Info - DTS - New Model Features and Service Guide

This is a special bulletin to introduce the new Cadillac DTS. The purpose of this bulletin is to familiarize dealership service personnel with the vehicle's features and describe the actions the Service Department will need to take to ensure they are able to fully service this exciting new model.

The purpose of this section is to familiarize you with the technical aspects of the vehicle.

Engine

The DTS comes equipped with the 4.6L (RPO LD8 - VIN Code Y) engine on the Luxury I, II and III models and equipped with the 4.6L (RPO L37 - VIN Code 9) on the Performance Package model.

The vehicle is now equipped with an ECM and TCM which replace the PCM on previous model year vehicles. The powertrain also features ETC and a new exhaust system, as well as a new mounting and cradle design.

Transmission

The DTS is equipped with the 4T80E transaxle. The 4T80E features an Internal Mode Switch (IMS) The transmission is controlled by a TCM. The TCM maintains the following adapt parameters for the transmission:

Important:  The transmission may experience harsh, soft or mushy shifts for up to two days after the adapts are cleared.

Transmission adapts must be cleared using the Tech 2® whenever the transmission is overhauled or replaced. In order to clear transmission adapts, select the following:

1. F0: Diagnostics
2. Select Model Year
3. Select Vehicle
4. Select Make
5. Select Model
6. F6: Transmission/Transaxle
7. Select Automatic Transaxle
8. F2: Special Function
9. F0: Transmission Control Module
10. F6: Reset Adapts

Brakes

The DTS is equipped with the DBC7.2 antilock braking system. Coated park brake cables are used to reduce apply effort and increase corrosion protection. Plastic coated park brake cables do not require periodic lubrication. The cables are coated with a plastic material which slides against nylon seals inside the conduit end fittings. Park brake lever/cable adjustment is automatic.

Important: Cycling the lever two or three times should properly adjust the park brake after disabling it for service.

Suspension

The DTS is equipped with the Electronic Suspension Control (ESC) system. This is also known as Magneto-Rheological Real Time Dampening (MRRTD), which independently controls the fluid viscosity in each of the shocks in order to control the vehicle ride characteristics. The ESC system is made up of the following components:

The ESC controls the dampening mode selection according to the following inputs:

The ESC system does not have a malfunction indicator lamp. Instead, it uses the instrument panel cluster to display functions. When the ESC detects a malfunction that sets a DTC, one of the following messages will be displayed on the IPC:

If the ESC detects a malfunction, it will default with a fail-soft action. A fail-soft action refers to any specific action the ESC takes in order to compensate for a detected malfunction. A message will remain ON until the RESET button is pressed on the driver information center. As long as the DTC is current, the message will be displayed after every ignition cycle and the RESET button must be pressed to bypass the message.

Ultrasonic Front and Rear Parking Assist (UFRPA)

(Not available on Luxury I models -- standard on all other models) UFRPA is designed to assist the driver in parking the vehicle. It will only operate at speeds less then 8 km/h (5 mph). The system will detect objects that are at least 254 mm (10 in) off the ground and below the hood or trunk level. The system will detect objects up to 1.2 m (4 ft) away in front of the vehicle and up to 2.5 m (8 ft) in back of the vehicle. The front parking assist display is mounted on the center of the dash and the rear park assist is mounted in the center of the headliner at the rear window.

If the UFRPA system will not activate due to a temporary condition, the message PARKING ASSIST OFF will be displayed on the DIC and a red light will be shown on the rear UFRPA display when the shift lever is moved into REVERSE. The following conditions will set the PARKING ASSIST OFF message:

Forward Collision Alert (FCA) System

(FCA is available on all vehicles except the Luxury I model) The Forward Collision Alert (FCA) system provides an audible and visual alert if your approach a vehicle too quickly that is directly ahead. FCA will provide a visual alert with no audible alert, if another vehicle is being followed too closely. The FCA alert symbol is located on top of the instrument panel to the right of the driver. FCA uses the Adaptive Cruise control radar to detect a vehicle directly ahead in the vehicle's path, within a distance of 100 m (328 ft) and operates at speeds above 32 km/h (20 mph). To enable or disable the FCA, press the Adaptive Cruise Control button located on the left side of the steering wheel. FCA is enabled when the green light on the button is lit.

Caution: 

Three messages may appear on the DIC relating to the FCA system:

Adaptive Cruise Control (ACC)

(Adaptive Cruise Control is optional on all models except Luxury I) Adaptive Cruise Control is an enhanced cruise control system that has the ability to sense and react to forward traffic. ACC allows the driver to set and maintain a following distance to the preceding nearest vehicle in the ACC vehicle path. The ACC system automatically adjusts the speed of the vehicle when the vehicle approaches a slower moving vehicle in front. ACC applies limited automatic braking and throttle control without the driver's input, when necessary, to maintain the set following distance.

