Sunday, May 29, 2022

2010 Cadillac Truck SRX FWD V6-3.0L Page 1142

2010 Cadillac Truck SRX FWD V6-3.0L Page 1142



Typical Scan Tool Data



Circuit Description



The engine coolant temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. The engine control module



(ECM) supplies 5 V to the ECT signal circuit and supplies a ground to the low reference circuit.



The following table illustrates the difference between temperature, resistance, and voltage:



Conditions for Running the DTC



P0117



* The engine is operating.



* The start up intake air temperature (IAT) is less than 72掳C (161掳F).



OR



* The start up intake air temperature (IAT) is greater than 72掳C (161掳F).



* The engine run time is greater than 59 s.



* The DTC runs continuously once the above conditions are met.



P0118



* The ignition is ON or the engine is operating.



* The DTC runs continuously once the above condition is met.



Conditions for Setting the DTC



P0117



The ECM detects that the ECT is greater than 140掳C (284掳F) for greater than 1 s or a cumulative of 10 s.



P0118



The ECM detects that the ECT is less than -39掳C (-38掳F) for greater than 1 s or a cumulative of 10 s.



Action Taken When the DTC Sets



DTC P0117 and P0118 are Type B DTCs.



The ECM may activate the Cooling Fans at high speed.



Conditions for Clearing the MIL/DTC



DTC P0117 and P0118 are Type B DTCs.



Diagnostic Aids



* Test the ECT sensor at various temperature levels in order to evaluate the possibility of a skewed sensor. A skewed sensor can result in a

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