Air Bag Warning Indicator
The inflatable restraint diagnostic energy reserve module path sensor
(SDM) over the class II serial data line controls the air bag indicator.
The SDM will turn the indicator ON for approximately 3 seconds during
the engine start up in order to perform a bulb check. The SDM will turn the
indicator ON in order to warn the driver of a supplemental inflatable restraint
(SIR) electrical system malfunction, possibly affecting the operation of
the SIR system. Refer to Supplemental Inflatable Restraint (SIR) System.
ANTI--LOCK Indicator
The Electronic Brake Control Module/Electronic Brake Traction Control
Module(EBCM/EBTCM) over the class II serial data line controls the
ANTI--LOCK warning indicator. The EBCM/EBTCM turns the indicator ON for
approximately 3 seconds during the engine start up in order to perform
a bulb check. The EBCM/EBTCM flashes the ANTI--LOCK warning indicator
in order to warn the driver that an ABS malfunction exists, possibly degrading
the base brake performance. A solid (not flashing) ANTI--LOCK warning
indicator warns the driver that a problem has been detected that affects
the operation of the ABS (ABS may be disabled), but normal brake performance
will remain. Refer to Antilock Brake System.
Automatic Transaxle Control Position Indicator
The Powertrain Control Module transaxle range switch performs the following
functions:
| • | Reads the transmission gear position. |
| • | Sends the transmission gear position information to the instrument
cluster via Class II serial data bus. |
The instrument cluster displays the gear position.
Brake Warning Indicator
The brake warning indicator lights under the following conditions:
| • | When the master cylinder senses a low brake fluid level |
| • | When the parking brake switch is closed |
| • | When certain ABS Diagnostic Trouble Codes (DTC's) are set by the
EBCM/EBTCM |
The brake warning indicator warns the driver that a base brake problem
may exist. Refer to Antilock Brake System.
CHANGE OIL SOON Indicator
The Powertrain Control Module (PCM) determines the amount of oil life
from various sensors and inputs within the engine control system. The PCM
performs the following functions:
| • | Calculates the oil life. |
| • | Sends the calculation to the instrument cluster via the class II
serial data bus. |
When the PCM determines that an oil life of 0% is present, the PCM informs
the driver by turning on the CHANGE OIL SOON indicator. After an oil change,
the light may be reset by performing the following procedures:
| • | Turn the ignition switch to the RUN position (engine OFF). |
| • | Fully depress and release the accelerator pedal 3 times
within 5 seconds. |
The CHANGE OIL SOON indicator flashes 2 times indicating the
system is reset. If the light comes on and stays on for 5 seconds, the system
did not reset. The system will need to be reset again.
If the vehicle is equipped using an up-level cluster including a Driver
Information Display (DID), the system may be reset by pressing the DID RESET
button for approximately 5 seconds while viewing the oil life display
on the DIC.
Charge Warning Indicator
The powertrain control module (PCM) via the class II serial data
line controls the charge warning indicator. The instrument cluster turns lights
the charge indicator under the following conditions:
| • | When the powertrain control module (PCM) detects an undervoltage
(11.2 Volts) or overvoltage (16.5 Volts). |
Dimming Control
The display dimming for the instrument cluster shall follow the radio
dimming characteristics. Upon the activation of the park lamp, the display
shall step dim to maximum tightness in the dim mode. The PWM dimming signal
of the instrument dimming control shall control further dimming. The display
may go blank upon the lowest dimming request of the dimming control.
Coolant TEMP Indicator
The coolant temperature data is calculated within the Powertrain Control
Module (PCM). The PCM via the class II serial data line controls the
coolant TEMP indicator. The instrument cluster lights the coolant TEMP indicator
when the PCM determines that the engine coolant temperature has reached a
value of approximately 124° C (255°F). Refer to Engine Controls.
CRUISE Indicator
The PCM sends a signal across the class II serial data line whenever
the cruise control is activated. Refer to Cruise Control.