ACC system depends on the following components to function. Each component is critical for proper operation. ACC will not operate if any components fail.

The Distance Sensing Cruise Control (DSCC) module will inhibit the Adaptive Cruise Control (ACC) system when any of the following conditions exist:

The ECM will inhibit the ACC system during any of the following conditions:

Electrical Architecture

The communication among control modules is performed through the GMLAN high speed serial data circuit and the GMLAN low speed serial data circuit. The modules that need real time communication are attached to the high speed GMLAN network. The body control module (BCM) is the gateway between the networks. The purpose of the gateway is to translate serial data messages between the GMLAN high speed bus and the GMLAN low speed bus.

The body control module (BCM) is wired to the GMLAN High Speed serial data bus, and the GMLAN Low Speed serial data bus, as well as discrete input and output terminals to control the functions of the vehicles body systems. The body control module is the translator between the High and Low speed GMLAN busses. The two communication protocols use the BCM to translate communicated serial data messages between the control modules over the two serial data busses. The DTS' body control module functions as the power mode master (PMM). The Power Mode Master (PMM) determines which power mode (Run, Accessory, Crank, RAP, or Off) is active and reports this information to other modules.

Refer to SI document ID # 1629549 for a complete list of control modules and data link types.

Charging System

The DTS is equipped with an electrical power management (EPM) system which monitors and controls the charging system and sends diagnostic messages to alert the driver of possible problems with the generator or the battery. The EPM function is designed to perform regulated voltage control (RVC) to improve battery state of charge, battery life and fuel economy. The BCM communicates with the ECM and the IPC for electrical power management operation. The EPM system performs three functions:

The electrical power management system consists of the following components:

Pass-Key® III+

Pass-Key® III+ is a passive theft-deterrent system. It works when the key is inserted or removed from the ignition or transition the key to run, accessory or start from the OFF position. If Pass-Key® III+ system senses the wrong key, it prevents the vehicle from starting. It is possible for the Pass-Key® III+ decoder to "learn" the transponder value of a new or replacement key. Up to nine additional keys may be programmed for the vehicle.

Valet Lockout Switch

A valet lockout switch is located inside the glove box. When the lockout feature is OFF, the trunk can be opened using either the keyless entry transmitter or the trunk release button located near the headlamp switch on the instrument panel. When the lockout feature is ON, the trunk cannot be unlocked with the keyless entry transmitter or the trunk release button. If the valet lockout feature is ON, it will also disable the Universal Home Remote transmitter, if equipped.

Heated Windshield Washer Fluid

If equipped, the heated windshield washer fluid system may be used to help clear the windshield. Sliding the switch on the turn signal/multifunction lever to this position and releasing it will activate the heated windshield washer fluid system. This activation will initiate four heated wash/wipe cycles. The first heated wash/wipe cycle may take up to 40 seconds to occur, depending on the outside temperature. After the first wash/wipe cycle. it may take up to 20 seconds for each of the remaining cycles. The heated windshield washer fluid system may be turned off at any time by sliding the switch on the turn signal/multifunction lever to this position again.

Climate Control System

A solar sensor is located in the defrost grille in the middle of the instrument panel and monitors the solar radiation. If the solar sensor is covered, the system will not work properly. There is an interior temperature sensor located next tot he steering wheel that measures the temperature of the air inside the vehicle. The exterior temperature sensor is located behind the front grille. The exterior sensors reads the outside temperature and helps to maintain the temperature inside the vehicle. Any cover on the front of the vehicle could cause a false reading in the displayed temperature. To prevent false temperature readings at startup, the displayed temperature will not change until the following occurs:

Towing

The DTS was not designed to be towed with all four wheel on the ground -- also known as Dinghy towed. If the vehicle is Dinghy towed, the drivetrain components could be damaged.

If it is necessary to tow the DTS, the vehicle should be Dolly towed. Refer to the Owner Manual for the proper steps to Dolly tow the vehicle.

Lamps

The Luxury III and Performance Package models offer IntelliBeam Automatic High Beam Headlamps.

The purpose of this section is to familiarize you with some of the unique characteristics of the vehicle. The following functions may operate differently than what the customers are used to and are considered normal.

Unnecessary FCA Alerts

FCA may occasionally provide alerts that are considered unnecessary. It could respond to a turning vehicle, guard rails, signs, and other stationary objects. This is considered a normal operating characteristic of the system.

