2010 Cadillac Truck Escalade RWD V8-6.2L Page 2533
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 P2632
- Fuel Pump Relay 2 Control Circuit
Diagnostic Fault Information
Circuit/System Description
The control module enables the secondary fuel pump relay when the ignition switch is turned ON. The control module will disable the secondary
fuel pump relay within 2 seconds unless the control module detects ignition reference pulses. The control module continues to enable the secondary
fuel pump relay as long as ignition reference pulses are detected. The control module disables the secondary fuel pump relay within 2 seconds if
ignition reference pulses cease to be detected and the ignition remains ON.
The control module monitors the voltage on the secondary fuel pump relay control circuit. If the control module detects an incorrect voltage on the
secondary fuel pump relay control circuit, a fuel pump relay 2 control DTC sets.
Conditions for Running the DTC
* The ignition voltage is between 9-18 volts.
* DTC P2632 runs continuously when the above condition is met.
Conditions for Setting the DTC
* The control module detects that the commanded state of the driver and the actual state of the control circuit do not match.
* The above condition is met for a minimum of 2.5 seconds.
Action Taken When the DTC Sets
DTCs P2632 is a Type B DTC.
Conditions for Clearing the MIL/DTC
DTCs P2632 is a Type B DTC.
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
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)
