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 anti-lock brakes (ABS) indicator illuminates briefly. |
| • | The service engine soon indicator (MIL) illuminates briefly. |
| • | The charge indicator illuminates and only turns off when the vehicle is started. |
| • | The check gages indicator illuminates and only turns off when the vehicle is started. |
| • | The intake heater indicator will illuminate briefly and will cycle during the engine warm-up process. |
Indicators and Warning Messages
Refer to Indicator/Warning Message Description and Operation .
Engine Coolant Temperature Gage
The engine coolant temperature (ECT) is displayed in the IPC based on the resistance of the engine coolant temperature sensor signal circuit. An ECT sensor resistance of approximately 1305 ohms will indicate an ECT gage display of approximately 40°C (104°F). An ECT sensor resistance of approximately 61.9 ohms will indicate an ECT gage display of approximately 118°C (245°F).
Engine Oil Pressure Gage (L18)
The engine oil pressure (EOP) is displayed in the IPC based on the information from the PCM via the oil pressure gage signal circuit. The PCM monitors the signal circuit of the EOP sensor. The EOP sensor is a variable resistor ranging from 0-90 ohms. A resistance of 1 ohms will be displayed as 0 kPa (0 psi). A resistance of 88 ohms will be displayed as 551 kPa (80 psi).
Engine Oil Pressure Gage (LG5)
The engine oil pressure (EOP) is displayed in the IPC based on the resistance of the EOP sensor signal circuit. An EOP sensor resistance of 1 ohms will be displayed as 0 kPa (0 psi). A resistance of 88 ohms will be displayed as 551 kPa (80 psi).
Fuel Gage
The fuel level is displayed in the IPC based on the resistance of the fuel level sensor signal circuit. The fuel level sensor is a variable resistor ranging from 0-90 ohms. When the fuel tank is full the fuel level sensor resistance is high. When the fuel tank is empty the fuel level sensor resistance is low.
Hourmeter
The hourmeter displays the total accumulated engine run time hours. The hourmeter uses voltage pulses from the generator via the engine speed signal circuit in order to record vehicle engine run time hours. The accumulated hours will not change if the battery is disconnected or removed.
Odometer
The IPC monitors the vehicle speed signal circuit in order to display the vehicle mileage. The IPC contains a season odometer and a trip odometer. The vehicle mileage or the trip mileage are displayed in the IPC as determined by briefly pressing the trip/reset switch on the IPC. Pressing the trip/reset switch for greater than 2 seconds, while the trip odometer is displayed, will reset the trip odometer. The odometer displays either miles or kilometers.
Speedometer
The vehicle speed is displayed in the IPC based on the information from the PCM. The PCM converts the data from the vehicle speed sensor into a 4000 pulses/mile signal. The IPC uses the vehicle speed signal circuit from the PCM in order to display the vehicle speed. If a malfunction occurs in the vehicle speed signal circuit, the speedometer defaults to 0 km/h (0 mph). The speedometer displays both miles and kilometers.
Tachometer (L18)
The PCM converts the data from the crankshaft position sensor into a 2 pulses/engine revolution signal. The IPC uses the engine speed signal circuit from the PCM in order to calculate the engine speed. The tachometer defaults to 0 RPM if a malfunction in the engine speed signal circuit exists.
Tachometer (LG5)
The tachometer uses voltage pulses from the generator via the engine speed signal circuit in order to display the engine speed.
Transmission Fluid Temperature Gage
The transmission fluid temperature gage displays the transmission fluid temperature based on the information from the transmission fluid temperature gage sensor signal circuit. The transmission fluid temperature gage sensor resistance is used to control the transmission fluid temperature gage. The transmission fluid temperature gage sensor resistance is inversely proportional to the transmission fluid temperature. A high transmission fluid temperature gage sensor resistance will display a transmission fluid temperature gage reading of approximately 40°C (104°F). A low transmission fluid temperature gage sensor resistance will display a transmission fluid temperature gage reading of approximately 120°C (248°F).
Ammeter
The system voltage is displayed in the IPC as detected at the ignition 1 voltage circuit. The ammeter displays the electrical system voltage when the ignition switch is in the RUN or START position.
