

Power Window Inoperative - Passenger Door

Power Window Inoperative - Passenger Door

Door Ajar Indicator Malfunction

Door Ajar Indicator Malfunction

Power Door Latch Inoperative - Driver Door

Power Door Latch Inoperative - Driver Door

Power Door Latch Inoperative - Passenger Door

Power Door Latch Inoperative - Passenger Door

Door Lock Indicator Malfunction

Door Lock Indicator Malfunction

Power Door Locks Inoperative

Power Door Locks Inoperative

Power Door Locks Inoperative - Key Cylinder Switches

Power Door Locks Inoperative - Key Cylinder Switches

Automatic Door Locks Inoperative

Automatic Door Locks Inoperative

Power Mirrors Inoperative

Power Mirrors Inoperative

Power Mirrors - Folding Inoperative

Power Mirrors - Folding Inoperative

Mirrors - Outside Automatic Day-Night Feature Inoperative

Mirrors - Outside Automatic Day-Night Feature Inoperative

Power Mirrors - Mirror Tilt Inoperative in Reverse

Power Mirrors - Mirror Tilt Inoperative in Reverse

Heated Mirrors Inoperative - One

Heated Mirrors Inoperative - One

Scheme 31

Door, Hinge Replacement - Front Door

Scheme 32

Lock Assembly, Inside Handle Cable Assembly Replacement - Front Door (w/o UA2)

Scheme 33

Lock Assembly, Inside Handle Cable Assembly Replacement - Front Door (UA2)

Scheme 34

Applique, Weatherstrip, Sealing Strip Replacement - Front Door

Scheme 35

Mirror, Mirror Face Replacement - Front Door

Scheme 36

Water Deflector, Check Link Replacement - Front Door

Scheme 37

Striker, Weatherstrip Replacement - Side Door

Scheme 38

Door, Hinge Replacement - Rear Door

Scheme 39

Channel, Applique, Weatherstrip, Sealing Strip Replacement - Rear Door

Scheme 40

Water Deflector, Check Link, Energy Absorber Replacement - Rear Door

Tools Required

J 36796 Clip Zip Clip Removal Tool. See Special Tools .

J 36796 Clip Zip Clip Removal Tool. See Special Tools .

Window Motor Programming - Express Function

If the vehicles battery has been disconnected, each side door window regulator motor must be reprogrammed in order for the express-UP or express-DOWN feature to operate properly. Keep in mind, that if something is obstructing the window from opening or closing and you continue programming, the window will only express-UP or express-DOWN to the spot where the obstruction occurred. If an obstruction comes in contact with the window during the programming procedure, the procedure will have to be repeated.

The following steps explain how to program the side door window regulator motors

1. Press and hold the power window switch until the window is fully DOWN.
2. Continue holding the power window switch for approximately 3 seconds.
3. Press and hold the power window switch until the window is fully UP.
4. Continue holding the power window switch for approximately 3 seconds.
5. The power window regulator motor is now programmed for the express function.
6. Repeat this process for all of the power windows.

Power Windows System Components

The power windows system consists of the following components

1. Driver door module (DDM) - GMLAN device that receives and transmits messages and signals for window functionality
2. Passenger front door module (PDM) - GMLAN device that receives and transmits messages and signals for window functionality
3. Left rear door module (LRDM) - GMLAN device that receives and transmits messages and signals for window functionality
4. Right rear door module (RRDM) - GMLAN device that receives and transmits messages and signals for window functionality
5. Driver door switch assembly (DDSA) - GMLAN device that contains the driver, front passenger, RR and LR window and window lockout switches
6. Right front power window switch - provides switched ground window switch signals to the PDM for the front passenger window
7. Left rear power window switch - provides switched ground window switch signals to the LRDM for the left rear passenger window
8. Right rear power window switch - provides switched ground window switch signals to the RRDM for the right rear passenger window
9. Left front power window motor - contains position sensors and a module that receives signals from the DDM and provides a status signal to the DDM
10. Right front power window motor - contains position sensors and a module that receives signals from the PDM and provides a status signal to the PDM
11. Left rear power window motor - contains position sensors and a module that receives signals from the LRDM and provides a status signal to the LRDM
12. Right rear power window motor - contains position sensors and a module that receives signals from the RRDM and provides a status signal to the RRDM
13. DRIVER DR MOD fuse (10-amp)
14. FRT PASS DR MOD fuse (15-amp)
15. REAR DR MOD fuse (10 amp)
16. Power Window Motors Circuit Breaker (30-amp)

Power Window Controls

The driver power window can be controlled by the driver window switch located on the DDSA. The passenger windows can be controlled by the power window switches located on the DDSA or from the power window switch mounted locally on its associated door.

