Principles of Operation - Part 2

Principles of Operation - Part 2

Principles of Operation - Part 1

System Warnings

The system warnings alert the operator to possible problems or malfunctions in the vehicle operating systems. The message center displays the last selected feature if there are no more warning messages. This allows the operator full functionality of the message center after acknowledgement of the warning message by pressing the RESET button and clearing the message. The warning messages are divided into 4 categories:

- They cannot be cleared until the condition is corrected.
- They reappear on the display 10 minutes from the reset if the condition has not been corrected.
- They do not reappear until an ignition OFF-ON cycle has been completed.
- They reappear if the condition clears then reoccurs within the same ignition cycle ON-OFF cycle.

The warning display that cannot be reset is:

- DOOR AJAR

The warning messages that reoccur after 10 minutes are:

- CHECK CHARGING SYSTEM
- FUEL LEVEL LOW
- PARK BRAKE ENGAGED
- CHECK BRAKE SYSTEM

The warning messages that display whenever the ignition switch is turned from the OFF position to the ON position are:

- CHECK PARK AID
- BRAKE FLUID LEVEL LOW
- CHECK HEADLAMP
- CHECK HIGHBEAM
- CHECK TURN LAMP
- WASHER FLUID LOW LEVEL
- OIL CHANGE REQUIRED
- ENGINE OIL CHANGE SOON

The warning messages that return after a condition has cleared then reoccurs within the same ignition ON-OFF cycle are:

- LIFTGATE/GLASS AJAR
- LOW TIRE PRESSURE
- TIRE MONITOR FAULT
- TIRE SENSOR FAULT
- TRAIN TIRES
- TIRES TRAINED
- TIRES NOT TRAINED

Outside Air Temperature Sensor (Base Instrument Cluster without Electronic Automatic Temperature Control [EATC])

The base instrument cluster receives the outside air temperature data from the outside air temperature sensor. This data is then displayed on the message center. The outside air temperature sensor is located on the radiator core support behind the front grill assembly and is fastened with a pin-type retainer. If equipped with a high series instrument cluster, the outside air temperature data from the outside air temperature sensor is displayed in the electronic automatic temperature control (EATC) module. Refer to Heating and Air Conditioning to continue diagnosis of the outside air temperature system. Heating and Air Conditioning

Compass

The compass heading is displayed as one of N, NE, E, SE, S, SW, W and NW in the message center display. The compass reading may be affected when you drive near large buildings, bridges, power lines and powerful broadcast antenna. Magnetic or metallic objects placed in, on or near the vehicle may also affect compass accuracy. The compass sensor module is mounted behind the interior rear view mirror.

Warning Chimes

The instrument cluster uses different chimes to alert the driver of various vehicle conditions as follows:

- safety belt warning (repetitive chime)
- Belt-Minder warning (repetitive chime after a delay and after the safety belt chime is completed)
- key-in-ignition warning (repetitive chime)
- headlamps on warning (repetitive chime)
- turn signal on warning (single tone chime after 2.4 km [1.5 miles])
- turn signal tone (tic-tock chime)
- parking brake warning (repetitive chime)
- air bag secondary warning chime (repetitive chime)
- message center general tone (single tone)

Safety Belt Warning Chime

The safety belt warning chime warns that the safety belt is not fastened. The safety belt warning chime sounds when the driver or passenger safety belt is not fastened and the ignition key is turned from the OFF/LOCK or ACC to the ON or START position.

The safety belt warning chime stops sounding when the safety belt is fastened, when the ignition key is turned from the ON or START position to the OFF/LOCK or ACC position, or when the chime has sounded for approximately 6 seconds.

The safety belt warning chime inputs are:

- ignition switch position.
- driver or passenger safety belt switch data communicated by the restraint control module (RCM) to the instrument cluster through the controller area network (CAN).

Belt-Minder

The Belt-Minder is configurable. To configure using a diagnostic tool, Programming and Relearning. To configure without using a diagnostic tool, refer to Belt-Minder Deactivating/Activating Service and Repair.

