Chime/buzzer - Service Information: Other RAM Pickup 2500

CHIME WARNING SYSTEM

The chime warning system operates on battery voltage received through a fuse in the Totally Integrated Power Module (TIPM) on a non-switched fused B(+) circuit so that the system may operate regardless of the ignition switch position. The chime warning system also monitors the ignition switch position so that some chime features are functional only with the ignition switch in the ON position, while others are functional regardless of the ignition switch position.

The chime warning system provides an audible indication to the vehicle operator or occupants under the following conditions

1. Airbag Indicator Warning - The instrument cluster, also known as the Cab Compartment Node (CCN) transducer will generate one short chime when the ignition switch is in the ON position, and an electronic message is received over the Controller Area Network (CAN) data bus from the Occupant Restraint Controller (ORC) requesting airbag indicator illumination. This warning will only occur following completion of the airbag indicator bulb test, and will only occur once during any ignition cycle.
2. Door Ajar Warning - The CCN will generate one short chime when the ignition switch is in the ON position, when the door ajar indicator is illuminated, or when a DOOR(S) OPEN textual message is displayed in the odometer Vacuum Fluorescent Display (VFD) unit of the instrument cluster. This warning indicates that a door is, or multiple doors are not closed or completely latched while the vehicle is moving.
3. Electronic Stability Control Warning - The CCN transducer will generate one short chime when the Electronic Stability Control (ESC) has been manually disabled by the vehicle operator using the ESC traction control switch on the instrument panel.
4. Electronic Stability Control Fault Warning - The CCN transducer will generate one short chime each time the ESC indicator is illuminated in the instrument cluster. This warning indicates a failure condition has been monitored affecting the operation of the ESC related components or circuits. This warning will only occur following completion of the ESC indicator bulb test, and will only occur once during any ignition cycle.
5. Fasten Seat Belt Indicator Warning - The CCN transducer will generate repetitive chimes at a slow rate to announce that the seat belt switch and the ignition switch indicate that the driver side front seat belt is not fastened with the ignition switch in the ON position. The chime warning system also supports the enhanced seatbelt reminder (beltminder) when this feature is enabled. For more information, refer to «INDICATORS, Instrument Cluster , Operation»(ref-457793-S06752428732012030200000) .
6. Head/Park Lamps-On Warning - The CCN transducer will generate repetitive chimes at a fast rate to indicate that inputs from the driver door ajar switch, the headlamp switch, and the ignition switch indicate that the exterior lamps are turned ON with the driver side front door opened and the ignition switch in the OFF position. The chimes will continue to sound until the exterior lamps are turned OFF, the driver side front door is closed, or the ignition switch is turned to the ON position, whichever occurs first.
7. Key-In-Ignition Warning - The CCN transducer will generate repetitive chimes at a fast rate to indicate that inputs from the driver side front door ajar switch, the ignition switch and the key-in ignition circuitry of the Wireless Ignition Node (WIN) indicate that the key is in the ignition with the driver side front door open and the ignition switch in the OFF position. The chimes will continue to sound until the key is removed from the ignition switch, the driver side front door is closed, or the ignition switch is turned to the ON position, whichever occurs first.
8. Low Fuel Indicator Warning - The CCN transducer will generate one short chime when the low fuel indicator is illuminated in the instrument cluster. This warning indicates that the monitored fuel level in the fuel tank is low. This chime will only occur once during any ignition cycle.
9. Low Wash Indicator Warning - The CCN transducer will generate one short chime when the low washer fluid indicator is illuminated in the instrument cluster. This chime will only occur once during any ignition cycle.
10. Overspeed Warning - The CCN transducer will generate one short chime when the vehicle speed is over a pre-programmed speed value. This feature is only enabled on vehicles that have been configured for sale in a Middle East Gulf Coast Country (GCC).
11. Park Brake Reminder - The CCN transducer will generate one short chime to announce that the hardwired input from the park brake switch and an electronic vehicle speed message received over the CAN data bus indicate that the park brake is applied and the vehicle is moving. This chime will repeat each time the input conditions are met.
12. Sentry Key Customer Learn Mode Announcement - The CCN transducer will generate one short chime to confirm that an electronic Customer Learn mode message has been received over the CAN data bus to indicate that the Wireless Ignition Node (WIN) is prepared for programming additional Sentry Key transponders. This chime feature is only active on vehicles sold in a market where Customer Learn programming is an allowed feature.
13. Turn Signal/Hazard Warning Flasher Emulation - The CCN relay will generate repetitive clicks at a slow rate to emulate an electromechanical flasher when the turn signal or hazard warning system are operating. The relay will generate repetitive clicks at a fast rate to indicate that the right or left turn signals are operating with one or more bulbs ineffective. In either case, the clicks will continue until the turn signal and hazard warning systems are turned OFF.
14. Turn Signal On Warning - The CCN transducer will generate repetitive chimes at a slow rate to indicate that a turn signal has been active continuously for 1.6 kilometers (1 mile) with the vehicle speed greater than 22 kilometers-per-hour (15 miles-per hour). Vehicles built for markets other than the United States and Canada have a revised distance threshold of 4 kilometers (2.49 miles) for this feature. The chime will continue until the turn signal input becomes inactive or until the electronic vehicle speed message indicates that the speed is less than 22 kilometers-per-hour (15 miles-per-hour), whichever occurs first. The hazard warning flashers will not activate this chime feature.
15. Warning Indicator Announcement - The CCN transducer will generate one short chime each time the Malfunction Indicator Lamp (MIL) lamp or certain other indicators are illuminated by the instrument cluster circuitry. The MIL and certain other indicators may be illuminated when any critical engine or transmission systems are operating outside of their normal parameters. The instrument cluster monitors electronic messages received over the CAN data bus to determine when to illuminate these indicators.

