Message Systems: Other Dodge Caravan IV

OVERHEAD CONSOLE

Any diagnosis of the overhead console should begin with the use of the DRB III(R) diagnostic tool. For information on the use of the DRB III(R), refer to BODY DIAGNOSTIC PROCEDURES .

If the problem with the overhead console is an inaccurate or dashed (- -) display, refer to SELF-DIAGNOSTIC TEST . If the problem with the overhead console is incorrect Vacuum Fluorescent Display (VFD) dimming levels, use a DRB III(R) scan tool and the proper diagnostic procedures information to test for the correct dimming message inputs being received from the Body Control Module (BCM) or Front Control Module (FCM) over the Programmable Communications Interface (PCI) data bus circuit. If the problem is a no-display condition, use the following procedures.

Inspect the related wiring harness connectors for broken, bent, pushed out, or corroded terminals. Refer to appropriate SYSTEM WIRING DIAGRAMS article.

1. Check the fused B(+) fuse in the integrated power module. If OK, go to step 2 . If not OK, repair the shorted circuit or component as required and replace the faulty fuse.
2. Check for battery voltage at the fused B(+) fuse in the integrated power module. If OK, go to step 3 . If not OK, repair the open fused B(+) circuit to the fused B(+) fuse in the integrated power module as required.
3. Check the fused ignition switch output (run/start) fuse in the integrated power module. If OK, go to step 4 . If not OK, repair the shorted circuit or component as required and replace the faulty fuse.
4. Turn the ignition switch to the On position. Check for battery voltage at the fused ignition switch output (run/start) fuse in the integrated power module. If OK, go to step 5 . If not OK, repair the open fused ignition switch output (run/start) circuit to the ignition switch as required.
5. Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Remove the overhead console. Check for continuity between the ground circuit cavity of the roof wire harness connector for the electronics module and a good ground. There should be continuity. If OK, go to step 6 . If not OK, repair the open ground circuit as required.
6. Connect the battery negative cable. Check for battery voltage at the fused B(+) circuit cavity of the roof wire harness connector for the electronics module. If OK, go to step 7 . If not OK, repair the open fused B(+) circuit to the fused B(+) fuse in the integrated power module as required.
7. Turn the ignition switch to the On position. Check for battery voltage at the fused ignition switch output (run/start) circuit cavity of the roof wire harness connector for the electronics module. If OK, refer to «SELF-DIAGNOSTIC TEST»(ref-248924-S36052075952007022700000) . If not OK, repair the open fused ignition switch output (run/start) circuit to the fuse in the integrated power module as required.

COMPASS DEMAGNETIZING

A degaussing tool (Special Tool 6029) is used to demagnetize, or degauss, the overhead console forward mounting screw and the roof panel above the overhead console. Equivalent units must be rated as continuous duty for 110/115 volts and 60 Hz. They must also have a field strength of over 350 gauss at 7 millimeters (0.25 inch) beyond the tip of the probe.

To demagnetize the roof panel and the overhead console forward mounting screw, proceed as follows

Scheme 3

Scheme 4

1. Be certain that the ignition switch is in the Off position, before you begin the demagnetizing procedure.
2. Connect the degaussing tool to an electrical outlet, while keeping the tool at least 61 centimeters (2 feet) away from the compass unit. (Scheme 3)
3. Slowly approach the head of the overhead console forward mounting screw with the degaussing tool connected.
4. Contact the head of the screw with the plastic coated tip of the degaussing tool for about two seconds.
5. With the degaussing tool still energized, slowly back it away from the screw. When the tip of the tool is at least 61 centimeters (2 feet) from the screw head, disconnect the tool.
6. Place a piece of paper approximately 22 by 28 centimeters (8.5 by 11 inches), oriented on the vehicle lengthwise from front to rear, on the center line of the roof at the windshield header. (Scheme 4) The purpose of the paper is to protect the roof panel from scratches, and to define the area to be demagnetized.
7. Connect the degaussing tool to an electrical outlet, while keeping the tool at least 61 centimeters (2 feet) away from the compass unit.
8. Slowly approach the center line of the roof panel at the windshield header, with the degaussing tool connected.
9. Contact the roof panel with the plastic coated tip of the degaussing tool. Be sure that the template is in place to avoid scratching the roof panel. Using a slow, back-and-forth sweeping motion, and allowing 13 millimeters (0.50 inch) between passes, move the tool at least 11 centimeters (4 inches) to each side of the roof center line, and 28 centimeters (11 inches) back from the windshield header.
10. With the degaussing tool still energized, slowly back it away from the roof panel. When the tip of the tool is at least 61 centimeters (2 feet) from the roof panel, disconnect the tool.
11. Calibrate the compass and adjust the compass variance «(Refer to ELECTRICAL/OVERHEAD CONSOLE - STANDARD PROCEDURE)»(ref-248924-S06918403662007022700000).