Engine Coolant Temperature Gauge
The Power Control Module (PCM) via the class II serial data line
to the instrument cluster, broadcasts the coolant temperature. The instrument
cluster compares the temperature data using a 16 point look-up table
in order to determine the needle deflection. A smooth filter is used in order
to secure a continuous response. The instrument cluster drives the temperature
gauge to C (cold) under the following conditions:
| • | The temperature data is lost. |
| • | The PCM is in a state of health fault. |
Fasten Belts Indicator
The seat belt data is received from the BCM via the class II
serial data line. The BCM sends a signal in order to turn on the seat belt
warning indicator under the following 2 conditions occur:
| • | The BCM detects that the ignition switch is in the RUN position. |
| • | The seat belt has not been latched. |
Refer to Body Control Module.
Fuel Gauge
The Powertrain Control Module (PCM) via the class II serial data
line to the instrument cluster broadcasts the fuel level data. The instrument
cluster compares the temperature data using a 16 point look-up table
in order to determine the needle deflection. A smooth filter is used in order
to secure a continuous response. The instrument cluster may determine if a
low fuel condition is present. In the event of a low fuel condition, the following
conditions may occur:
| • | The instrument cluster shall activate the LOW FUEL indicator. |
| • | Send a chime message to the Body Control Module (BCM). |
The instrument cluster may drive the fuel gauge to E (empty) under the
following conditions:
| • | The fuel level data is lost. |
| • | The PCM is in a state of health fault. |
High Beam Indicator
The high beam indicator is turned on when a ground signal is sent to
the IC on CKT 1200. This signal is generated by the headlamp switch
when the headlamp switch is in either of the following positions:
Refer to Headlights.
LOW COOLANT Indicator
The LOW COOLANT indicator receives battery voltage when the ignition
switch is in the following positions:
The instrument cluster will turn the indicator ON for approximately
1 second during engine start up in order to perform a bulb check. The
engine coolant level switch grounds the indicator with the coolant level
in the coolant reservoir below the minimum recommended level.
Low Fuel Indicator
The low fuel indicator comes on when the fuel level signal to the fuel
drops below 1/8 of a tank.
LOW OIL Level Indicator
The Power Control Module (PCM) via the class II data line controls
the LOW OIL level indicator. The PCM samples the oil level 1 per ignition
cycle, only at power-up. Test for low oil level at the start-up when one of
the following conditions present:
| • | If the engine coolant temperature was between 15°C (59°F)
and 90°C (194°F) at the last key OFF, ensure that the engine coolant
temperature at key ON is at least 12°C (22°F) cooler than the engine
coolant temperature at the last key OFF. |
| • | If the engine coolant temperature was higher than 90°C (194°F)
at the last key OFF, ensure that the time between the last key OFF and the
present key ON is sufficient in order to allow the oil to drain back to the
sump. The PCM will remain powered up for 10 seconds in order to ensure
that the oil has drained back to the sump. If the key is turned back to ON
while the PCM is still powered up, the oil level will not be tested. |
| • | The LOW OIL level indicator lights under the following conditions: |
| - | When the PCM determines that a low oil level condition exists. |
| - | During a period of time when the ignition is first turned ON for
a bulb test. |
LOW TRAC Indicator
The Antilock Brake System (ABS) via the class II serial data
line sends the low traction data. The LOW TRAC indicator alerts the driver
when the ABS is active. Anytime the Electronic Brake Traction Control Module
(EBTCM) determines that the vehicle has entered a braking event where the
ABS is required, the LOW TRAC indicator turns on in order to indicate that
the ABS is active. Refer to Antilock Brake System.
LOW WASHER FLUID Indicator
The LOW WASHER FLUID indicator lights up when the windshield washer
solvent level switch detects a low fluid level. The windshield washer solvent
switch pulls the low washer input to the instrument cluster in order to ground
through CKT 99 when the low fluid level is sensed.
Oil Pressure Indicator
The Powertrain Control Module (PCM) via the class II serial data
line senses the oil pressure data. The instrument cluster lights the oil pressure
indicator during a bulb test when the PCM has determined that the oil pressure
does not meet the specified value for that engine. Refer to Engine Controls
PERF SHIFT Indicator
The performance shift PERF SHIFT indicator will light according to the
information sent along the class II serial data line. The performance
shift indicator will indicate to the driver whether or not the performance
mode has been selected at the performance shift switch. The PERF SHIFT indicator
is only available with 3.8 L VIN 1 (supercharged) engines.