The power windows can be controlled in the following modes

1. Up
2. Down
3. Express Up
4. Express Down

Window Lockout Feature

The window lockout switch is part of the DDSA. The lockout function is used to prevent the passenger door windows from being operated from their locally mounted switches. When the lockout switch is pressed momentarily, the switch contacts are briefly closed, the LED indicator on the switch button is illuminated, and the DDSA processes the switch signal. The DDSA sends the switch status via GMLAN serial data to the passenger door modules. The passenger door modules then prohibit the windows from being operated from the locally mounted passenger door window switches. When the lockout function has been activated, the passenger door windows can still be operated from the driver door by using the window switches built into the DDSA. the front passenger window can be personalized to operate when the window lockout function is active. Refer to Vehicle Personalization (w/o Voice Recognition) or Vehicle Personalization (w/Voice Recognition) in Personalization.

Power Door Latch System Components

1. Remote control door lock receiver (RCDLR) - GMLAN device that provides passive keyless entry status information to the DDM and PDM
2. Driver door module (DDM) - GMLAN device that receives door handle switch inputs and controls the power door latches
3. Passenger door module (PDM) - GMLAN device that receives door handle switch inputs and controls the power door latches
4. Door handle assembly - includes the lift handle and unlatch enable switches on the driver and front
5. Power door latches - electrically operated door latches in the driver and front passenger doors
6. DRIVER DR MOD 10 A fuse
7. FRT PASS DR MOD 15 A fuse

Power Door Latch Controls

Control of the power door latches is dependent on the door lock status. If the status of the door lock system is UNLOCK, the power door latches will electrically release after lifting the exterior door handle. If the status of the door lock system is LOCK, one of the following inputs will be required before the latch will release

1. A door unlock switch activation
2. A door key cylinder unlock switch activation
3. An active keyless entry unlock command
4. A passive keyless entry unlock command message is received by the DDM or PDM from the RCDLR

Once any of the above inputs has been received, the power door latches will electrically release after lifting the exterior door handle.

The interior door handles provide a mechanical link between the handle and the latch and requires no electrical inputs or outputs to release the door latch.

For further information on the power door lock status, refer to Power Door Locks Description and Operation . For further information on the active and passive keyless entry system, refer to Keyless Entry System Description and Operation in Keyless Entry.

Power Door Lock Components

The power door lock system consists of the following components

1. Driver door lock switch - provides a switched ground signal to the DDSA for both lock and unlock switch activations
2. Passenger front door lock switch - provides a switched ground signal to the PDM for both lock and unlock switch activations
3. Driver door switch assembly (DDSA) - GMLAN device that communicates lock and unlock requests to the door modules
4. Driver door module (DDM) - GMLAN device that controls the driver door lock status indicator and deadbolt lock actuator on export vehicles
5. Passenger front door module (PDM) - GMLAN device that controls the front passenger door lock status indicator and deadbolt lock actuator on export vehicles
6. Left rear door module (LRDM) - GMLAN device that controls the left rear door lock actuator and deadbolt lock actuator on export vehicles
7. Right rear door module (RRDM) - GMLAN device that controls the left rear door lock actuator and deadbolt lock actuator on export vehicles
8. Driver door lock status indicator - red LED located on driver door trim that illuminates when the lock system is in a virtual state of lock
9. Passenger front door lock status indicator - red LED located on driver door trim that illuminates when the lock system is in a virtual state of lock
10. Left rear door latch assembly - contains the door lock actuator and deadbolt lock actuator on export vehicles
11. Right rear door latch assembly - contains the door lock actuator and deadbolt lock actuator on export vehicles
12. Remote Control Door Lock Receiver (RCDLR) - GMLAN device that receives RFA transmissions and communicates with the door modules for lock and unlock commands
13. Driver DR MOD fuse (10-amp) - located in the left rear fuse block and is hot at all times
14. FRT PASS DR MOD fuse (15-amp) - located in the right rear fuse block and is hot at all times
15. REAR DR MOD fuse (10-amp) - located in the left rear fuse block and is hot at all times
16. GMLAN serial data link

Door Lock System Controls

The power door lock system can be controlled by any of the following

1. Automatic door lock function
2. Driver door key cylinder unlock switch activation
3. Driver door key cylinder lock switch activation (Export)
4. Power door lock switch activation
5. Remote keyless entry transmission

Power Door Lock Switches

The front passenger door lock switch is wired to the PDM. The lock switch receives a constant ground source. There are 2 signal circuits, one for lock signal, and one for unlock signal. When the switch is activated for a lock or unlock function, the normally open switch contacts for that function are closed and provide a switched ground signal to the PDM.

