2010 Cadillac Truck SRX FWD V6-3.0L Page 1514
percentage of remaining fuel in the tank. The ECM sends the fuel level percentage via High Speed CAN-Bus to the body control module (BCM).
The BCM then sends the fuel level percentage via Low Speed CAN-Bus to the instrument cluster in order to control the fuel gauge.
Conditions for Running the DTC
* The engine is running
* The system voltage is between 11-16 V
Conditions for Setting the DTC
P0461 or P2066
* The ECM detects a difference between the fuel consumed by the engine and change of the fuel level signal of less than 1 L (0.26 gal) over a
range of 30 L (7.92 gal) or 45.6% of the primary fuel tank.
* The above condition is present for about 300 seconds.
P0462 or P2067
* The signal voltage is less than 0.25 V.
* The above conditions must be met for 5 seconds.
P0463 or P2068
* The signal voltage is greater than 4.7 V.
* The above conditions must be met for 5 seconds.
P0464
* The fuel level change is greater than 10%.
* The above conditions must be met for 30 seconds.
* DTC P0464 runs and fails 2 out of 3 test cycles.
Action Taken When the DTC Sets
* P0461, P0462, P0463, P0464, P2066, P2067 and P2068 are Type B DTCs
* The fuel gauge defaults to empty
* The low fuel indicator illuminates
Conditions for Clearing the DTC
* P0461, P0462, P0463, P0464, P2066, P2067 and P2068 are Type B DTCs
* The DTC becomes history when the conditions for setting the DTC are no longer present.
* The history DTC clears after 40 malfunction-free warm-up cycles.
Reference Information
Schematic Reference
Instrument Cluster Schematics (See: Diagrams/Electrical Diagrams/Instrument Panel, Gauges and Warning Indicators/System Diagram/Instrument
Cluster Schematics)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
Instrument Cluster Description and Operation (See: Instrument Panel, Gauges and Warning Indicators/Description and Operation/Instrument
Cluster)
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
