Instrument Cluster

INSTRUMENT PANEL CLUSTER (IPC) DESCRIPTION AND OPERATION

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 air bag indicator flashes 7 times.
- The ABS indicator illuminates briefly.
- The check engine indicator (MIL) illuminates briefly.
- The brake indicator illuminates briefly.
- All gages sweep.
- The HUD illuminates all segments briefly.
- The security indicator illuminates briefly.
- The check gages indicator illuminates briefly.
- The traction indicator illuminates briefly.
- The seat belt indicator illuminates.
- The MPH or KM/H indicator illuminates.
- The DIC displays CORVETTE BY CHEVROLET briefly and then it will display the last item before key off.
- The audible warning chimes 6 times.

INDICATORS AND WARNING MESSAGES
Refer to Indicator/Warning Message Description and Operation.

ENGINE COOLANT TEMPERATURE GAGE
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 gage defaults to 215°C (260°F) or below if:
- The PCM detects a malfunction in the engine coolant temperature sensor circuit.
- The IPC will display the engine coolant temperature message on the DIC.
- The check gages indicator turns on.

ENGINE OIL PRESSURE GAGE
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 gage defaults to 0 kPa (0 psi) or below if:
- The PCM detects a malfunction in the engine oil pressure sensor circuit.
- The IPC will display the low oil pressure message on the DIC.
- The check gages indicator turns on.

FUEL GAGE
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 gage defaults to empty if:
- The PCM detects a malfunction in the fuel level sensor circuit.
- The IPC displays a low fuel message on the DIC.
- The check gages indicator turns on.

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. The speedometer defaults to 0 km/h (0 mph) if a malfunction in the vehicle speed signal circuit (4000 pulses/mile) exists. The speedometer displays either miles or kilometers as requested by the activation of the English/metric button on the driver information center (DIC). The associated indicator (MPH or KM/H) illuminates.

TACHOMETER
The IPC displays the engine speed as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the engine speed. The tachometer will default to 0 RPM if the PCM detects a malfunction in the engine speed sensor circuit.

VOLTMETER
The IPC displays the system voltage as detected at the ignition 1 input of the IPC. The voltage on the volt gage is also displayed on the DIC. The IPC displays high or low voltage on the DIC when the IPC detects voltage levels out of range.