The CCN provides chime service for all available features in the chime warning system. The CCN relies upon its internal programming, numerous hardwired inputs, and electronic message inputs received from other modules over the CAN and the Local Interface Network (LIN) data buses to provide the chime warning system features. The internal programming of the CCN determines the priority of each chime request input that is received, as well as the rate and duration of each chime that is to be generated.

The hardwired circuits between components related to the chime warning system may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

However, conventional diagnostic methods will not prove conclusive in the diagnosis of the chime warning system or the electronic controls or communication between modules and other devices that provide some features of the chime warning system. The most reliable, efficient, and accurate means to diagnose the chime warning system or the electronic controls and communication related to chime warning system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

PARK ASSIST SYSTEM

The park assist system is active only when the ignition switch is in the ON or START positions, the parking brake is released, the transmission gear selector lever is in either the REVERSE position and the vehicle speed is less than 16 kph (10 mph) or, the DRIVE position and the vehicle speed is less than 14 kph (8 mph) on deceleration, or 18 kph (12 mph) on acceleration. The park assist system is enabled from the factory as a default but can be disabled or enabled using either the manual cut-off switch, integral to the instrument panel switch pod, or by using the personal settings menu of the Electronic Vehicle Information Center (EVIC), if equipped. For more information on EVIC operation, refer to CENTER, Electronic Vehicle Information , Operation .

Reasons for disabling the system include trailer towing, off road use and driving conditions where the tailgate is in the down position. With a trailer attached to the vehicle the audible and visible park assist alerts would be incessant whenever the gear selector lever was in the REVERSE position due to the proximity of the trailer to the rear of the vehicle, as well as operating the vehicle at low speeds with the tailgate in the down position and the gear selector in the DRIVE position. Similarly, operating the vehicle off road may cause the park assist alerts to become distracting due to the proximity of large trees or boulders and the extreme rear approach angles that may be encountered while maneuvering on off road trails or terrain. When the system is disabled, a PARK ASSIST OFF textual message will appear in the Electronic Vehicle Information Center (EVIC) display, if equipped whenever the gear selector lever is in the REVERSE position.

