COMPASS MINI - TRIP COMPUTER SELF-DIAGNOSTIC TEST
The Compass Mini - Trip Computer (CMTC) is capable of performing a diagnostic self check on many of its internal functions. CMTC diagnostics may be performed using a DRB lll® scan tool and the proper Body Diagnostic Procedures Manual or by the following procedure.
1.With the ignition switch in the OFF position, press both the US/M and STEP button.
2.Turn ignition switch to the ON position.
The CMTC will perform internal checks while lighting all segments of the vacuum florescent display. Upon completion of the internal check, the CMTC will display.
If any segment of the CMTC fails to light replace the module.
If FAIL is displayed, replace the module.
If CCd is displayed, check the CCD and Body Control Module (BCM) for proper operation, refer to the appropriate diagnostic test procedures manual If the CCD and the BCM are OK, replace the CMTC module.
Compass Mini-Trip Computer (CMTC) Switches and Display
The Compass Mini-Trip Computer (CMTC) system is located in the overhead console. CMTC consists of a electronic control module with a vacuum fluorescent display (VFD) and function switches. The CMTC consists of a electronic module that displays compass, trip computer, and temperature features. Actuating the STEP switch will cause the CMTC to change mode of operation when ignition is ON. Example:
•Trip odometer (ODO)
•Average miles per gallon (ECO)
•Instant miles per gallon (ECO)
•Distance to empty (DTE)
•Elapsed time (ET)
The CMTC module in the overhead console has three buttons used to select various functions. The CMTC selector buttons will not operate until the ignition is in the RUN position.
When the ignition switch is first turned to the RUN position the CMTC display;
•All segments of the VFD will light for one second
•Returns to the last mode setting selected before the ignition was last switched OFF.
THERMOMETER AND COMPASS
Engine temperature can increase the displayed temperature. The CMTC is designed to dampen temperature readings when the vehicle is moving at a rate slower than 18 miles per hour.
The outside temperature is measured from a sensor mounted in the front of the vehicle. If the temperature is more than 55°C (131°F) or the temperature sending line is shorted to ground, the temperature display should read SC. If the temperature is less than -40°C (-40°F), or the sending line is an open circuit, the display should read OC.
The CMTC will not allow the temperature reading to increase when the vehicle is not moving.
The CMTC is self calibrating and usually requires no adjustment. The compass will continuously perform a slow calibration to compensate for small magnetic variations common to any automobile. Uncommon magnetic shifts may be caused by items such as magnetic base antennas, which can permanently alter the magnetic field of the vehicle roof panel. If excessive magnetic field continues for 5 minutes, the compass heading will go blank and only the CAL symbol will illuminate. When this occurs, the vehicle roof panel may require demagnetizing. Refer to the demagnetizing procedure in this section.
Moderate magnetic shifts may, on very rare occasions, cause the compass heading to display only one or two of the eight possible headings. Although the compass will eventually compensate for this shift, it could take several ignition cycles. The compensation process can be expedited by manually activating the fast calibration routine. Refer to the fast calibrating procedure in this section. This procedure may be performed anytime that the compass appears to be inaccurate.
If the calibration data stored in the body control module is not received, the compass will read only NE North-East. The CMTC is self calibrating and requires no adjusting. The word CAL is displayed to show that the compass is in calibration mode. CAL will turn off after the vehicle has gone through three complete circles without stopping, in an area free of magnetic disturbance. If module displays temperature while the compass is blank, turn off ignition and run self diagnostics then demagnetize the vehicle. If problem persists, then demagnetize vehicle.
Universal Transmitter Location
The Universal Transmitter, replaces the hand held remote controls that open the garage door, motorized gates, or home lighting in/outside the home. This device memorizes the activator codes for up to three remote controlled devices. It triggers those devices at the push of a button, located in a unit permanently mounted in your overhead console (if equipped).
The transmitter operates off your vehicle's battery and charging system; no batteries are needed.
The Universal Transmitter incorporates a Rolling Code technology (random digital code signals from the remote transmitter) within the transmitter module. This is done so, as an added security measure.
Features of the Universal Transmitter are:
•Can be used with most other Radio Frequency (RF) activated devices.
•Individual channels can be trained.
•Stores transmitter data in permanent memory - retraining is not required even if the battery dies or is disconnected.
To operate, simply press the appropriate button on the Universal Transmitter. The red LED will light up while the signal is being transmitted.
For security reasons, you are able to erase the trained frequencies.
