2010 Cadillac Truck SRX FWD V6-3.0L Page 1545

2010 Cadillac Truck SRX FWD V6-3.0L Page 1545

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))

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring