Monday, December 2, 2019

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1077

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1077



Circuit/System Description



The throttle body assembly contains 2 throttle position sensors. The throttle position sensors are mounted to the throttle body assembly and are not



serviceable. The throttle position sensors provide a signal voltage that changes relative to throttle blade angle. The engine control module (ECM)



supplies the throttle position sensors with a common 5 V reference circuit , a common low reference circuit, and two independent signal circuits.



The throttle position sensors have opposite functionality. Throttle position sensor 1 signal voltage decreases from greater than 4 V at idle to less



than 1 V at wide open throttle (WOT). Throttle position sensor 2 signal voltage increases from less than 1 V at idle to greater than 4 V at WOT.



Conditions for Running the DTC



P0121



* The engine speed is greater than 480 RPM.



* The vehicle speed is 0 km/h (0 mph).



* The engine coolant temperature is greater than 5掳C (41掳F).



* The ignition voltage is greater than 8 V.



* The intake air temperature is greater than 5掳C (41掳F).



* DTC P0121 runs continuously when the above conditions are met.



P0122, P0123, P0222, and P0223



* The vehicle speed is 0 km/h (0 mph).



* The engine speed is greater than 250 RPM.



* The engine coolant temperature is greater than 5掳C (41掳F).



* The intake air temperature is greater than 5掳C (41掳F).



* The ignition voltage is greater than 8 V.



* The ignition is ON, with the engine OFF, or the engine is operating.



* DTC P0122 runs continuously when the above conditions are met.



P0221



* The engine speed is greater than 480 RPM.



* The vehicle speed is 0 km/h (0 mph).



* The engine coolant temperature is greater than 5掳C (41掳F).



* The ignition voltage is greater than 8 V.



* The intake air temperature is greater than 5掳C (41掳F).



* DTC P0221 runs continuously when the above conditions are met.



Conditions for Setting the DTC



P0121



The throttle position sensor 1 disagrees greater than 9 % from throttle position sensor 2, or throttle position sensor 1 disagrees greater than 9 %



from the predicted value for greater than 1 s or a cumulative of 4 s.



P0122



The ECM detects the throttle position sensor 1 signal voltage is less than 0.18 V for greater than 1 s or a cumulative of 4 s.



P0123



The ECM detects the throttle position sensor 1 signal voltage is greater than 4.6 V for greater than 1 s or a cumulative of 4 s.



P0221



The throttle position sensor 2 disagrees greater than 9 % from throttle position sensor 1, or throttle position sensor 2 disagrees greater than 9 %



from the predicted value for greater than 1 s or a cumulative of 4 s.



P0222



The ECM detects the throttle position sensor 2 signal voltage is less than 0.16 V for greater than 1 s or a cumulative of 4 s.

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