ELECTRONIC VEHICLE INFORMATION CENTER

Electronic Vehicle Information Center (EVIC) data is obtained from the Body Control Module (BCM) on the Programmable Communications Interface (PCI) Data Bus circuit. The EVIC will display dashes (- -) for any of the screens it did not receive the bus messages. The label corresponding to the missing information will be lit. If no EVIC data is displayed, check the PCI Data Bus circuit communications and the BCM. If the dimming level is improper check the PCI Data Bus circuit.

The use of a DRBIII(R) scan tool and the proper diagnostic procedures information are recommended for further testing of the EVIC module and the PCI data bus circuit. Perform the SELF-DIAGNOSTIC TEST before replacing the EVIC module (Refer to ELECTRICAL/OVERHEAD CONSOLE - DIAGNOSIS AND TESTING) .

EVIC PROGRAMMING MODE

Some vehicles are equipped with a Electronic Vehicle Information Center (EVIC) equipped overhead console. The Electronic Vehicle Information Center (EVIC) provides the vehicle operator with a user interface, which allows the selection of several optional customer programmable electronic features to suit individual preferences. The EVIC must be placed into its programming mode in order to view or change the programmable features. To enter the EVIC programming mode and to view or change the selected programmable features options, proceed as follows

1. Turn the ignition switch to the On position.
2. Depress and release the Menu push button. The first item in the programmable features menu list will appear in the EVIC display.
3. Momentarily depress and release the Menu push button to step through the programmable features list. Each programmable feature and its currently selected option will appear on the EVIC display in the sequence shown in the Programmable Features list that follows.
4. Momentarily depress and release the Step push button to step through the available options for the programmable feature being displayed.
5. The option that last appears in the display with a programmable feature before exiting the programming mode, becomes the newly selected programmable feature option.
6. The EVIC exits the programming mode and returns to its normal operating mode when the C/T push button is depressed or when the end of the programmable features menu list is reached, whichever occurs first.

PROGRAMMABLE FEATURES

Note. Tire pressure monitoring (TPM) system information is not covered in this article. Refer to TIRE PRESSURE MONITORING for detailed tire pressure monitoring system information.

