Monday, December 6, 2021

2010 Cadillac Truck SRX FWD V6-3.0L Page 1547

2010 Cadillac Truck SRX FWD V6-3.0L Page 1547



DTC P0522



- Engine Oil Pressure Sensor Circuit Low Voltage



DTC P0523



- Engine Oil Pressure Sensor Circuit High Voltage



Diagnostic Fault Information



Circuit/System Description



The engine oil pressure sensor changes voltage based on the engine oil pressure. The engine oil pressure sensor is a 3-wire sensor comprised of the



signal circuit, the low reference circuit and the 5 V reference circuit. The engine control module (ECM) supplies 5 V to the engine oil pressure



sensor via the 5 V reference circuit and provides ground via the engine oil pressure sensor low reference circuit. The ECM monitors the signal



circuit of the engine oil pressure sensor to determine the engine oil pressure sensor voltage is within the normal operating range of approximately



1-4 V. When the engine oil pressure is high, the engine oil pressure sensor voltage is high and the sensor senses a high signal voltage. When the



engine oil pressure is low, the engine oil pressure sensor voltage is low and the ECM senses a low signal voltage. The ECM sends the engine oil



pressure sensor information via High Speed CAN-Bus to the body control module (BCM). The BCM then sends the engine oil pressure sensor



information via Low Speed CAN-Bus to the instrument cluster.



Conditions for Running the DTC



The engine is running



Conditions for Setting the DTC



P0521



* The engine oil pressure is out of its working range.



* The ECM does not detect a change in the engine oil pressure.



* The above condition is present over a predetermined variance of engine speed.



P0522



* The ECM detects a short to ground in the engine oil pressure signal circuit.



* The above condition is present for greater than 10 seconds.



P0523



* The ECM detects a short to voltage or an open circuit in the engine oil pressure signal circuit.



* The above condition is present for greater than 10 seconds.



Action Taken When the DTC Sets



The instrument cluster illuminates the service vehicle soon indicator.



Conditions for Clearing the DTC



The DTC becomes history when the conditions for setting the DTC are no longer present.



Reference Information



Schematic Reference



Instrument Cluster Schematics (See: Diagrams/Electrical Diagrams/Instrument Panel, Gauges and Warning Indicators/System Diagram/Instrument



Cluster Schematics)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)



Description and Operation



* Instrument Cluster Description and Operation (See: Instrument Panel, Gauges and Warning Indicators/Description and



Operation/Instrument Cluster)



* Indicator/Warning Message Description and Operation (See: Instrument Panel, Gauges and Warning Indicators/Description and



Operation/Indicator/Warning Message)



* Driver Information Center (DIC) Description and Operation (See: Instrument Panel, Gauges and Warning Indicators/Description and



Operation/Driver Information Center (DIC))

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