Indicator Lamps Actuated Over Direct Lines

The Instrument Cluster (IC) is used to inform the driver about important vehicle operating conditions and to warn the driver about potentially critical operating conditions. For this, the IC has indicator lamps, display gauges and audible tones. The IC's indicator lamps are displayed by text overlays that show the lamp's function. The information required for the indicator lamps and audible tones is transmitted from their sensors to the IC via direct lines or from their control modules to the IC via the Controller Area Network (CAN) data bus.

The IC has a microprocessor for analyzing the incoming data for the indicator lamps and audible tones. The program and the data required are stored in an electronic memory chip called the erasable electronic programable read only memory (EEPROM).

The indicator lamps are listed below according to their type and actuation method (direct lines / CAN Bus).

INDICATOR LAMPS ACTUATED OVER DIRECT LINES
- Low tire pressure indicator lamp
- Left turn signal indicator lamp
- Right turn signal indicator lamp
- High beam indicator lamp
- Low fuel level indicator lamp
- Low washer fluid indicator lamp
- Low coolant level indicator lamp
- Battery voltage indicator lamp
- Seat belt indicator lamp
- Lamp outage indicator lamp
- Malfunction indicator lamp (MIL)
- Brake Assist System (BAS) MIL
- Electronic Stability Program (ESP) warning lamp
- Supplemental Restraint System (SRS) MIL

INDICATOR LAMPS ACTUATED OVER THE CAN DATA BUS
- Brake warning indicator lamp
- Brake wear indicator lamp
- Antilock Brake System (ABS) warning indicator lamp

AUDIBLE TONE ACTUATED OVER THE CAN DATA BUS
- Parking brake warning




FLEXIBLE SERVICE SYSTEM (FSS) INDICATOR
The Flexible Service System (FSS) indicator (2) draws the attention of the driver to a particular service that is due. The FSS indicator (2) is a mileage/time-activated engine service system for recommended oil change intervals. In addition to time (in days) and distance criteria, other factors, such as extreme speeds or cold starts that are in combination with short distances, are taken into account for adjusting the programmed service intervals. If the oil level drops below a warning threshold, the remaining distance (1) or the remaining time

1. and the tool symbol (2) are displayed. The FSS indicator
2. has its own microprocessor in the IC. The FSS indicator (2) obtains time information from the digital clock integrated into the IC. The other data required is obtained via the CAN data bus from the Controller Antilock Brake (CAB) and the Power-train Control Module (PCM).




CAN data required for the FSS indicator:
- 4 WSS signals for calculating vehicle speed and distance from the CAB
- Coolant temperature from the PCM
- Engine speed from the PCM
- Load torque from the PCM




The instrument cluster includes four analog gauges.




1. Speedometer The speedometer has a 0-160 Miles Per Hour (MPH) primary scale with Kilometers Per Hour (km/h) on the secondary scale. The speedometer receives wheel speed data from the CAB via the CAN data bus and can be verified by comparing the speed signal viewed by the DRBIII(R) from the wheel speed sensors (WSS) and the output seen on the IC. The Electronic Stability Program (ESP) indicator lamp located between the left and right turn signals in the speedometer face illuminates when it is activated by the Controller Antilock Brake (CAB), indicating the need to adjust driving behavior to the prevailing road conditions. Also located in the speedometers face are the trip odometer and the Flexible Service System (FSS) indicator/ odometer (1). To the right and left of the speedometer face, mounted in the IC, are the rotary dials (2-3) for the FSS and the digital clock.




2. Tachometer The 7000 rpm tachometer is red-lined at 6200 rpm The tachometer also contains the digital clock and the transmission range indicator.




3. Fuel level and Coolant temperature

The fuel level gauge is displayed in increments of one-quarter marks displaying F (Full), 1/2 (one half tank) and E (Empty). The temperature gauge is displayed as H (High) and L (Low).

The outside ambient air temperature digital display is located in the lower center portion of the coolant temperature / fuel gauge and is calibrated in degrees Fahrenheit (° F).

INSTRUMENT CLUSTER DIGITAL DISPLAYS




Five electronic digital displays show cumulative odometer, trip odometer, time, outside ambient air temperature, and, if equipped, automatic transmission range or gear. The transmission display shows P, R, N or D under normal driving conditions. The clock is also located in the base of the tachometer. A knob between the tachometer and the speedometer resets the digital clock.




