TJ CHIME/BUZZER 8B - 1

CHIME/BUZZER

TABLE OF CONTENTS

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CHIME WARNING SYSTEM DIAGNOSIS AND TESTING - CHIME DESCRIPTION ...... 1 WARNING SYSTEM ...... 3 OPERATION ...... 1

CHIME WARNING SYSTEM circuits are integral to several wire harnesses, which are routed throughout the vehicle and retained by DESCRIPTION many different methods. Refer to the appropriate wiring information. A chime warning system is standard factory-in- The instrument cluster chime warning system cir- stalled equipment on this model. The chime warning cuitry and the integral chime tone generator cannot system uses a single chime tone generator that is be adjusted or repaired. If the instrument cluster or integral to the instrument cluster to provide an audi- the chime tone generator are damaged or faulty, the ble indication of various vehicle conditions that may instrument cluster must be replaced. require the attention of the vehicle operator. The chime warning system includes the following major OPERATION components, which are described in further detail The chime warning system is designed to provide elsewhere in this service information: an audible output as an indication of various condi- • Door Ajar Switch - A door ajar switch is tions that may require the attention or awareness of mounted to each front door hinge pillar. This switch the vehicle operator. The chime warning system com- provides an input to the chime warning system indi- ponents operate on battery voltage received through cating whether the front doors are open or closed. the Ignition-Off Draw (IOD) fuse in the Power Distri- • Ignition Switch - A key-in ignition switch is bution Center (PDC) so that the system may operate integral to the ignition switch. The key-in ignition regardless of the ignition switch position. switch provides an input to the chime warning sys- The chime warning system provides an audible tem indicating whether a key is present in the igni- warning to the vehicle operator under the following tion lock cylinder. conditions: • Instrument Cluster - The instrument cluster • Air Bag Warning - The instrument cluster contains an integral chime tone generator, integrated chime tone generator will generate a single chime circuitry, a central processing unit and the program- tone when the indicator is illuminated for an ming to provide all of the proper chime warning sys- airbag system fault condition. The instrument cluster tem features based upon the monitored inputs. The uses airbag indicator lamp-on and lamp-off message instrument cluster circuitry monitors hard-wired inputs received from the Airbag Control Module switch inputs, as well as message inputs received (ACM) over the Programmable Communications from other vehicle electronic modules on the Pro- Interface (PCI) data bus indicating that the airbag grammable Communications Interface (PCI) data bus indicator should be illuminated for an airbag system network. fault condition. • Left Multi-Function Switch - The exterior • Charging System Warning - The instrument lighting switch is integral to the left multi-function cluster chime tone generator will generate a single switch. The exterior lighting switch provides an chime when the check gauges indicator is illuminated input to the chime warning system indicating when for a charging system fault or a system voltage high the exterior lamps are turned On or Off. warning condition. The instrument cluster uses sys- • Switch - A seat belt switch is inte- tem voltage status message inputs received from the gral to the driver side front seat belt buckle-half Powertrain Control Module (PCM) over the PCI data unit. The seat belt switch provides an input to the bus to illuminate the check gauges indicator for a chime warning system indicating whether the driver charging system fault. This chime feature will only side front seat belt is fastened. occur once in an ignition cycle. Hard wired circuitry connects many of the chime • Driver Door Ajar Warning - The instrument warning system components to each other through cluster chime tone generator will generate repetitive the electrical system of the vehicle. These hard wired chimes at a slow rate to announce that the hard 8B - 2 CHIME/BUZZER TJ CHIME WARNING SYSTEM (Continued) wired inputs from the driver door ajar switch and the • Low Fuel Warning - The instrument cluster ignition switch as well as an engine speed message chime tone generator will generate one chime tone input received from the PCM over the PCI data bus when the low fuel indicator is illuminated by the indicate that the driver door is opened with the igni- instrument cluster. The instrument cluster uses a tion switch in the On position and the engine is not percent tank full message input received from the running. The chimes will continue to sound for a PCM over the PCI data bus indicating that there is duration