HOLDEN GEN III V8, Обучение по обслуживанию

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GEN III V8 ENGINE MANAGEMENT
ENGINE OIL PRESSURE SENSOR
The Engine Oil Pressure Sensor is screwed into
the oil gallery at the top rear of the engine block.
The sensor has a five volt reference voltage, an
earth, and a signal circuit. The PCM monitors the
voltage on the signal circuit, this voltage will vary
depending on engine oil pressure. The oil pressure
sensor is used to determine when the oil pressure
is below a certain value. By monitoring the voltage,
the PCM calculates the engine oil pressure and
determines when to turn ON the low oil warning
lamp. The low oil warning lamp will be illuminated
for two seconds when the ignition is first turned on
as a bulb check. The PCM will only command the
instruments to turn the low oil warning lamp ON, if
the oil pressure is below a specified value, this
value increases with RPM. The PCM commands
the instruments to turn on the low oil warning lamp
via the serial data bus normal mode message.
A failure in the Oil Pressure Sensor or Circuit will set one of the following DTCs:
DTC P0522 Engine Oil Pressure Sensor Low Voltage
Conditions for running DTC P0522
• The engine is running.
Conditions for setting DTC P0522
• The Engine Oil Pressure Sensor voltage is less than 0.48 volts.
Action taken when DTC P0522 Sets
• The PCM illuminates the Check Powertrain Lamp when the diagnostic runs and fails.
• The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information
in the Freeze Frame/Failure Records.
Conditions for clearing the Check Powertrain Lamp and DTC P0522
• A last test failed (Current DTC) will clear when the diagnostic runs and does not fail.
DTC P0523 Engine Oil Pressure Sensor High Voltage
Conditions for setting DTC P0523
• The engine is running.
Conditions for running DTC P0523
• The engine Oil Pressure Sensor voltage is greater than 4.5 volts.
Action taken when DTC P0523 Sets
• The PCM illuminates the Check Powertrain Lamp when the diagnostic runs and fails.
• The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information
in the Freeze Frame/Failure Records.
Conditions for clearing the Check Powertrain Lamp and DTC P0523
• A last test failed (Current DTC) will not clear when the diagnostic runs and does not fail.
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