The trip odometer (1) can be reset at anytime. The odometer (1) display also shows the distance remaining to the next regular maintenance service as calculated by the FSS. Pressing the dial to the left (3) of the speedometer resets the trip odometer. One press is used if the ignition switch is in the "RUN" position, two presses with the ignition switch in other positions or with the key removed. The trip and cumulative odometer displays are also used to show engine oil level.




The outside ambient air temperature digital display adapts to outside ambient air temperature in steps depending on the following driving conditions; stop and go traffic, constant speed driving, and the level of temperature change. During idling or slow driving, the temperature reading may be affected by road or engine heat because the sensor is located in the lower portion of the front fascia. The outside ambient air temperature sensor is not a scientific weather tool for calculating the exact outside temperature. The outside ambient air temperature sensor does not take into account the relative humidity or the current wind chill. Therefore, there may be a difference in temperature readings and actual current outside temperatures.

WARNING INDICATORS
There are eighteen indicator lamps that warn of malfunctions or vehicle components and operating conditions that need attention. The indicator lamps are grouped together in two windows, one to the left of the Fuel/Temperature gauge and the other to the right of the Tachometer. All of the indicator lamps illuminate each time the engine is started to verify system operation and to perform an IC bulb check. The following eighteen indicators are present:




WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, SEAT BELT TENSIONER, FRONT IMPACT SENSORS, SIDE CURTAIN AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

1. Airbag warning indicator lamp (SRS) The Airbag warning indicator lamp illuminates if there is a malfunction in the Supplemental Restrain System (SRS). During its bulb check, the Airbag warning indicator lamp stays illuminated for approximately six seconds, then goes out. If the Airbag warning indicator lamp fails to perform a bulb check or stays illuminated, there may be a malfunction in the SRS and should be checked using the DRBIII(R) for any DTCs that may be present.




2. Antilock warning indicator lamp (ABS) The Antilock warning indicator lamp illuminates if there is a malfunction in the ABS. If the Antilock warning indicator lamp stays illuminated after the bulb check or any service performed, it should be checked using the DRBIII(R) for any DTCs that may be present. If the Antilock warning indicator lamp is illuminated, the brake system will operate as if it did not have ABS.




3. Battery voltage indicator lamp The Battery voltage indicator lamp illuminates when the charging system falls below current demand causing the battery to not receive a full charge during operation.




4. Brake assist indicator lamp (BAS), Electronic Stability Program (ESP) The BAS/ESP indicator lamp illuminates if there is a malfunction in the BAS/ESP. If the BAS/ESP indicator lamp illuminates at any time during or after any service is performed it should be checked using the DRBIII(R) to verify any DTCs that may be present.




5. Brake warning indicator lamp The Brake warning indicator lamp illuminates when the brake fluid in the brake fluid reservoir drops below the minimum level indicated on the side of the brake fluid Reservoir.




6. Brake wear indicator lamp The Brake wear indicator lamp illuminates when the front brake pads reach their replacement threshold.




7. Electronic Stability Program indicator lamp (ESP) The Electronic Stability Program indicator lamp located between the left and right turn signal indicators illuminates when the ESP button, located on the center console, is pushed, activating the ESP system. The Electronic Stability Program indicator lamp will go out if the ESP button is pressed again, deactivating the system. When the Electronic Stability Program is activated, the ESP indicator lamp will illuminate to warn the driver of compensations being made by the ESP system.




8. High beam indicator lamp The High beam indicator lamp illuminates when the high beam lamps are activated by the multifunction switch located in the steering column.




9. Lamp outage indicator lamp The Lamp outage indicator lamp illuminates if there is an exterior lamp failure such as a headlamp or taillamp failure.




10. Low coolant indicator lamp The Low coolant indicator lamp illuminates if the engine coolant drops below its threshold indicating a low engine coolant level.




11. Low fuel warning lamp The Low fuel warning lamp, located on the left side of the cluster, illuminates when the fuel level in the fuel tank reaches approximately 8 liters (2.1 gallons) to indicate a low fuel level.




12. Low tire pressure indicator lamp The Low tire pressure indicator lamp illuminates if any of the tires loses pressure or is inflated above the recommended pressure.




13. Low washer fluid indicator lamp The Low washer fluid indicator lamp illuminates to indicate a low windshield washer fluid level.




14. Malfunction Indicator Lamp (MIL) The Malfunction Indicator Lamp illuminates when there is a malfunction or DTC present in the Powertrain Control Module (PCM) or Transmission Control Module (TCM).