The Belt-Minder feature supplements the current safety belt warning function. The Belt-Minder is enabled after the current safety belt warning is complete. The Belt-Minder reminds the driver that the driver or passenger safety belt is unbuckled by intermittently sounding a chime and illuminating the safety belt warning lamp in the instrument cluster once the vehicle speed has exceeded 5 km/h (3 mph). While activated, the Belt-Minder alternates the chime and indicator from on for 6 seconds to off for 60 seconds.

NOTE: The Belt-Minder is disabled for 1 ignition switch ON cycle if the safety belt is buckled then unbuckled during that specific cycle.

Key-In-Ignition Warning Chime

The key-in-ignition warning chime warns that the key is still in the ignition lock cylinder when the driver door is ajar. The key-in-ignition warning chime sounds when the driver door is ajar, the key is in the ignition lock cylinder and in the OFF/LOCK or ACC position.

The key-in-ignition warning chime stops sounding when the driver door is closed, the key is removed from the ignition lock cylinder, or if the ignition key is turned to the ON position.

The key-in-ignition warning chime inputs are:

- ignition switch position.
- door ajar data communicated by the smart junction box (SJB) to the instrument cluster through the CAN.
- key-in-ignition switch signal from the ignition switch.

Headlamps On Warning Chime

The headlamps on warning chime warns that the headlamps are on when the driver door is ajar and the key is removed from the ignition lock cylinder. The headlamps on warning chime sounds if the driver door is ajar, the headlamp switch is in the headlamp or parking lamp on position, and the ignition switch in the OFF/LOCK position.

The headlamps on warning chime stops sounding when any one of the above conditions are removed.

The headlamps on warning chime inputs are:

- ignition switch position.
- driver door ajar data communicated by the SJB to the instrument cluster through the CAN.
- headlamp switch data communicated by the SJB to the instrument cluster through the CAN.

Turn Signal On Warning Chime

The turn signal on warning chime warns that the turn signal has not been cancelled. The turn signal on warning chime sounds if the left or right turn signal is on and the vehicle has traveled more than 2.4 km (1.5 miles).

The turn signal on warning chime stops sounding if the turn signal is turned off, or if the ignition key is turned to the OFF or ACC position.

The turn signal on warning chime inputs are:

- turn signal data communicated by the SJB to the instrument cluster through the CAN communication.
- odometer count data communicated by the powertrain control module (PCM) to the instrument cluster through the CAN.

Parking Brake Warning Chime

The parking brake warning chime warns that the parking brake is engaged when the vehicle is in motion. The parking brake warning chime sounds if the ignition key is in ON position, the parking brake is engaged, and the vehicle speed is greater than 5 km/h (3 mph).

The parking brake warning chime stops sounding if the parking brake is released, the ignition key is not in the ON position, or if the vehicle speed is less than 5 km/h (3 mph).

The parking brake warning chime inputs are:

- ignition switch position.
- parking brake switch data communicated by the SJB to the instrument cluster through the CAN.
- vehicle speed data communicated by the PCM to the instrument cluster through the CAN.

Air Bag Secondary Warning Chime

The air bag secondary warning chime warns that the air bag warning indicator light does not work correctly. The instrument cluster monitors the air bag warning indicator status internally. When a fault is present in the air bag warning indicator and the instrument cluster receives an air bag warning indicator on request from the RCM, the air bag secondary warning chime sounds.

The air bag secondary warning chime inputs are:

- air bag warning indicator request data communicated by the RCM to the instrument cluster.

Turn/Hazard On Tone

The turn/hazard on tone provides an audible signal in addition to the turn/hazard indicator lamps. The turn/hazard on tone sounds if the turn or hazard signals are on.

The turn/hazard on tone inputs are:

- left turn indicator signal from the SJB to the instrument cluster.
- right turn indicator signal from the SJB to the instrument cluster.

Message Center Warning Chime

The message center warning chime sounds when a warning message is displayed on the message center. If multiple warning messages are present, a chime tone sounds for each of the warnings that are displayed. The message center warning chime inputs are the warning messages displayed on the message center. The message center warning chime sounds when a malfunction is detected in one of the following systems:

- tire pressure monitoring system (TPMS)
- door ajar
- low fuel level