The driver door lock switch is wired to the DDSA. The lock switch receives a constant ground source. There are 2 signal circuits, one for lock signal, and one for unlock signal. When the switch is activated for a lock or unlock function, the normally open switch contacts for that function are closed and provide a switched ground signal to the DDSA. These switch activations are detected and processed by the DDSA and then communicated to the DDM via a GMLAN message.

Power Door Lock Motors

A power door lock motor is contained within each rear door latch assembly. The RRDM and LRDM supplies voltage and ground, through the door lock actuator motor control circuits to its associated door lock actuator motor. The power door lock motors are reversible. The function performed by the lock motor depends on which motor control circuit the voltage is applied to, and which motor control circuit the ground is applied to. To perform a lock function, the module momentarily applies voltage to the door lock motor lock control circuit, and ground to the door lock motor unlock control circuit. To perform a unlock function, the door module reverses polarity and momentarily applies voltage to the door lock motor unlock control circuit, and ground to the door lock motor lock control circuit.

Power Door Lock Deadbolt Motors (Export)

Export vehicles may be equipped with the deadbolt feature, which includes a reversible deadbolt motor contained within each door latch assembly. Each deadbolt motor is wired to the associated door module through 2 circuits; the deadbolt motor lock control circuit and the door lock motor unlock control circuit. To deadbolt a door, the door module locks the door by momentarily applying voltage to the door lock motor lock control circuit, and ground to the door lock motor unlock control circuit. To complete the deadbolting, the door module then momentarily applies voltage to the deadbolt motor control circuit and ground to the door lock motor unlock control circuit. Once the door is deadbolted, the mechanical lock/unlock linkage within the door lock actuator is physically disconnected so that the door can not be manually unlocked. If the content theft feature is armed at the same time, the interior door lock switches will not operate the locks.

To undeadbolt the door, the door module reverses the polarity, applying battery voltage to the door lock motor unlock control circuit, and ground to the deadbolt motor control circuit.

Automatic Door Locks

The automatic door lock system provides for the locking or unlocking of one or all of the doors when shifting the transmission. When the vehicle doors are closed with the ignition turned ON and the transmission is shifted out of PARK, all doors will lock. When the vehicle is stopped and the transmission is shifted into PARK, one or all of the doors will unlock.

Operation of the automatic door lock system also depends upon door status information gathered by the associated door module, and examined by the RCDLR. The system will not operate properly if the RCDLR, which is the door lock master, detects that a vehicle door is open. Each door lock actuator contains a door open switch. Each door open switch receives voltage and ground from the associated door module. When a door is open, the switch closes, voltage flows through the switch, and the door module interprets the flow of voltage as a door open input. The door module sends this information over the GMLAN serial data circuit where it is detected by the RCDLR. If the RCDLR determines that one of the vehicle doors is open, automatic door locking will not be permitted.

The signals supplied by the door open switches are also used by the lighting system in order to determine when to turn the vehicle courtesy lamps ON or OFF. For more information concerning courtesy lamps and the door open switches, refer to Interior Lighting Systems Description and Operation in Lighting Systems.

It should further be noted that, while each door open switch shares its ground circuit with another switch in the door lock actuator, the door ajar indicator switch, the 2 switches must not be confused when service is required. Unlike the door open switch, the door ajar indicator switch has no affect on door locking. For more information concerning door ajar indicators and the door ajar indicator switches, refer to Door Ajar Indicator Description and Operation .

Automatic door locking is programmed during the manufacturing process, but it can be custom programmed by the operator to fit individual preferences. For information concerning custom programming available and programming instructions, refer to Driver Personalization in Personalization.

Central Door Unlock

The vehicle may be equipped with the central door unlock feature. With this feature, all doors can be unlocked from the driver door using the door key. To operate the feature, the door key is inserted into the driver door lock cylinder, turned to the unlock position and held for 3 seconds or longer, or turned to the unlock position twice within 3 seconds. A mechanical linkage rod connects the driver door lock cylinder to the key cylinder unlock switch, which is built into the driver door latch assembly. The key cylinder unlock switch contacts, which are normally open, receive a constant ground via the ground circuit. When the door key is turned to unlock, the switch contacts close and the DDM detects a switched ground. The DDM sends a message via GMLAN serial data to the RCDLR, indicating the key cylinder unlock switch request. The RCDLR is the master of all lock and unlock operations. If the RCDLR determines that the key cylinder unlock switch request is valid and conditions are correct for the door modules to perform the unlock function, it sends a message via GMLAN serial data back to all door modules to unlock all doors.