of about twenty minutes, until the driver less than about one-eighth tank of fuel remaining to door is closed, until the ignition switch is turned to illuminate the low fuel indicator. This chime feature the Off position, or until the engine speed message will only occur once in an ignition cycle. indicates the engine is running, whichever occurs • Low Oil Pressure Warning - The instrument first. cluster chime tone generator will generate repetitive • Engine Coolant Temperature High Warning chimes at a fast rate when the check gauges indica- - The instrument cluster chime tone generator will tor is illuminated for a low oil pressure condition. generate a single chime tone when the check gauges The instrument cluster uses engine speed and oil indicator is illuminated for a high or critical engine pressure message inputs received from the PCM over coolant temperature condition. The instrument clus- the PCI data bus indicating that the engine is run- ter uses engine coolant temperature message inputs ning at greater than 300 rpm and that the oil pres- received from the PCM over the PCI data bus to illu- sure is low to illuminate the check gauges indicator. minate the check gauges indicator for a coolant tem- The chimes will continue to sound for five seconds, perature high condition. This chime feature will only until the engine oil pressure message indicates that occur once in an ignition cycle. the oil pressure is not low, or until the engine speed • Fasten Seat Belt Warning - The instrument message indicates that the engine is running at less cluster chime tone generator will generate repetitive than 300 rpm, whichever occurs first. This chime chimes at a slow rate each time the ignition switch is tone will only occur once in an ignition cycle. turned to the On or Start positions to announce that • Overspeed Warning - The instrument cluster the hard wired inputs from the seat belt switch and chime tone generator will generate repetitive chimes the ignition switch indicate that the driver side front at a slow rate to announce that a vehicle speed mes- seat belt is not fastened. The chimes will continue to sage input received from the PCM over the PCI data sound for a duration of about six seconds, until the bus indicates that the vehicle speed is above 120 driver side front seat belt is fastened, or until the kilometers-per-hour (75 miles-per-hour). The chimes ignition switch is turned to the Off position, which- will continue to sound until the vehicle speed mes- ever occurs first. sage indicates that the vehicle speed is below 120 • Head/Park Lights-On Warning - The instru- kilometers-per-hour (75 miles-per-hour). This feature ment cluster chime tone generator will generate is only enabled on an instrument cluster that has repetitive chimes at a slow rate to announce that the been programmed with a Middle East Gulf Coast hard wired inputs from the driver door ajar switch, Country (GCC) country code. the ignition switch, and the exterior lighting circuitry • Park Reminder - The instrument clus- of the left multi-function switch indicate that the ter chime tone generator will generate ten repetitive exterior lamps are turned On with the driver door chimes at a slow rate to announce that the hard opened and the ignition switch in the Off position. wired input from the park brake switch and a vehicle The chimes will continue to sound for about three speed message input received from the PCM over the minutes or until the exterior lamps are turned Off, PCI data bus indicates that the park brake is applied the driver door is closed, or the ignition switch is and the vehicle is moving. This chime feature will turned to the On position, whichever occurs first. repeat each time the input conditions are met. • Key-In-Ignition Warning - The instrument • Passenger Door Ajar Warning - The instru- cluster chime tone generator will generate repetitive ment cluster chime tone generator will generate chimes at a slow rate to announce that the hard three sets of two chimes at a slow rate to announce wired inputs from the driver door ajar switch, the that the hard wired inputs from the passenger door ignition switch, and the key-in ignition circuitry of ajar switch and the ignition switch as well as an the ignition switch indicate that the key is in the engine speed message input received from the PCM ignition lock cylinder with the driver door opened over the PCI data bus indicate that the passenger and the ignition switch in the Off position. The door is opened with the ignition switch in the On chimes will continue to sound until the key is position and the engine is not running. This chime removed from the ignition lock cylinder, the driver feature will repeat each time the input conditions are door is closed, or the ignition switch is turned to the met. On position, whichever occurs first. TJ CHIME/BUZZER 8B - 3 CHIME WARNING SYSTEM (Continued)

