Chime & Buzzer: Other Dodge Caravan IV

HIGH SPEED WARNING - EXPORT

The chime will sound, acting as a warning to the driver that the vehicle speed has exceeded 120 +/- 3 Kp/h (75 +/- 2 mph).

Refer to BODY DIAGNOSTIC PROCEDURES diagnosis and testing with a scan tool.

PARK ASSIST SYSTEM

The Park Assist System is an electronic parking aid that alerts the driver to obstacles which are located immediately behind the vehicle. Objects are sensed using ultrasonic sound waves. When an object is detected, the system will give the driver visual and audible warnings. The system is customer programmable through the Electronic Vehicle Information Center (EVIC) but will be enabled from the factory as a default.

The major components of the park assist system are

1. Park Assist Module - supplies voltage to the object detection sensors and park assist display. It triggers the sensors, analyzes the echo delay times and calculates obstacle distances. It sends display information to the park assist display, performs system diagnostics, and communicates via the Programmable Communication Interface (PCI) date bus network.
2. Park Assist Sensors - there are four sensors located in the rear bumper that generate ultrasonic pulses when triggered by the park assist module. The sensors signal the park assist module when reflected ultrasonic pulses are received.
3. Park Assist Display - there are sixteen Light Emitting Diode (LED) indicators which provide indication of relative distance to obstacles. When the system is engaged and no obstacles are detected, the two outermost yellow LED's are lit at reduced brightness to show the system is working. As the distance to a detected obstacle decreases, more yellow LED's towards the center of the display illuminate.

For diagnosis and testing of the park assist system, use a scan tool and the appropriate body diagnostic information.

When the vehicle speed sensor sees 120 +/- 3 Km/h (75 +/- 2 mph), it sends a PCI data bus message to the Body Control Module (BCM). The BCM then turns on the chime to let the driver know that the vehicle has reached a speed greater than 120 +/- 3 Km/h (75 +/- 2 mph). This audible message will continue until the vehicle is slowed below the predetermined speed.

The Park Assist System display activates an audible tone that changes from intermittent to continuous as the final two Light Emitting Diodes (LED's) are illuminated on one side or both sides of the display.

The system detection length from the rear of the vehicle is 0.3 meters to 1.5 meters. This area extends around the rear side of the vehicle. The system detection height from the ground is 0.2 meters to about 1.5 meters. The radio mutes when the system activates its audible tone.

When the driver selects Reverse the system scans for objects behind the vehicle using four sensors located in the rear bumper. A warning display above the rear window provides both visible and audible warnings indicating the range of the object.

The system is active only when the transmission gear selector is in reverse for vehicle speeds less than 16 Km/h (10 mph). If the vehicle's Parking/Emergency Brake is applied, the system is deactivated.

The display contains two sets of yellow and red Light Emitting Diode's (LED's) that the driver can see as they look over their shoulder while backing up. Each side of the vehicle has its own warning LED's. The system provides a visual warning by illuminating one or more yellow LED's as the vehicle gets closer to the object. As the vehicle continues to approach the object, one red LED is illuminated and the system emits a series of short beeps. The tone will remain constant and both red LED's are illuminated once the vehicle is within 12 inches (30.5 cm) of the object.

The system can be turned ON or OFF through the Electronic Vehicle Information Center (EVIC) when the vehicle is in PARK. If the park assist system is turned OFF, a single chime will sound and the EVIC will display the following message "REAR PARK ASSIST OFF", when the vehicle is in reverse.

1. Ensure that the rear bumper is free of dirt and debris to keep the system operating properly.
2. Jackhammers, large trucks, and other vibrations could affect the performance of the system.
3. Ensure that the parking brake is not applied.

If "Service Park Assist System" appears in the EVIC after making sure the rear bumper is clean, proceed to diagnose the system using a scan tool and the appropriate diagnostic information.

WARNING

On vehicles equipped with airbags, disable the airbag system before attempting any steering wheel, steering column, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to take the proper precautions could result in accidental airbag deployment, personal injury, or death.

NO TONE WHEN IGNITION SWITCH IS TURNED ON AND DRIVER'S SEAT BELT IS NOT BUCKLED.

1. Using a DRB lll(R) scan tool, actuate chime (BCM actuates).
2. Using a voltmeter, check for voltage: BCM has two battery feeds at pin 1 and pin 5 of the 6-way connector. Pin 5 of the (BX2) 32 way connector of the BCM for ignition feed. Check voltage (PX2) connector, pin 34 for 12v. If voltage OK, go to step step 3 . If NO voltage repair as necessary. Refer to appropriate SYSTEM WIRING DIAGRAMS article. The wiring information includes wiring diagrams, proper wire and connector repair procedures, further details on wire harness routing and retention, as well as pin-out and location views for the various wire harness connectors, splices and grounds.
3. Check drivers seat belt buckle switch input (from Occupant Restraint Controller (ORC) for a closed circuit when not buckled. If input not seen, look for open in wiring or switch. The switch is grounded when belt is not buckled.
4. Verify Programmable Communication Interface (PCI) data bus communication between ORC and BCM.

NO FASTEN SEAT BELT LAMP WHEN IGNITION SWITCH IS TURNED ON.

1. Check for burned out lamp.
2. Using a voltmeter check for voltage at the cluster connector: Pin 2 of the mechanical instrument cluster for battery feed. Pin 11 of the mechanical instrument cluster for ignition voltage.
3. Repair as necessary.

FASTEN SEAT BELT LAMP OR TONE CONTINUES FOR MORE THAN 10 SECONDS AFTER SEAT BELTS ARE FASTENED AND DRIVER'S DOOR IS CLOSED.

Refer to BODY DIAGNOSTIC PROCEDURES .

NO TONE WHEN PARK OR HEADLAMPS ARE ON AND DRIVER'S DOOR IS OPEN.

Make sure ignition is in lock position with the key removed.

1. Check the BCM DTC's and BCM sensors to verify the door is open. Repair as necessary.
2. Actuate Chime (BCM actuates).
3. Inspect BCM connectors and wires for proper connection.
4. Measure with a voltmeter the voltage (12v) on BCM connector (PX2) pin 34 with harness connected.
5. Check BCM sensors to verify headlamp switch position.

Scheme 9

The Park Assist Display is located in the rear of vehicle, over the rear window in the headliner. See (Scheme 9) (Scheme 10). It is a molded plastic unit housing Light Emitting Diodes (LED's) and a chime module. Located in the rear of the vehicle for easy visual reference when the driver is backing up.

Scheme 10

The display is used to alert the driver of any obstacles detected in the rear of the vehicle. The chime or audible signal also comes from the display unit.