Central Door Lock and Deadbolt (Export)

Some export vehicles may be equipped with the central door lock feature. Some export vehicles may have both the central door lock and deadbolt features. With the central door lock feature, all doors can be locked from the driver door using the door key. With the central door lock and deadbolt features, all doors can be locked and deadbolted from the driver door using the door key. When the doors have been deadbolted, they cannot be unlocked using the manual lock buttons. If the content theft feature is armed at the same time, the interior door lock switches will not operate the locks. All doors can be undeadbolted using the driver door key, however, only the driver door will be unlocked. After undeadbolting with the door key, the passenger doors can be unlocked manually, or by using either the interior lock switches or the remote function actuator (RFA).

To operate the central door lock feature, the door key is inserted into the driver door lock cylinder and turned to the lock position. This causes all doors to lock immediately. A mechanical linkage connects the driver door lock cylinder to the key cylinder lock switch, which is built into the driver door lock actuator. The key cylinder lock switch contacts, which are normally open, receive a constant ground source ground circuit. When the door key is turned to lock, the switch contacts close and the DDM detects a switched ground signal The DDM then sends a message via GMLAN serial data to the RCDLR, indicating the key cylinder lock switch request. If the RCDLR determines that the key cylinder lock switch request is valid and conditions are correct for the door modules to perform the lock function, a message is sent via GMLAN serial data back to all door modules to lock all doors.

To operate the deadbolt feature, the door key is inserted into the driver door lock cylinder and turned to the lock position. This causes all doors to lock immediately. If the door key is then held to the Lock position for 3 seconds or longer, or, turned to the Lock position twice within 3 seconds, the DDM interprets the key cylinder lock switch input as a deadbolt request. The DDM then sends a message via GMLAN serial data to the RCDLR indicating the request. If the RCDLR determines that the deadbolt request is valid and conditions are correct for the door modules to perform the deadbolt function, a message is sent via GMLAN serial data to all door modules to deadbolt all doors. When the doors are deadbolted, all doors are locked and the mechanical lock/unlock linkage within each door lock actuator is physically disconnected so that no door can be manually unlocked. If the content theft feature is armed at the same time, the interior door lock switches will not operate the locks.

To undeadbolt the doors with the driver door key, the key cylinder unlock switch is used. The key cylinder unlock switch input is interpreted as an undeadbolt request because the vehicles content options are configured for export. The normally open key cylinder unlock switch contacts receive a constant ground source. When the driver door lock cylinder is turned to unlock, the switch contacts close and the DDM detects a switched ground signal. The DDM then sends a message via GMLAN serial data to the RCDLR indicating the switch request. The RCDLR interprets the key cylinder unlock switch request as an undeadbolt request. If all conditions are correct, the RCDLR sends a message back to all door modules to undeadbolt. The driver door will be unlocked and undeadbolted while the passenger doors will be undeadbolted only. The passenger doors can be unlocked manually, or by using either the interior lock switches or the remote function actuator (RFA).

By performing the following actions, the doors can be locked and deadbolted or unlocked and undeadbolted using the remote function actuator (RFA)

1. Press the RFA lock button once to lock all doors, then press a second time within 3 seconds to deadbolt all doors.
2. Press the RFA unlock button once to undeadbolt and unlock the driver door and undeadbolt all passenger doors, then press a second time within 3 seconds to unlock all passenger doors

Door Ajar Indicator System Components

The door ajar indicator system consists of the following components.

1. Driver door module (DDM) - GMLAN device that receives the switched input from the door ajar switches and communicates the status to the Instrument Panel Cluster (IPC)
2. Passenger front door module (PDM) - GMLAN device that receives the switched input from the door ajar switches and communicates the status to the Instrument Panel Cluster (IPC)
3. Left rear door module (LRDM) - GMLAN device that receives the switched input from the door ajar switches and communicates the status to the Instrument Panel Cluster (IPC)
4. Right rear door module (RRDM) - GMLAN device that receives the switched input from the door ajar switches and communicates the status to the Instrument Panel Cluster (IPC)
5. Driver information center (DIC) - Part of the Instrument Panel Cluster (IPC)
6. Integrated radio chassis (IRC) - GMLAN device that will provide an audible warning for the door ajar indicator system
7. Driver door ajar switch - part of the door latch and provides a switched ground signal for both door ajar and door open
8. Passenger door ajar switch - part of the door latch and provides a switched ground signal for both door ajar and door open
9. Left rear door ajar switch - part of the door latch and provides a switched ground signal for both door ajar and door open
10. Right rear door ajar switch - part of the door latch and provides a switched ground signal for both door ajar and door open

The door ajar indicator system function is to alert the vehicle operator when a vehicle door has inadvertently been left ajar or open. Failure of the door ajar indicator system does not affect door locks or any other vehicle system.