COMPASS CALIBRATION PROCEDURE - service procedures
•COMPASS CALIBRATION PROCEDURE
•COMPASS CALIBRATION PROCEDURE (FAST METHOD)
COMPASS CALIBRATION PROCEDURE
Variance is the difference between magnetic North and geographic North Variance Settings. To adjust the compass variance set the CMTC to Compass/Temperature mode and press RESET buttons for 5 seconds. The symbol VAR and the current variance zone number will be displayed. Press the STEP button to select the proper variance zone as shown in Variance Settings. Press the US/Metric button to save the new variance zone and normal CMTC operation. If the RESET button is held for 10 seconds instead 5 seconds the CMTC will set variance to 8 and enter the fast calibration mode.
COMPASS CALIBRATION PROCEDURE (FAST METHOD)
When the compass is subjected to excessive magnetic fields, the CMTC automatically enters a fast calibration mode where is tries to compensate for the large magnetic shifts.
If the compass is inaccurate, appears to be inaccurate and the CAL is not illuminated the fast calibration mode may be manually entered by using the following procedure.
1.Set the CMTC to Compass/Temperature mode and press the reset button for 10 continuous seconds. Manual activation of the fast calibration is generally not required.
2.Compass variance sets to the default of 8 after the fast calibration is manually activated.
3.Complete the compass variance setting procedure by referring to the Compass Variance Procedure in this section
4.Drive the vehicle in three 360° turns in an area free from large metal objects. If the CAL symbol remains lit after completing this step, the roof panel may need demagnetizing
A magnetic field can adversely affect the compass. Magnetic interference can magnetize the roof panel. Magnetizing can be caused by placing a permanent magnet in contact with the roof panel. Example:
•Magnetic Base Antenna
•Bubble gum flasher lights
Removing magnetic interfering objects will usually restore normal compass operation. If the compass display remains blank while the CAL label is illuminated, then the roof panel requires demagnetizing. To demagnetize use Special Tool 6029 for demagnetizing the roof panel. The demagnetizing procedure will demagnetize the roof and mounting screws in the overhead console. It is important that you follow the instructions below exactly. The mounting screws and the mounting brackets around the compass area are steel, and therefore aid in the demagnetizing of the roof panel.
1.Be sure the ignition switch is in the OFF position before you begin the demagnetize procedure.
2.Plug the demagnetizing tool into a standard 110/115 volt AC outlet, keeping the demagnetizing tool at least 12 inches away from the compass area when plugging it in.
3.Slowly approach and contact the console mounting screw with the plastic coated tip of the tool for at least two seconds.
4.With the demagnetizing tool still energized, slowly back it away from the screw until the tip is at least 12 inches from the screw head.
5.Repeat the last step with all the console mounting screws.
6.After you have pulled at least 12 inches from the last screw, remove the demagnetizing tool from inside vehicle and disconnect it from the electrical outlet.
7.Place an 8 1/2 X 11 inch piece of paper lengthwise on the roof of vehicle directly above compass. The purpose of the paper is to protect the roof panel from scratches and define the area to be demagnetized.
8.Plug in the demagnetizing tool, keeping it at least two feet away from the compass unit.
9.Slowly approach the center of the roof panel at the windshield with the demagnetizing tool plugged in.
10.Contact the roof panel with the tip of the tool. Using slow sweeping motions of 1/2 inch between sweeps. Move the tool approximately four inches either side of the center line and at least 11 inches back from the windshield.
11.With the demagnetizing tool still energized, slowly back away from the roof panel until the tip is at least two feet from the roof before unplugging the tool.
12.Recalibrate compass, refer to the compass calibration procedure in this section.
UNIVERSAL TRANSMITTER TRAINING
1.Turn off the engine.
2.Erase the factory test codes by pressing the two outside buttons. Release the buttons when the red light begins to flash (about 20 seconds).
3.Choose one of the three buttons to train. Place the hand-held transmitter within one inch of the universal transmitter and push the buttons on both transmitters. The red light on the universal transmitter will begin to flash slowly.
4.When the red light on the universal transmitter begins to flash rapidly (this may take as long as 60 seconds), release both buttons. Your universal transmitter is now "trained". To train the other buttons, repeat this stepand this step. Be sure to keep your hand-held transmitter in case you need to retrain the universal transmitter.
To erase the universal transmitter codes, simply hold down the two outside buttons until the red LED begins to flash.
Individual channels cannot be erased. Erasing the transmitter codes will erase ALL programmed codes