Info - New Model Features and Service Guide

The purpose of this bulletin is to introduce the new 2006 Buick Lucerne. Included is a description of the vehicle's features as well as actions your Service Department will need to take to ensure that your dealership is able to fully service this exciting new model.

The 2006 Buick Lucerne is available in three different models, the CX, CXL and the CXS. Lucerne brings a fresh approach to the market by combining high-level technology and luxury features with a spacious, quiet interior.

Engine

The Lucerne CX and CXL come standard with a 3.8L 3800 Series III V6 (RPO L36/L67) -- VIN code K/1. A 4.6L V8 (RPO LD8) -- VIN code Y is optional for the CXL and is standard for the CXS. Both engines feature a new Electronic Throttle Control system that seamlessly matches driver input with engine response to improve overall fuel efficiency.

Transmission

The vehicle may be equipped with either a 4T65-E (RPO M15) automatic transmission in the V6 or a 4T80-E (RPO MH1) automatic transmission in the V8.

4T65-E

The 4T65-E is a fully automatic front wheel drive electronically controlled transmission. The 4T65-E provides four forward ranges including overdrive. The PCM controls shift points by means of two shift solenoids. A vane-type oil pump supplies the oil pressure. The PCM regulates oil pressure by means of a pressure control solenoid valve. The PCM also maintains information for the following transmission adaptive systems:

Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, the PCM will need to relearn TAP values. Transmission performance may be affected as new TAPs are learned. The PCM must also relearn TAP values when the PCM or the transmission is replaced.

4T80-E

The 4T80-E is a fully automatic front wheel drive electronically controlled transmission. The 4T80-E provides four forward ranges including overdrive. The transmission control module (TCM) controls shift points by means of two shift solenoids. Three gear-type oil pumps supply the oil pressure. The TCM regulates oil pressure by means of a transmission pressure control solenoid. The TCM controls the shift schedule and the TCC apply rates. Many sensor inputs also influence the shift schedule and the TCC apply rates.

The transmission control module (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 whenever the transmission is overhauled or replaced. In order to clear transmission adapts, select the following:

1. Scan tool
2. Special Functions
3. Transmission Output Controls
4. Clear TAP

Suspension

The Lucerne CXS model 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.

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 gateway will interact with each network according to that network's transmission protocal.

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 Lucerne's body control module functions as the power mode master (PMM). The PMM determines which power mode (Run, Accessory, Crank, RAP, or Off) is active and reports this information to other modules.

SI Document ID 1686336 identifies which serial data link that a particular module uses for in-vehicle data transmission. There are potentially 27 different modules that can be found on the Lucerne. SI Document ID  1693614 provides a list of modules as well as links to schematics, repair instructions and programming and set-up information.

Driver Information Center

The driver information center (DIC) display is located on the instrument cluster below the speedometer. The DIC controls are located on the instrument panel to the left of the steering wheel.

Steering Wheel Controls

The following features can be accessed using the steering wheel controls:

Exterior Lamp Control Positions

The fog lamp switch is located in the center of headlamp switch and is a push on/off type switch.

Personalization Features

The following personalization features are available through the DIC:

Remote Vehicle Start

This available feature allows the customer to start the vehicle from the outside the vehicle by using the Remote Keyless Entry transmitter. Normal range of the transmitter is 60 m (200 ft) from the vehicle. The engine will run for 10 minutes before turning itself off. It can be extended 10 minutes more by performing another remote start sequence at any time. If the vehicle has automatic climate control and the remote start system is activated, the HVAC system will sense the outside temperature and automatically enter the appropriate optimal pre-cooling or pre-heating mode regardless of the heat/air conditioning setting on the instrument panel.

To start the vehicle using the remote start feature, do the following:

1. Aim the transmitter at the vehicle.
2. Press and release the transmitter's lock button, then immediately press and hold the transmitter's remote start button until the turn signal lamps flash, or if the vehicle's lights are not visible, press and hold the transmitter's remote start button for four seconds. The vehicle's doors will lock.
3. When the vehicle's engine starts, the parking lamps will turn on and remain on while the engine is running.

The engine will shut off automatically after 10 minutes, unless a time extension has been done or the vehicle's key is inserted into the ignition switch and turned to RUN.

Unlock the door(s) with the transmitter or key. If you enter the vehicle after a remote start, and the engine is still running, insert the key into the ignition switch and turn it to the RUN position to drive the vehicle.

4. To manually shut off a remote start, do any of the following:

•	Aim the remote keyless entry transmitter at the vehicle and press the remote start button until the parking lamps turn off.

•	Turn on the hazard warning flashers.

•	Turn the ignition switch to RUN and then to OFF.

Your vehicle's engine may be started two times using the transmitter's remote start feature. If only one remote start procedure has been done since last driving the vehicle, or resetting the remote start system, the engine may be started again remotely following the remote start procedure a second time

If the remote start procedure is used again before the first ten minute time frame has ended, 10 minutes will be added to the remaining minutes. The added 10 minutes are considered a second remote start.

The remote vehicle start feature will not operate if:

If a remote start is attempted and is unsuccessful, the Driver Information Center (DIC) will display REMOTE START DISABLED.

Vehicles equipped with the remote vehicle start feature are shipped from the factory with the remote vehicle start system enabled. The system may be disabled through the DIC.

Passenger Air Bag Status Indicator

The vehicle's passenger sensing air bag system has a status indicator located on the overhead console. With the key in Run or Start, the indicator blinks on/off for several seconds as a system check. Following, the light will stay on or off to indicate passenger side air bag status. If it shows that the air bag is on, it means that the air bag is enabled (could inflate). If it shows that the air bag is off, the passenger air bag is disabled.