15. Oil level indicator lamp The Oil level indicator lamp illuminates if the engine oil drops below 4.25 liters (4.5 quarts), indicating that the engine oil has dropped by 1.9 liters (2 quarts).




16. Seat belt indicator lamp The Seat belt indicator lamp illuminates if the driver's seat belt is not buckled




17. Telescoping wheel indicator lamp The Telescoping wheel indicator lamp illuminates if the manually telescoping wheel is not locked into position.




18. Turn signal indicator lamp The Turn signal indicator lamps, located in the upper portion of the speedometer on the right and left of the ESP indicator, illuminate when either the right or left turn signal is activated by the multifunction switch on the steering column. Both lamps will illuminate when the Emergency Flasher switch has been activated.

The cluster gives audible tone signals to notify the driver to take the following actions:

NOTE: With the key removed and the door open, the audible tone sounds if the headlamps or parking lamps are on. Operation of the standing lamps, which are intended for use when the vehicle is unoccupied, will not trigger this warning.

- Release the parking brake
- Switch off headlamps.
- Remove the key from the ignition.

Turn signal indicator ticking, activating the turn signal switch is indicated audibly by the turn signal indicator ticking. The driver's attention is brought to a problem in the turn signal system by the turn signal indicator ticking at a higher frequency. The turn signal indicator ticking is generated electromagnetically. The frequency corresponds to that of the turn signal indicator lamp.

Parking Brake-on reminder, an audible sound is emitted via a small speaker whenever the cluster detects the parking brake switch is in the ON position at a speed of 5 km/h (3 MPH) or more.

Headlamps-on reminder, the Headlamps-on reminder sounds when the headlamp switch is in the ON position, the ignition key is removed from the ignition, and the driver's door is open.
Key-in-ignition reminder, the Key-in-ignition reminder sounds when the driver's door is open with the key in the ignition.

INDICATOR LAMPS AND AUDIBLE TONES TRIGGERED OVER DIRECT LINES
- Left and Right turn signals from the illumination control module.
- Brake warning indicator lamp � from the brake fluid level switch.
- Low washer fluid indicator lamp from a single line to the instrument cluster and is voltage-encoded.
- Low coolant indicator lamp � from a single line to the instrument cluster and is voltage-encoded.
- Low fuel warning lamp from the Instrument Cluster. The lamp illuminates whenever the fuel level drops to 8 liters (2.1 gallons) The lamp extinguishes after refueling is detected. If fuel is added with the ignition key in the ON position, refueling is detected only after 7.9 liters (2 gallons) or more of fuel is added.
- Lamp outage indicator lamp � from the illumination control module.
- Airbag warning lamp � from the Occupant Restraint Controller (ORC).

INDICATOR LAMPS AND AUDIBLE TONES TRIGGERED BY THE CAN DATA BUS
- Brake wear indicator lamp � from the CAB.
- Oil level indicator lamp � from the PCM.
- Antilock warning indicator lamp (ABS) from the CAB.
- Malfunction Indicator Lamp (MIL) from the PCM.
- Electronic Stability Program (ESP) indicator lamp from the CAB. The lamp is illuminated if there is a fault in the ESP system or whenever the system is making compensations for driving conditions.




INSTRUMENTS ACTUATED BY THE CAN DATA BUS
- Odometer (1), the input is transmitted by the Controller Antilock Brake (CAB) and is determined using input from the four wheel speed sensors.
- Speedometer, the input is transmitted by the Controller Antilock Brake (CAB) and is determined using input from the four wheel speed sensors. The individual wheel speeds are compared and checked for logic. If significant differences in individual speed signals are recognized, the speed is determined from the speed of one of the front wheels. If the speed signals differ significantly, it may be due to wheel spin, cornering, or a defective speed sensor. If the computer identifies by means of sensor comparisons (comparison of each side) that the vehicle is cornering, the speed is determined from the value of the front wheel speeds. If the comparisons indicate one or more different wheel speeds, the vehicle speed is determined from the highest wheel speed. This also applies if a fault indication is received instead of a wheel speed signal. In this case, an error bit is also set. If any fault indications are received for all wheel speeds, the speed displayed is "O".




Tachometer, the engine speed signal is transmitted by the PCM and determined from the crankshaft position sensor signal.

