Wednesday, May 26, 2021

2010 Cadillac Truck SRX AWD V6-3.0L Page 1892

2010 Cadillac Truck SRX AWD V6-3.0L Page 1892



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions)provides an overview of each diagnostic category.



DTC Descriptor



DTC P1682



- Ignition 1 Switch Circuit 2



Diagnostic Fault Information



Typical Scan Tool Data



Circuit/System Description



There are 2 ignition voltage circuits supplied to the engine control module (ECM). The first ignition circuit is provided by the engine controls



ignition relay, or powertrain relay, through a fuse. This ignition voltage circuit supplies power to all the internal ECM circuits associated with the



throttle actuator control (TAC) operation. The second ignition voltage circuit is supplied by the run/crank relay through a fuse, and is used to power



the remaining internal ECM circuits. If the ECM detects a voltage difference between the 2 ignition voltage circuits, DTC P1682 will set.



Conditions for Running the DTC



* The ignition is ON.



* System voltage is more than 6 V.



* The powertrain relay is commanded ON.



* DTC P1682 runs continuously.



Conditions for Setting the DTC



The ECM detects that the voltage level difference is greater than 3 V between the 2 ignition voltage circuits for less than 1 s.



Action Taken When the DTC Sets



DTC P1682 is a Type A DTC.



Conditions for Clearing the DTC



DTC P1682 is a Type A DTC.



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)



* Power Distribution Schematics (See: Diagrams/Electrical Diagrams/Starting and Charging/Power and Ground Distribution/System



Diagram/Power Distribution Schematics)



Connector End View Reference



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



Electrical Information Reference

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