Heated Steering Wheel

The heated steering wheel's normal operating temperature is 32°C (89.6°F). The steering wheel takes approximately 3 to 4 minutes to reach the normal operating temperature. The steering wheel will take longer to heat up if the vehicle temperature is below -21°C (-5.8°F). The built-in temperature sensor provides input to the controller to limit the temperature to the normal operating temperature. The heated steering wheel feature will not operate if the vehicle temperature is at or above 32°C (89.6°F).

Heated/Cooled Seats

If the vehicle is equipped with remote start and is started using the remote keyless entry transmitter, the front heated seats will turn on to the high setting if it is cold outside. When the key is inserted into the ignition and turned on, the heated seat feature will turn off.

High Intensity Discharge (HID) Lighting

If a HID headlamp bulb has been replaced, the beam may be a slightly different shade than it was originally or compared to the other headlamp. This is a normal characteristic.

Parade Dimming

Parade dimming prohibits the dimming of the digital displays and backlighting during daylight hours, when the key is in the ignition and the headlamps are on. This feature is fully automatic. When the light sensor reads darkness outside and the parking lamps are active, the digital displays can then be adjusted by turning the instrument panel brightness knob counterclockwise to dim and clockwise to brighten the lighting.

Diversity Antenna System

The AM-FM antenna is integrated with the rear window defogger. Aftermarket glass tinting with metallic film will interfere with or distort the incoming radio reception. If static is heard on the radio with the rear window defogger turned on, it could mean that a defogger grid line has been damaged.

Heated Windshield Washer Fluid

When the heated windshield washer fluid system is activated under certain outside temperature conditions, steam may flow out of the washer nozzles for a short period of time before washer fluid is sprayed. This is a normal condition. The first heated wash/wipe cycle may take up to 40 seconds to occur, depending on the outside temperature. After the first wash/wipe cycle. it may take up to 20 seconds for each of the remaining cycles.

Outside Power Foldaway Mirrors

If the mirrors are accidentally folded/unfolded manually, they may shake or flutter at normal driving speeds and may not stay in the unfolded position. If this occurs, the mirrors will need to be reset. To reset the power foldaway mirrors, fold and unfold them three times using the mirror controls. This will reset them to their normal position.

Tehama Aniline Leather

Tehama leather is extremely soft and responsive to the touch. Tehama leather is a natural looking product therefore it bears genuine characteristics such as grain variations and marks. Tehama leather has very little surface coatings which results in its soft feel and subtle color variation. Over time, a naturally aged appearance will emerge.

Leather conditioners and cleaners are not designed for Tehama Leather. They will alter the color and gloss of Tehama leather. Tehama leather should only be cleaned using a cloth slightly dampened with clean water to remove surface dirt or dust with light strokes of hand. In the event of a liquid spill, the liquid should be removed by absorption with a clean dry towel or sponge as quickly as possible and left to dry naturally. In time, some stains may diminish into the leather and may blend into surrounding regions through natural wear.

The following new tools have been released for the 2006 Cadillac DTS:

The PDI form was revised to ensure special attention is paid to the areas listed below. For Dealers in Canada, the PDI form is available for download from the "GM World of Warranty" on the GMinfoNET.

Reset Fuel Economy

Be sure to reset the fuel economy display to zero prior to delivery to the customer.

Tire Pressures

Vehicles are shipped from the assembly plant with higher than recommended tire pressure. the pressures are optimized for transportation of the vehicle. Tire pressures are a key ingredient of ride quality. It is very important to adjust the tire pressures to the recommended level, as noted on the tire label located on the driver's door, prior to delivery.

Battery Life

Check and charge the battery, if necessary. It is the dealer's responsibility to maintain the battery until delivery to the customer.

Brake Burnish

If the vehicle has set for a long period of time, it will be necessary to burnish the brakes during the PDI test drive, prior to delivering the vehicle to the customer. Refer to Corporate Bulletin # 00-05-22-002F (Brake Pulsation -- Corrosion) for more details.

Window Cleaning

A hazy film may build up on interior glass surfaces due to plasticizers emitted from the interior trim components. To remove this film, use the following procedure:

1. Spray the entire glass surface with plain water. Avoid any type of chemical cleaner.
2. Use a dry sponge covered with a paper towel. Avoid any type of cloth. use of a dry sponge to attache the paper towel pieces is recommended in order to apply uniform pressure on the glass.
3. Wipe the glass surface in a uniform, linear, length-wise fashion, one swipe at a time. Avoid circular swipes.
4. Discard paper towel after each swipe.

Paint Protection

Foam blocks are installed on both front doors. They are designed to protect the vehicle while in storage or on display. The foam blocks should NOT be removed until the vehicle is delivered to the owner.