SECURITY Indicator
The BCM via the class II serial data line sends the security
data. This indicator may be in the following conditions:
Refer to Theft Deterrent.
SERVICE ENGINE SOON Indicator
The powertrain control module (PCM) controls the SERVICE ENGINE SOON
indicator through CKT 419. The PCM turns the indicator ON for approximately
3 seconds during engine start-up for a bulb check. The PCM lights the
SERVICE ENGINE SOON indicator in order to warn the driver that an engine control
malfunction has been detected. This condition may affect the engine performance.
Refer to Engine Controls.
SERVICE VEHICLE SOON Indicator
The following components may control the SERVICE VEHICLE SOON indicator:
| • | The Electronic Brake Control Module/Electronic Brake Traction
Control Method (EBCM/EBTCM) |
| • | The Powertrain Control Module (PCM) |
| • | The Body Control Module (BCM) |
The SERVICE VEHICLE SOON indicator will turn on for approximately 3 seconds
during the engine star-up for a bulb check. The SERVICE VEHICLE SOON indicator
will turn on in order to warn the drive that a malfunction exists within the
following systems:
| | Refer to Antilock Brake System. |
| | Refer to Body Control Module. |
| | Refer to Engine Controls. |
This condition may degrade the overall vehicle performance.
Speedometer and Odometer
The Vehicle Speed Sensor (VSS) is a gear-driven permanent magnet generator
housed in the transaxle. The sensor generates a sine wave output with a frequency
proportional to the vehicle speed. The Powertrain Control Module (PCM) converts
the signal to an output that switches to ground at a frequency of 4000 pulses
per mile. The signal (CKT 817) is used by various vehicle components.
The signal CKT 817 drives the following components:
The season odometer displays the total accumulated miles/km of the vehicle.
This value is permanently stored in the Electronically Erasable Programmable
Read Only Memory (EEPROM) of the instrument cluster. Contact an authorized
Delco® service center in order to program the proper vehicles specifics
(including mileage) for the instrument cluster, if the following conditions
occur:
| • | An odometer malfunction. |
| • | The instrument cluster needs replacement. |
The trip odometer displays the accumulated mileage/km to the tenths
of a mile/km since the last reset. this value is stored in the Keep Alive
Memory (KAM) of the instrument cluster. The trip odometer may be reset on
the uplevel cluster by pressing the TRIP RESET button. The trip odometer may
be reset on the uplevel cluster by pressing the RESET button when the trip
information is being displayed in the Driver Information Display (DID). If
a button is not used in order to reset the trip odometer, the display will
roll over automatically in the following way:
| • | The trip odometer will roll over to the following values: |
| - | 999.9 miles (English mode) |
| • | When the trip odometer displays more than 621.4 miles (English
mode) and the English/metric button is pressed, the trip odometer performs
the following functions: |
| • | If the English/metric button is pushed again, the cluster converts
the displayed km value into miles. |
Tachometer
The tachometer displays the engine speed in RPMs. The engine RPM is
taken from the Powertrain Control Module (PCM) via the class II serial
data line. The instrument cluster compares the engine RPM data with 16 point
look-up table in order to determine needle deflection. A smooth filter secures
a continuous response. The instrument cluster drives the tachometer gauge
to 0 RPM if the following conditions occur:
| • | The engine RPM data is lost. |
| • | The PCM is in a state of health fault. |
TRAC OFF Indicator
The Antilock Brake System (ABS) vial the class II serial data
line sends the traction off data. This indicator may be on if one of the following
functions occur:
| • | The Electronic Brake Traction Control Module (EBTCM) detects
a condition that causes the traction control system to be inhibited. |
| • | The traction control is turned off. |
Refer to Antilock Brake System/Traction Control System (ABS/TCS).
Turn Signal Indicators
The instrument cluster receives the signal for turning on the turn signal
indicators through the following CKTs.
The IC and the respective turn signal lamps will begin flashing, when
the ignition is in the RUN position with the following conditions present:
| • | The hazard warning switch is in the normal position. |
| • | The turn signal switch is in one of the following positions: |
If the hazard warning switch is in the HAZARD position, the following
components will begin flashing:
Refer to Exterior Lights in Lighting Systems.
