Car runs, radio, power windows, horn work. All dashboard gages worked last night. Have a 2002 Saturn L200.
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The IPC detects a loss of class 2 communications with the PCM.
Fuel Gage
When the fuel level is less than 14% (84ohms), the low fuel indicator illuminates.
Speedometer
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:
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The PCM detects a malfunction in the fuel level sensor circuit.
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The IPC detects a loss of class 2 communications with the PCM.
Odometer
The IPC contains a season odometer and a trip odometer. Momentarily press the trip select/reset switch in order to toggle between the season odometer and the trip odometer. Press the trip select/reset switch for greater than 1.5 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 information 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 shall flash all gear positions if:
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The PCM detects a malfunction in the transmission range switch circuit.
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The IPC detects a loss of class 2 communications with the PCM.
The IPC displays the vehicle speed based on the information from the PCM. The PCM converts the data from the vehicle speed sensor to a 4000 pulses per mile signal. The IPC uses the vehicle speed signal circuit from the PCM in order to calculate the vehicle speed. The speedometer defaults to 0 mph (0 kph) if a malfunction in the vehicle speed sensor circuit exists.
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:
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The PCM detects a malfunction in the engine speed sensor circuit.
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The IPC detects a loss of class 2 communications with the PCM.
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the tachometer and speedometer are frozen in place and the lights on the dashboard and console are out
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