Wednesday, January 22, 2020

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1513

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1513



DTC P0698



- 5 V Reference 3 Circuit Low Voltage



DTC P0699



- 5 V Reference 3 Circuit High Voltage



Circuit/System Description



The engine control module (ECM) has 3 internal 5 V reference circuits. Each internal reference circuit provides external 5 V reference circuits for



more than one sensor. A short to ground or short to voltage on one external 5 V reference circuit can affect all the components connected to the



same internal 5 V reference circuit.



Conditions for Running the DTC



* The ignition is ON for greater than 3 s.



* DTCs P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699 run continuously when the above condition is met.



Conditions for Setting the DTC



The 5 V reference circuit voltage is above or below a predetermined threshold for greater than 1 s or for a cumulative of 10 s.



Action Taken When the DTC Sets



DTCs P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699 are Type A DTCs.



Conditions for Clearing the DTC



DTCs P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699 are Type A DTCs.



Diagnostic Aids



The 5 V reference 1, 2, and 3 circuits provide 5 V to the following sensors:



P0641, P0642, and P0643



* Economy mode switch



* Turbocharger pressure sensor



* Secondary air injection (AIR) pressure sensor



* Engine oil pressure (EOP) sensor



* Fuel tank pressure sensor



P0651, P0652, and P0653



* All four camshaft position sensors



* Accelerator pedal position (APP) sensor 1



P0697, P0698, and P0699



* Throttle position sensor 1 and 2



* Crankshaft position sensor



* Accelerator pedal position (APP) sensor 2



* A/C refrigerant pressure sensor



It may be possible to locate the fault by disconnecting one component at a time from the 5 V reference circuit while viewing the 5 V Reference



Circuit parameter on the scan tool. The scan tool parameter will change from Malfunction to OK when the source of the fault is disconnected. If all



5 V reference components have been disconnected and a fault is still indicated, the fault may exist in the wiring harness.



Reference Information



Schematic Reference



Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics



(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)



Connector End View Reference



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



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

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