• Sentry Key Immobilizer System “Customer rate and duration of each chime that is to be gener- Learn” Mode Announcement - This chime feature ated. is only active on vehicles equipped with the optional The hard wired chime warning system inputs to Sentry Key Immobilizer System (SKIS) and sold in the instrument cluster, as well as other hard wired markets where the optional “Customer Learn” pro- circuits for this system may be diagnosed and tested gramming feature is available. The instrument clus- using conventional diagnostic tools and procedures. ter chime tone generator will generate one chime to However, conventional diagnostic methods may not announce that a status message input received from prove conclusive in the diagnosis of the instrument the Sentry Key Immobilizer Module (SKIM) over the cluster or the PCI data bus network. The most reli- PCI data bus indicates that the SKIS is in the “Cus- able, efficient and accurate means to diagnose the tomer Learn” mode, which is used for programming instrument cluster and the PCI data bus network additional sentry key transponders. inputs for the chime warning system requires the use • Turn Signal On Warning - The instrument of a DRBIII௡ scan tool. Refer to the appropriate diag- cluster chime tone generator will generate repetitive nostic information. chimes at a slow rate to announce that the hard wired input for the right or left turn signal indicator DIAGNOSIS AND TESTING - CHIME WARNING as well as vehicle distance and speed message inputs SYSTEM received from the PCM over the PCI data bus indi- The chime warning system features driven by hard cate that a turn signal has been active continuously wired inputs to the instrument cluster may be diag- for 1.6 kilometers (1 mile) with the vehicle speed nosed and tested using conventional diagnostic tools greater than 22 kilometers-per-hour (15 miles-per and procedures. However, conventional diagnostic hour). Vehicles built for markets other than the methods may not prove conclusive in the diagnosis of United States and Canada have a revised distance the chime warning system features driven by mes- threshold of 4 kilometers for this feature. The chime sage inputs to the instrument cluster over the Pro- will continue until the turn signal input becomes grammable Communications Interface (PCI) data bus inactive, the status changes, or until the vehicle network. The most reliable, efficient and accurate speed message indicates that the speed is less than means to diagnose the instrument cluster and the 22 kilometers-per-hour (15 miles-per-hour), which- PCI data bus network inputs for the chime warning ever occurs first. The hazard warning flashers will system requires the use of a DRBIII௡ scan tool. Refer not activate this chime feature. to the appropriate diagnostic and wiring information. The instrument cluster provides chime service for all available features in the chime warning system. WARNING: ON VEHICLES EQUIPPED WITH AIR- The instrument cluster relies upon its internal pro- BAGS, DISABLE THE AIRBAG SYSTEM BEFORE gramming, hard wired inputs from numerous ATTEMPTING ANY , STEERING switches, and electronic message inputs received COLUMN, OR INSTRUMENT PANEL COMPONENT from other electronic modules over the PCI data bus DIAGNOSIS OR SERVICE. DISCONNECT AND ISO- network. Upon receiving the proper inputs, the LATE THE BATTERY NEGATIVE (GROUND) CABLE, instrument cluster activates the integral chime tone THEN WAIT TWO MINUTES FOR THE AIRBAG SYS- generator to provide the audible chime to the vehicle TEM CAPACITOR TO DISCHARGE BEFORE PER- operator. The chime tone generator in the instrument FORMING FURTHER DIAGNOSIS OR SERVICE. THIS cluster is capable of producing single chime tones, or IS THE ONLY SURE WAY TO DISABLE THE AIRBAG repeated chime tones at two different rates: about SYSTEM. FAILURE TO TAKE THE PROPER PRE- fifty chime tones per minute, or about 180 chime CAUTIONS COULD RESULT IN ACCIDENTAL AIR- tones per minute. The internal programming of the BAG DEPLOYMENT AND POSSIBLE PERSONAL instrument cluster determines the priority of each INJURY. chime request input that is received, as well as the 8B - 4 CHIME/BUZZER TJ CHIME WARNING SYSTEM (Continued)

CONDITION POSSIBLE CAUSES CORRECTION

NO SEAT BELT WARNING 1. Seat belt switch ground 1. Check for continuity between the ground circuit CHIME WITH SEAT BELT circuit open. of the floor wire harness connector for the seat UNBUCKLED, BUT OTHER belt switch and a good ground. Repair open CHIME FEATURES OK ground circuit, if required.