1. LANGUAGE? - The options include English, Francaise, Deutsch, Italiana, or Espanol. The default is English. All EVIC display nomenclature, including the trip computer functions, warning messages and the programmable features appear in the selected language.
2. DISPLAY U.S. OR METRIC? - The options include U.S. and M. The default is U.S. This feature toggles the trip computer temperature, fuel economy and odometer display readings between U.S. and metric units of measure. It also changes the odometer display in the instrument cluster.
3. SERVICE INTV. = - The options include from 3200 to 12000 kilometers in 800 kilometer increments (2000 to 7500 miles in 500 mile increments). The default is 12000 kilometers (7500 miles). The selected distance becomes the interval at which the Perform Service warning message will be displayed by the EVIC. If a new distance is selected, a second programmable feature appears, RESET SERVICE DISTANCE? - The options include No and Yes. The default is Yes. When Yes is selected, the accumulated distance since the last previous Perform Service warning message will be reset to zero because the service interval has been changed. When No is selected, the distance until the next Perform Service warning message is reduced by the accumulated distance since the last previous message.
4. USE FACTORY SETTINGS? - The options include Yes and No. The default is Yes. When yes is selected all the programmable features will return to there defaults and the rest of the programmable features will not be displayed. If No is selected the rest of the programmable features will be displayed at there current chosen values. This feature will automatically return to the Yes default under two conditions. First, if no programmable features are changed from there defaults. Second, if all the programmable features equal there defaults.
5. AUTO DOOR LOCKS? - The options include Yes and No. The default is Yes. When Yes is selected, all doors and the liftgate lock automatically when vehicle speed reaches 25 kilometers-per-hour (15 miles-per-hour). If YES is selected, a second programmable feature appears, AUTO UNLOCK ON EXIT? - The options again include Yes and No. The default is No. When Yes is selected, following each Auto Door Lock event all doors and the liftgate will automatically unlock when the driver door is opened, if the vehicle is stopped and the transmission gear selector is in Park or Neutral. The Auto Door Unlock event will only occur once following each Auto Door Lock event.
6. REMOTE UNLOCK - The options include Driver Door 1st and All Doors. The default is Driver Door 1st. When Diver Door 1st is selected, only the driver door unlocks when the Unlock button of the Remote Keyless Entry (RKE) transmitter is depressed once. The Unlock button of the RKE transmitter must be depressed twice to unlock all doors. When All Doors is selected, all doors unlock when the Unlock button of the RKE transmitter is depressed once.
7. REMOTE LINKED TO MEMORY? - This programmable feature only applies to vehicles equipped with the optional memory / heated system. The options include Yes and No. The default is No. When Yes is selected, the memory system will recall the Driver 1 or Driver 2 memory settings assigned to the RKE transmitter being used to unlock the vehicle. When No is selected, the memory system will only recall memory settings when the Driver 1 or Driver 2 push buttons of the memory switch on the driver side front door trim panel are depressed.
8. SOUND HORN ON LOCK? - The options include Yes and No. The default is No. When Yes is selected, a short horn chirp will provide an audible confirmation when the RKE receiver recognizes a valid Lock signal from an RKE transmitter. When No is selected, no horn chirp will occur with the RKE Lock event. This feature may be selected independent of the FLASH LIGHTS WITH LOCKS? programmable feature.
9. FLASH LIGHTS WITH LOCKS? - The options include Yes and No. The default is Yes. When Yes is selected, a single flash of the hazard warning lamps will provide an optical confirmation when the RKE receiver recognizes a valid Lock signal from an RKE transmitter, and two flashes of the same lamps will occur when the RKE receiver recognizes a valid Unlock signal from an RKE transmitter. When No is selected, no lamp flash will occur with the RKE Lock or Unlock event. This feature may be selected independent of the SOUND HORN ON LOCK? programmable feature.
10. HEADLAMP DELAY = - The options include Off, 30 Sec, 60 Sec, and 90 Sec. The default is 90 Sec. When a time interval is selected, the headlamps will remain on for that length of time when the headlamps are turned off after the ignition is turned off, or if the Auto mode is selected on vehicles with the Auto Headlamps option. When Off is selected, the headlamp delay feature is disabled.
11. HEADLAMPS ON WITH WIPERS? - This programmable feature only applies to vehicles equipped with the optional Auto Headlamps. The options include Yes and No. The default is No. When Yes is selected, the headlamps will turn on automatically when the windshield wipers are turned on. The headlamps will turn off when the wipers are turned off, as long as the headlamp switch is in the Auto or Off positions. When No is selected, the headlamps will only turn on if manually selected or if the Auto mode is selected and the outside ambient light levels dictate that they should be on.
12. POWER ACCESSORY DELAY? - The options include Yes and No. The default is Yes. When No is selected, the accessory powered components will turn off automatically when the ignition key is turned off. When Yes is selected, the accessory powered components will remain on for 45 seconds when the ignition key is turned off.

