2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1403
Perform the BCM immobilizer learn using the Body Control Module IMMO Function with Existing Transponder or Remote Key in SPS. Refer to
Immobilizer System Component Programming (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Testing and
Inspection/Programming and Relearning). The BCM should successfully complete the learn and the vehicle should start.
If vehicle starting is not restored, perform the ECM immobilizer learn using the Engine Control Module IMMO Learn in SPS. Refer to Immobilizer
System Component Programming (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Testing and Inspection/Programming
and Relearning).
P0520
DTC P0520
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions)provides an overview of each diagnostic category.
DTC Descriptor
DTC P0520
- Engine Oil Pressure Switch Circuit Malfunction
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The engine oil pressure switch is a normally closed switch that opens with the proper oil pressure. With the ignition switch turned ON and the
engine not running, the engine control module (ECM) should detect a low signal voltage input. With the engine running, the engine oil pressure
switch opens and the ECM should detect a high signal voltage input. When the oil pressure is low, the ECM sends a message via High Speed
CAN-Bus to the body control module (BCM). The BCM then sends a message via Low Speed CAN-Bus to the instrument cluster requesting the
engine oil pressure indicator turned ON.
Conditions for Running the DTC
The engine is running.
Conditions for Setting the DTC
* The ECM detects that the engine oil pressure switch signal circuit is pulled low.
* 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 and the oil pressure low indicator.
Conditions for Clearing the DTC
