Displays Test
Certain instrument panel cluster (IPC) features are tested when the
ignition is turned on in order to verify the features are working properly.
The following occurs at key up:
| • | The ABS Indicator illuminates for 3 seconds. |
| • | The AIR BAG Indicator flashes 7 times. |
| • | The Battery Indicator illuminates for 3 seconds. |
| • | The Brake Indicator illuminates for 3 seconds. |
| • | The CHECK GAUGES Indicator illuminates for 3 seconds. |
| • | The LOW FUEL Indicator illuminates for 3 seconds. |
| • | The Park Brake Indicator illuminates for 3 seconds. |
| • | The SERVICE ENGINE SOON (MIL) Indicator illuminates and remains
on. |
| • | The Seatbelt Indicator illuminates for 20 seconds followed
by 55 seconds of flashing with the drivers seatbelt unfastened, or,
the seatbelt indicator will illuminate for 8 seconds with the drivers
seatbelt fastened. |
| • | The SECURITY Indicator illuminates for 3 seconds. |
| • | The SERVICE 4WD Indicator illuminates for 3 seconds. |
| • | The SHIFT Indicator illuminates for 3 seconds. |
| • | The coolant temperature gauge sweeps to its minimum physical position
to its actual physical position within 3 seconds. |
| • | The fuel gauge sweeps to its minimum physical position to its
actual physical position within 3 seconds. |
| • | The oil pressure gauge sweeps to its minimum physical position
to its actual physical position within 3 seconds. |
| • | The speedometer sweeps to its minimum physical position to its
actual physical position within 3 seconds. |
| • | The tachometer sweeps to its minimum physical position to its
actual physical position within 3 seconds. |
| • | The volt gauge sweeps to its minimum physical position to its
actual physical position within 3 seconds. |
Indicators and Warning Messages
Refer to
Indicator/Warning Message Description and Operation
.
Engine Coolant Temperature Gauge
The IPC displays the engine coolant temperature as determined by the
PCM. The IPC receives a class 2 message from the PCM indicating the
engine coolant temperature. The engine coolant temperature gauge defaults
to 100°F (40°C) or below if:
| • | The PCM detects a malfunction in the engine coolant temperature
sensor circuit. |
| • | The IPC detects a loss of class 2 communications with the
PCM. |
Engine Oil Pressure Gauge
The IPC displays the engine oil pressure as determined by the PCM. The
IPC receives a class 2 message from the PCM indicating the engine oil
pressure. The engine oil pressure gauge defaults to 0 psi (0 kPa)
or below if:
| • | The PCM detects a malfunction in the engine oil pressure sensor
circuit. |
| • | The IPC detects a loss of class 2 communications with the
PCM. |
Fuel Gauge
The IPC displays the fuel level as determined by the PCM. The IPC receives
a class 2 message from the PCM indicating the fuel level percent. The
fuel gauge defaults to empty if:
| • | The PCM detects a malfunction in the fuel level sensor circuit. |
| • | The IPC detects a loss of class 2 communications with the
PCM. |
When the fuel level is less than a pre-determined value, the low fuel
indicator illuminates.
Odometer
The IPC contains a season odometer and a trip odometer. Momentarily
press the trip/reset switch on the IPC in order to toggle between the season
odometer and the trip odometer. Press the trip/reset switch for greater
than 2 seconds, while the trip odometer is displayed, in order
to reset the trip odometer. The IPC displays the vehicle mileage and trip
mileage as determined by the IPC. The IPC calculates the mileage based
on the vehicle speed signal circuit from the PCM. The odometer will display
'error' if an internal IPC memory failure is detected.
PRNDL Display
The IPC displays the selected gear position as determined by the PCM.
The IPC receives a class 2 message from the PCM indicating the gear
position. The PRNDL display blanks if:
| • | The PCM detects a malfunction in the transmission range switch
circuit. |
| • | The IPC receives a class 2 message indicating the park
position and the column park switch indicates a position other than park (open
input). |
| • | The IPC detects a loss of class 2 communications with the
PCM. |
Speedometer
The IPC displays the vehicle speed based on the information from the
vehicle speed sensor. The PCM converts the data from the vehicle speed sensor
to a 4000 pulses/mile signal. The IPC uses the vehicle speed signal circuit
(4000 pulses/mile) from the PCM in order to calculate the vehicle speed.
If the IPC detects a malfunction in the vehicle speed signal circuit,
the IPC uses the class 2 message from the PCM indicating the vehicle
speed.
Tachometer
The IPC displays the engine speed based on the information from the
engine speed sensor. The PCM converts the data from the engine speed sensor
to a 2 pulses/engine revolution signal. The IPC uses the engine speed
signal circuit (2 pulses/engine revolution) from the PCM in order to calculate
the engine speed. If the IPC detects a malfunction in the engine speed signal
circuit, the IPC uses the class 2 message from the PCM indicating
the engine speed.
Voltmeter
The IPC uses class 2 serial data information to provide a voltage
level indication on the Voltmeter. The voltage level is provided via the serial
data link to the IPC. The IPC in turn provides a voltage to the gauge in
order to set the voltage level indication relative to the level received
in the class 2 message.
