A chime warning system is standard factory-installed equipment. The chime warning system uses an electrome-
chanical transducer and an electromechanical relay that are soldered onto the electronic circuit board inside of the
ElectroMechanical Instrument Cluster (EMIC) (1) to provide audible indications of various vehicle conditions that
may require the attention of the vehicle operator or occupants. The EMIC also includes the hardware and software
necessary to serve as the electronic body control module and is sometimes referred to as the Cab Compartment
Node or CCN.

The Park Assist Display (2) will give out an audible signal when objects are detected starting at 40 cm (16 in.).

The electromechanical transducer generates beep tones and chime tones, while the electromechanical relay gen-
erates click tones to emulate the sounds associated with conventional turn signal and hazard warning flasher oper-
ation. The microprocessor-based EMIC utilizes electronic chime request messages received from other modules in
the vehicle over the Controller Area Network (CAN) data bus along with hard wired inputs to monitor many sensors
and switches throughout the vehicle. In response to those inputs, the circuitry and programming of the EMIC allow
it to control the audible outputs that are produced through its on-board transducer and relay.

The EMIC is capable of producing the following audible outputs:

•

Slow Rate Repetitive Click - Repeated “click” tones that are issued at a slow rate of about 50 clicks per
minute.

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CHIME/BUZZER - SERVICE INFORMATION

•

Fast Rate Repetitive Click - Repeated “click” tones that are issued at a fast rate of more than about 100
clicks per minute.

•

Fixed Duration Beep - A short, sharp, single tactile “beep” tone.

•

Single Chime Tone - A single “chime” tone.

•

Slow Rate Repetitive Chime - Repeated “chime” tones that are issued at a slow rate of about 50 chimes per
minute.

•

Fast Rate Repetitive Chime - Repeated “chime” tones that are issued at a fast rate of about 180 chimes per
minute.

Hard wired circuitry connects the EMIC and the various chime warning system switch and sensor inputs to their
modules and to each other through the electrical system of the vehicle. These hard wired circuits are integral to
several wire harnesses, which are routed throughout the vehicle and retained by many different methods. These
circuits may be connected to each other, to the vehicle electrical system and to the EMIC through the use of a
combination of soldered splices, splice block connectors, and many different types of wire harness terminal con-
nectors and insulators. Refer to the appropriate wiring information. 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.

The EMIC chime warning system circuits and components cannot be adjusted or repaired. If the EMIC circuitry, the
on-board transducer or the relay are damaged or faulty, the EMIC unit must be replaced.

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

CHIME/BUZZER - SERVICE INFORMATION

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