APPEARANCE AND LIGHTING
Black instrument faces have a blue-green backlighting when the exterior lamps are on. Digital displays also have a blue-green backlighting. A rotary dial to the left of the speedometer adjusts the lamp intensity. Digital displays activate when a door is opened, when the ignition switch is in the ON/RUN position, or by pressing the lamp intensity adjustment knob when the ignition is off.




CONTROL BUTTONS
The instrument cluster has two control dials which are to the left and right of the speedometer face.
- The right control dial (2) is used to adjust the time. Refer to the Owner's Manual.
- The left control button (3) is used to regulate the instrument illumination, activate the display illumination, reset the trip odometer display, and operate the FSS maintenance display.




OUTSIDE AMBIENT AIR TEMPERATURE
To display the outside ambient air temperature requires the following:
- outside air temperature
- wheel speed signal
- engine run time
- engine coolant temperature

The outside ambient air temperature is determined by the outside ambient air temperature sensor. The temperature sensor is installed at the front left of the vehicle under the bumper fascia and is connected to the IC. The wheel speed signal, engine run time, and engine coolant temperature are determined internally by the IC. Since the outside ambient air temperature display depends on the wheel speed, engine run time, and engine coolant temperature, temperatures (influenced by the heat generated by the engine, for example) are not updated when the vehicle is stationary or moving slowly.

- When the ignition is in the ON position and the engine coolant temperature < 60° C (140° F), the current air temperature is always stored and displayed.
- When the ignition is in the OFF position and the engine coolant temperature < 60° C (140° F), the air temperature last measured is stored and displayed.
- When the ignition is in the ON position and the engine coolant temperature < 60° C (145° F), the stored air temperature is displayed.
- At vehicle speeds of 19-60 km/h (12-37 MPH), outside air temperatures are displayed after a delay of approximately 5 minutes.
- At vehicle speeds over 60 km/h (37 MPH), outside air temperatures are displayed after a delay of approximately 2 minutes.




FLEXIBLE SERVICE SYSTEM (FSS) MAINTENANCE INDICATOR
The FSS maintenance indicator informs the driver when maintenance is due. The FSS maintenance indicator operates based on distance traveled and time between service criteria. After exceeding a total distance or total time set at the factory, the FSS maintenance indicator activates: The tool symbol (2) comes on and the FSS maintenance information (1) is displayed instead of the total mileage. The FSS maintenance indicator obtains its time information from the digital clock integrated into the IC. The odometer signal calculated in the IC is used for the mileage information. For this purpose, the IC receives four wheel speed signals from the CAB via the CAN data bus. (Speedometer, Odometer and the FSS maintenance indicator are therefore, closely interrelated).

The remaining mileage is compared with the remaining time at key-on. When the time criterion has reached the priority level, the display (1) switches to the remaining time. The remaining mileage display (1) will be displayed automatically with the ignition switch in the "RUN" position after 5 seconds or while driving after reaching the warning threshold. The tool symbol (2) and the current remaining mileage (1) appear for 10 seconds, then automatically with the ignition switch in the "RUN" position after 5 seconds or while driving when the remaining mileage (1) has been exceeded. In this case, the display (1-2) flashes and the "remaining mileage" (1) is indicated with a negative sign (minus sign). After reaching the display overrun at -99,000 km (or -99,000 miles), the display (1) will remain at this value.

The remaining mileage (1) is displayed to a resolution of 100 km (or 100 miles). Normally, the remaining mileage is always displayed. However, to ensure that "occasional drivers" are also made aware when FSS maintenance service is due, the mileage (1) and time information are always processed in the background. The data remains stored even in the event of a system voltage failure.

The time remaining until the next FSS maintenance service is calculated starting with the total time set at the factory. The total time means the time specified between two FSS maintenance intervals. The remaining time means the time remaining until the next FSS maintenance service is due. The remaining time is strictly a time criterion. The remaining time is reduced by one day each day regardless of the mileage. The tool symbol (2), the current remaining time (1), and "D" for days will appear for 10 seconds and automatically with the ignition switch in the "RUN" position after 5 seconds or while driving when the remaining time (1) has exceeded the time threshold. In this case, the display flashes and the "remaining time" is indicated with a negative sign (minus sign). After reaching the display overrun at -730 days, the display remains at this value. The display has a resolution of 1 day.




ACKNOWLEDGING THE FSS MAINTENANCE INDICATOR
The display of the remaining mileage (1) as well as the remaining time (1) can be acknowledged and canceled by pressing the left rotary dial (3) on the IC for at least one second. It makes no difference what caused the information to be displayed.