COMPASS MINI-TRIP COMPUTER

Any diagnosis of the compass mini-trip computer should begin with the use of the DRB III(R) diagnostic tool. For information on the use of the DRB III(R), refer to BODY DIAGNOSTIC PROCEDURES .

Compass Mini-Trip Computer (CMTC) data is obtained from the Body Control Module (BCM) on the Programmable Communications Interface (PCI) Data Bus circuit. The CMTC will display dashes (- -) for any of the screens it did not receive the bus messages. The label corresponding to the missing information will be lit. If no CMTC data is displayed, check the PCI Data Bus circuit communications and the BCM. If the dimming level is improper check the PCI Data Bus circuit.

UNIVERSAL TRANSMITTER

If both the Universal Transmitter and the Electronic Vehicle Information Center (EVIC) are inoperative, (Refer to ELECTRICAL/OVERHEAD CONSOLE/ELECTRONIC VEHICLE INFO CENTER - DIAGNOSIS AND TESTING). If the Universal Transmitter is inoperative, but the EVIC is operating normally, retrain the Transmitter with a known good transmitter (Refer to ELECTRICAL/OVERHEAD CONSOLE/UNIVERSAL TRANSMITTER - STANDARD PROCEDURE - SETTING TRANSMITTER CODES). If the unit is still inoperative, test the universal transmitter with the Radio Frequency Detector special tool as described below. (Scheme 5)

1. Turn the Radio Frequency (RF) Detector ON. A "chirp" will sound and the green power LED will light. If the green LED does not light, replace the battery.
2. Hold the RF detector within one inch of the TRAINED universal transmitter and press any of the transmitters buttons.
3. The red signal detection LEDs will light and the tool will beep if a radio signal is detected. Repeat this test three times.

Scheme 5

SETTING TRANSMITTER CODES

1. Turn off the engine.
2. Erase the codes by pressing the two outside buttons. Release the buttons when the display confirms the operation (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.
4. Release both buttons. Your universal transmitter is now "trained". To train the other buttons, repeat step 3 and step 4 . Be sure to keep your hand-held transmitter in case you need to retrain the universal transmitter.

ERASING TRANSMITTER CODES

To erase the universal transmitter codes, simply hold down the two outside buttons until the display confirms the operation.

Note. Individual channels cannot be erased. Erasing the transmitter codes will erase ALL programmed codes.

AMBIENT TEMPERATURE SENSOR

1. Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Disconnect the ambient temperature sensor wire harness connector.
2. Measure the resistance of the ambient temperature sensor. At room temperature (approx. 68°F), the sensor resistance should be between 10-13 Kilohms. The sensor resistance should be between these two values at 68°F. If the resistance is out of range replace the ambient temperature sensor.

AMBIENT TEMPERATURE SENSOR CIRCUIT

1. Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Disconnect the ambient temperature sensor wire harness connector and the Powertrain Control Module (PCM) wire harness connector.
2. Connect a jumper wire between the two terminals in the body half of the ambient temperature sensor wire harness connector.
3. Check for continuity between the sensor return circuit and the ambient temperature sensor signal circuit cavities of the PCM wire harness connector. There should be continuity. If OK, go to step 4 . If not OK, repair the open sensor return circuit or ambient temperature sensor signal circuit to the ambient temperature sensor as required.
4. Remove the jumper wire from the body half of the ambient temperature sensor wire harness connector. Check for continuity between the sensor return circuit cavity of the PCM wire harness connector and a good ground. There should be no continuity. If OK, go to step 5 . If not OK, repair the shorted sensor return circuit as required.
5. Check for continuity between the ambient temperature sensor signal circuit cavity of the PCM wire harness connector and a good ground. There should be no continuity. If OK, «(Refer to ELECTRICAL/OVERHEAD CONSOLE - DIAGNOSIS AND TESTING)»(ref-248924-S03951252332007022700000) to determine the cause. If not OK, repair the shorted ambient temperature sensor signal circuit as required.