Saturday, April 9, 2022

2010 Cadillac Truck SRX FWD V6-3.0L Page 1140

2010 Cadillac Truck SRX FWD V6-3.0L Page 1140



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



DTC or a driveability condition. Refer to Temperature Versus Resistance - Engine Coolant Temperature Sensor (See: Powertrain



Management/Computers and Control Systems/Specifications/Temperature Versus Resistance - Engine Coolant Temperature Sensor).



* If the vehicle has sat overnight, the IAT sensor and the ECT sensor values should display within 3掳C (5掳F).



* After starting a cold engine, the ECT sensor temperature should rise steadily, then stabilize after the thermostat opens.



* High resistance in the circuits of either the ECT or IAT sensor could set a DTC.



* DTC's must be cleared before Engine Cooling Fan's are Commanded Off.



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



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



DTC Type Reference



Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code



(DTC) Type Definitions)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



1. Engine idling for 1 min. Observe the DTC information with a scan tool. DTCs P0117 and P0118 should not set.



2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the



conditions that you observed from the Freeze Frame/Failure Records data.



Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at the B34 ECT sensor.



Caution: Do NOT use a test lamp to test the continuity of the circuit. Damage to the control module may occur due to excessive current



draw.



Note: The control module or the sensor may be damaged if the circuit is shorted to battery positive voltage.

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