Monday, December 2, 2019

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1548

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1548



DTC P0641



- 5 V Reference 1 Circuit



DTC P0642



- 5 V Reference 1 Circuit Low Voltage



DTC P0643



- 5 V Reference 1 Circuit High Voltage



DTC P0651



- 5 V Reference 2 Circuit



DTC P0652



- 5 V Reference 2 Circuit Low Voltage



DTC P0653



- 5 V Reference 2 Circuit High Voltage



DTC P0697



- 5 V Reference 3 Circuit



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

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