2. Seat belt switch sense 2. Check for continuity between the seat belt circuit open. switch sense circuit of the floor wire harness connector for the seat belt switch and the instrument panel wire harness instrument cluster connector. Repair the open seat belt switch sense circuit, if required. 3. Faulty seat belt switch. 3. Check for continuity between the ground circuit and the seat belt switch sense circuit of the seat belt switch pigtail connector. There should be continuity with the seat belt unbuckled. Replace the faulty seat belt, if required.

SEAT BELT WARNING 1. Seat belt switch sense 1. With the floor wire harness connector for the CHIME WITH SEAT BELT circuit shorted. seat belt switch and the instrument panel wire BUCKLED harness instrument cluster connector disconnected, there should be no continuity between the seat belt switch sense circuit and a good ground. Repair the shorted seat belt switch sense circuit, if required.

2. Faulty seat belt switch. 2. Check for continuity between the ground circuit cavity and the seat belt switch sense circuit of the seat belt switch pigtail connector. There should be no continuity with the seat belt buckled. Replace the faulty seat belt, if required.

NO KEY-IN IGNITION 1. Driver door ajar switch 1. Check for continuity between the driver door WARNING CHIME, BUT sense circuit open. ajar switch sense circuit of the connector for the OTHER CHIME FEATURES driver door ajar switch and the cross body wire OK harness ignition switch connector. Repair the open driver door ajar switch sense circuit, if required. 2. Key-in ignition switch 2. Check for continuity between the key-in ignition sense circuit open. switch sense circuit of the cross body wire harness ignition switch connector and the instrument panel wire harness instrument cluster connector. Repair the open key-in ignition switch sense circuit, if required. 3. Ignition switch ground 3. Check for continuity between the ground circuit circuit open. cavity of the cross body wire harness ignition switch connector and a good ground. Repair the open ground circuit, if required 4. Faulty ignition switch. 4. Check for continuity between the ground circuit terminal and the key-in ignition switch sense circuit terminal in the ignition switch connector. There should be continuity with a key in the ignition lock cylinder. Replace the faulty ignition switch, if required. TJ CHIME/BUZZER 8B - 5 CHIME WARNING SYSTEM (Continued)

CONDITION POSSIBLE CAUSES CORRECTION

NO HEADLAMPS-ON 1. Driver door ajar switch 1. Check for continuity between the driver door WARNING CHIME, BUT sense circuit open. ajar switch sense circuit of the connector for the OTHER CHIME FEATURES driver door ajar switch and the instrument panel OK wire harness instrument cluster connector. Repair the open driver door ajar switch sense circuit, if required.

2. Headlamp switch output 2. Check for continuity between the headlamp circuit open. switch output circuit of the instrument panel wire harness instrument cluster connector and the park lamp feed circuit of the cross body wire harness left multi-function switch connector. Repair the open headlamp switch output circuit, if required. 3. Faulty multi-function 3. Check for continuity between the B(+) circuit switch. terminal and the park lamp feed circuit terminal in the left multi-function switch connector. There should be continuity with the headlamp switch in the On position. Replace the faulty left multi- function switch, if required.

NO CHIMES AND OTHER 1. Instrument cluster ground 1. Check for continuity between the ground circuit INSTRUMENT CLUSTER circuit open. of the instrument panel wire harness instrument FEATURES ERRATIC OR cluster connector and a good ground. Repair the DISABLED open ground circuit, if required.

2. Instrument cluster fused 2. Check for battery voltage at the B(+) circuit of B(+) circuit open. the instrument panel wire harness instrument cluster connector. Repair the open fused B(+) circuit, if required. 3. Instrument cluster fused 3. With the ignition switch in the On position, ignition switch output check for battery voltage at the fused ignition (run-start) circuit open. switch output (run-start) circuit of the instrument panel wire harness instrument cluster connector. Repair the open fused ignition switch output (run-start) circuit, if required. 4. Faulty instrument cluster. 4. Replace the faulty instrument cluster, if required.

NO CHIMES, BUT ALL 1. Faulty instrument cluster. 1. Replace the faulty instrument cluster, if OTHER INSTRUMENT required. CLUSTER FEATURES OK