Driver Door Ajar Switch

The DDM receives a discrete input from the driver door ajar switch. The IPC and IRC receive the status of the driver door from the DDM via GMLAN serial data. When the driver door is open/ajar and the vehicle is in any gear other than PARK, the driver information center (DIC) will display DRIVER DOOR AJAR. If the door is still ajar and the vehicles speed is greater than 4.8 km/h (3 mph) the DDM will send GMLAN serial data message to the IRC requesting 5 chimes to sound.

Passenger Door Ajar Switch

The PDM receives a discrete input from the passenger front door ajar switch. The IPC and IRC receive the status of the passenger door from the PDM via GMLAN serial data. When the passenger door is open/ajar and the vehicle is in any gear other than PARK, the driver information center (DIC) will display PASSENGER DOOR AJAR. If the door is still ajar when the vehicles speed is greater than 4.8 km/h (3 mph) the PDM will send a GMLAN serial data message to the IRC requesting 5 chimes to sound.

Left Rear Door Ajar Switch

The LRDM receives a discrete input from the left rear door ajar switch. The IPC and IRC receive the status of the left rear door from the LRDM via GMLAN serial data. When the left rear door is open/ajar and the vehicle is in any gear other than PARK, the driver information center (DIC) will display LEFT REAR DOOR AJAR. If the door is still ajar when the vehicles speed is greater than 4.8 km/h (3 mph) the LRDM will send a GMLAN serial data message to the IRC requesting 5 chimes to sound.

Right Rear Door Ajar Switch

The RRDM receives a discrete input from the right rear door ajar switch. The IPC and IRC receive the status of the right rear door from the RRDM via GMLAN serial data. When the right rear door is open/ajar and the vehicle is in any gear other than PARK, the driver information center (DIC) will display RIGHT REAR DOOR AJAR. If the door is still ajar when the vehicles speed is greater than 4.8 km/h (3 mph) the RRDM will send a GMLAN serial data message to the IRC requesting 5 chimes to sound.

Outside Mirror System Components

The power outside rearview mirror system consists of the following components

1. Driver door switch assembly (DDSA) - GMLAN device that contains the mirror select, fold and direction switches.
2. Driver door module (DDM) - GMLAN device that controls the mirror horizontal, vertical and fold motors. Supplies a 5 volt and low reference to the mirror position sensors, interprets and stores their positions.
3. Passenger front door module (PDM) - GMLAN device that controls the mirror horizontal, vertical and fold motors. Supplies a 5 volt and low reference to the mirror position sensors, interprets and stores their positions.
4. Remote control door lock receiver (RCDLR) - GMLAN device that provides driver identification information to the DDM and PDM for memory recalls.
5. Base or navigation radio - GMLAN device that provides driver identification setup and recall information to the DDM and PDM.
6. Driver outside mirror - contains horizontal, vertical and fold mirror motors, heating elements, auto dimming and also horizontal and vertical position sensors if equipped.
7. Passenger outside mirror- contains horizontal, vertical and fold mirror motors, heating elements, auto dimming and also horizontal and vertical position sensors if equipped.
8. DRIVER DR MOD 10 A fuse
9. FRT PASS DR MOD 15 A fuse

Outside Rearview Mirror Controls

For non memory mirrors, the outside rearview mirrors are controlled by the driver door switch assembly (DDSA) which contains the mirror control switches. The DDSA decodes mirror control switch activations while the door modules apply battery voltage and ground to their respective mirror motors to move the mirrors to the desired positions.

For memory mirror applications, the mirrors can be controlled as outlined above or by any of the following

1. A keyless entry unlock transmission - which will position the mirrors, among other features, to predetermined positions for up to two different drivers.
2. A passive keyless entry command - upon opening the driver door, to predetermined positions for up to two different drivers.
3. A memory recall activation through the radio.
4. A voice activation memory recall through the navigation radio.

For further information on personalizing the memory recall functions, refer to Driver Personalization in Personalization.