The microprocessor based park assist module is the central component of the park assist system. It supplies voltage to the park assist sensors , receives and analyzes data from the sensors, calculates and communicates the proper display information to the Cab Compartment Node (CCN), performs system diagnostics, and communicates with other electronic modules in the vehicle or with a diagnostic scan tool over the Controller Area Network (CAN) data bus. The module operates on battery voltage received through a fuse in the Junction Block (JB), and is grounded through a take out and eyelet terminal of the body wire harness that is secured by a screw to the left inner D-pillar.

Four ultrasonic park assist sensors in the rear bumper allow the park assist system to locate and identify the proximity of nearby obstacles. These sensors each generate ultrasonic sound pulses when triggered by the park assist module, then signal the module when an echo of the reflected sound pulses is received. The detection distance range from the rear of the vehicle is about 0.3 meters (11.8 inches) to about 2.0 meters (80 inches), and the detection height range from the ground is about 0.2 meters (7.8 inches) to about 0.8 meters (31 inches). The detection area extends somewhat around both rear sides (corners) of the vehicle.

The park assist display, located within the EVIC unit, provides the vehicle operator with a visual and audible warning if the vehicle comes to within about 40 centimeters (31 inches) of a detected object, when the "Sound and Display" are ON. The display is visible to the vehicle operator only when looking forward and an object is detected within the detection zone. The system will also emit a series of short, intermittent, audible beeps and automatically mute the audio system while the park assist audible warning is being generated. The audible warning changes from intermittent beeps to a continuous tone as the vehicle comes to within 30.5 centimeters (12 inches) of a detected object.

When the park assist module monitors a problem in any of the park assist system circuits or components, it stores a fault code or Diagnostic Trouble Code (DTC) in its memory circuit and, sends an electronic message to the EVIC. When a message from the park assist module is received by the EVIC for a fault condition, a SERVICE PARK ASSIST SYSTEM textual message is displayed within the EVIC display.

The hardwired circuits between components related to the park assist system may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

However, conventional diagnostic methods will not prove conclusive in the diagnosis of the park assist system or the electronic controls or communication between modules and other devices that provide some features of the park assist system. The most reliable, efficient, and accurate means to diagnose the park assist system or the electronic controls and communication related to park assist system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

The hard wired circuits between components related to the chime warning system may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

However, conventional diagnostic methods will not prove conclusive in the diagnosis of the chime warning system or the electronic controls or communication between modules and other devices that provide some features of the chime warning system. The most reliable, efficient, and accurate means to diagnose the chime warning system or the electronic controls and communication related to chime warning system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

The following textual messages May appear in the Electronic Vehicle Information Center (EVIC)

1. SERVICE PARK ASSIST - If a service park assist textual message appears in the EVIC display, be certain to confirm the following: The parking brake is not applied. The rear bumper is free of ice, snow, mud or other obstructions that will prevent the system from operating properly. The park assist system is self correcting, please verify that the area of the rear bumper where the sensors are located is not blocked by ice, snow, mud or other obstructions. If the area is blocked, remove the blockage, shift the transmission selector lever into reverse and verify the message is no longer present in the EVIC display. The system may also be corrected when the vehicle is driven at a speed greater than 14 kph (8 mph). NOTE: The presence of jackhammers, large trucks, and other vibrations in the vicinity of the vehicle could impact the performance of the system.
2. PARK ASSIST OFF - If a park assist off textual message appears in the EVIC display, the system may either be manually cut-off or have a hard fault. If the manual cut-off switch is not illuminated further investigation may be needed.

The hard wired circuits between components related to the park assist system may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

However, conventional diagnostic methods will not prove conclusive in the diagnosis of the park assist system or the electronic controls or communication between modules and other devices that provide some features of the park assist system. The most reliable, efficient, and accurate means to diagnose the park assist system or the electronic controls and communication related to park assist system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.