Driver Information Display (DID)
The Driver Information Display calculates and displays the following
vehicle parameters:
| • | Instantaneous Fuel Economy (IFE) |
Only one of the parameters may be displayed at a time. The mode indicator
next to the corresponding graphics will light. The user may change the parameter
display by depressing the mode button located on the driver information display
switches. The operator may change units from English to metric by pressing
the E/M button on the face of the driver information display switches. The
display is vacuum fluorescent using the following display type:
| • | 7 segment with parameter units |
The telltale lamps or indicators deliver the following information to
the driver:
The telltale lamps or indicators will light when either of the following
conditions occur:
| • | A grounding switch is closed. |
| • | One of the pertinent modules provides a path to ground for that
indicator. |
Average Fuel Economy
The Average Fuel Economy (AVG) may be displayed on the Driver Information
Display (DID) by pressing the UEL button until the display reads as one of
the following messages:
| • | Fuel Economy Average MPG |
| • | Fuel Economy AVG L/100 km |
The value for the Average Fuel Economy will be reset when the following
conditions occur:
| • | Average Fuel Economy displays on the DID |
| • | The RESET button is pushed |
The calculation for Average Fuel Economy is AFE = (Trip Distance)/(Trip
Fuel Used) x Scale Factor.
The Trip Distance is the distance traveled or the fuel used since the
last reset.
The PCM sends the fuel used data. The dedicated vehicle speed input
sends the Trip Distance.
Instantaneous Fuel Economy (IFE)
The Instantaneous Fuel Economy (IFE) may be displayed on the DID by
pressing the FUEL button into the display reads one of the following messages:
| • | Fuel Economy Inst L/100 km |
Instantaneous Fuel Economy (IFE) is based on the previous few seconds
of driving as in the following calculation. The calculation for Instantaneous
Fuel Economy is IFE = Distance/Fuel Used x Scale Factor.
The Powertrain Control Module (PCM) sends the fuel data. The distance
is determined from the discrete vehicle speed input to the instrument cluster.
This parameter may not be reset by the driver. This portion of the instrument
cluster will be dashed if there is a loss of PCM communications.
The instrument cluster will dash the displays if the following components
are not communicating:
Range
The vehicle range displays as an estimate of the expected remaining
driving distance using the current fuel level. The driving range is based
on the following conditions:
| • | The fuel economy of the last 25 miles. |
Because of the required predictions, the following messages may vary
from each other:
When the calculated range falls below 40 miles, the range display
will read LOW.
The vehicle range is calculated by the instrument cluster.
The calculation for the Vehicle Range is Estimated Drivable Range =
Distance Traveled/Fuel Used x Scale factor X Filtered Fuel in Tank.
The calculation is based on the last 25 miles. The calculation
is an estimate of the drivable range. The calculation may not be reset by
the driver. the data used in order to calibrate the range is lost if the battery
is disconnected. This portion of the instrument cluster will be dashed if
there is a loss of power to the Powertrain Control Module (PCM).
Oil Life
The instrument cluster shall read oil life from the serial data line.
The instrument cluster shall display a number received from the Powertrain
Control Module (PCM) in percentages. When 0% oil life is reached, the instrument
cluster shall perform the following functions:
| • | Extinguish the % units. |
If the oil life mode was not selected by the driver upon entering the
low oil life mode, then the instrument cluster shall perform the following
functions:
| • | Override the mode being displayed |
| • | Select the oil life mode |
The driver may override the low oil life mode by selecting another mode.
If the ignition is cycled the instrument cluster shall re-enter the mode as
if calculated for the first time. The RESET button transmits (while in oil
life mode) the reset signal back to the PCM via the class II serial
data line.
Boost
The BOOST indicator will light because of the information sent along
the serial data line CKT 800. The following graphics will always be
lit with the engine running:
The gradations represent 0.6 PSI of the boost. The gradations
shall be lit if the pressure is equal to or greater than the gradient level.
The BOOST will only be available with the 3.8 L VIN 1 (supercharged)
engines.