Rear Parking Assist

The available ultrasonic rear parking assist (URPA) can help a driver determine how close an object is to the rear bumper within a defined rearward field of view.

The rear parking assist display is located on the rear shelf. The display has 3 indicators that can be seen through the rearview mirror or by turning around when seated in the driver seat.

When the ignition is ON and the vehicle is placed into reverse, the URPA performs a bulb check. During the bulb check, the 3 indicators on the display illuminate for approximately 2 seconds to indicate that the system is working. The URPA performs a bulb check and operates when the following conditions are present:

The URPA senses how close the vehicle is to an object. The distance is determined by the four ultrasonic sensors located on the rear bumper. When the system detects an object, one of the following will occur:

URPA can detect objects 7.6 cm (3 in) wide and at least 25.4 cm (10 inches) tall. It cannot detect objects above the level of the roof.

If the red indicator flashes continuously, the on-board diagnostic needs to be entered to determine if a malfunction is present.

Tire Pressure Monitoring System (TPM)

The Tire Pressure Monitor (TPM) system alerts the driver when a large change in the pressure of one tire exists while the vehicle is being driven. The TPM system uses the Electronic Brake Control Module (EBCM), ABS wheel speed sensor inputs, class 2 serial data circuit, and the Driver Information Center (DIC) to perform the system functions. The EBCM contains software to calculate relative tire pressure differences. The software requires approximately 30 minutes of straight line driving in each of the 3 speed ranges to complete the calibration process to have full capability for detecting a tire pressure condition. The speed ranges are as follows:

Each speed range has 2 modes of tire pressure detection:

The EBCM learns the tire pressure configuration for each speed range independently. In Monitor Mode 1, the EBCM has only partially learned the tire pressure calibration for the speed range and has limited detection capability for a tire pressure conditions. In Monitor Mode 2, the EBCM has fully learned the tire pressure calibration for the speed range and has full detection capability for a tire pressure condition. Once the TPM system has learned the tire pressure calibration the EBCM monitors the ABS wheel speed sensor inputs, which will all be the same as the learned calibration if the tire pressures stay the same. If the pressure in one tire increases or decreases so too will that tire's circumference and radius, which causes that wheel speed sensor input to change. The EBCM recognizes this change in wheel speed as a tire pressure condition. If the pressure in one tire becomes at least 69 kPa (10 psi) lower or higher than the other three the EBCM commands the DIC to display the CHECK TIRE PRESSURE warning message via a class 2 serial data circuit. This message does not appear if more than one tire pressure is high or low, or if the system is not calibrated properly. The system does not alert the driver to which tire pressure is high or low.

To reset (calibrate) the system using the DIC:

1. Turn the ignition switch to RUN, with the engine off.
2. Press the vehicle information button on the DIC until the RESET TIRE SYSTEM message appears on the display.
3. Press and hold the DIC Set/Reset button for about five seconds. After five seconds, the display will show TIRE PRESSURE RESET.

Rainsense™ II Windshield Wipers

If equipped, the Rainsense™ Windshield Wipers use a moisture sensor to automatically operate the wipers when needed, depending on driving conditions and the sensitivity setting. In light rain or snow, fewer wipes will occur. In heavy rain or snow, wipes will occur more frequently. The system will operate in the delay, low speed and high speed modes. The system is activated by turning the wiper control band to one of the five sensitivity levels within the delay area.

The MIST and wash cycles operate as normal and are not affected by the Rainsense™ function. The system can be overridden at any time by manually changing the wiper control to low or high speed.

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 45 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.

HVAC System

On remote start, automatic HVAC equipped vehicles will adjust cabin temperature and turn on defoggers according to outside temperature and default back to the previous key off setting when the key is inserted and rotated forward. AC compressor will also default on when not remote started. If the system was in vent mode and AC off, on the next ignition cycle, the AC will turn on. This is designed to assist in window defogging.

Rainsense™ II Windshield Wipers

If the Rainsense™ system is left on for long periods of time, occasional wipes may occur without any moisture on the windshield. This is normal and indicates that the system is active

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 45 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.

Audio Mute/Voice Recognition Button

Press and release this button to silence the audio system. Press and release this button again, to turn the sound on. Press and hold this button for longer than one second to interact with the OnStar® system. If the vehicle is also equipped with the Navigation system, push this button to initiate voice recognition, and say "OnStar" to enter OnStar® mode.

Anti-Lockout Feature

Leaving the key in the ignition with any door open will disable the use of the power door locks and the RKE lock function. the anti-lockout feature can be overridden by holding the lock switch in the LOCK position for more than 3 seconds. A chime will sound and the door will lock.

Rear Cargo Net

The rear cargo net hooks are provided with the vehicle, but the cargo net must be purchased separately from the parts department.

Valet Key

The valet key is not provided with the vehicle. It is available only through the parts department.

Electronic Service Information

All required service information is currently online on GM SI. A dealership can also find the most current Owner's Manual and Labor Time Guide online at website http://service.gm.com and under Service Information link.

The PDI form was revised to ensure special attention is paid to the areas listed below. Refer to Corporate Bulletin # 03-00-89-006C. 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 back 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.

Vehicle Protection

Mylar tape is installed on all outside door handles. The purpose of this protection is not only to protect the vehicle during transportation from the plant to the dealer, but also while the vehicle is stored. The tape should NOT be removed until the vehicle is delivered to the owner.