2010 Cadillac CTS Sedan AWD V6-3.6L Page 989

2010 Cadillac CTS Sedan AWD V6-3.6L Page 989

DTC P0092

- Fuel Pressure Regulator Control Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

High pressure fuel is regulated by the high pressure fuel pump actuator, which is a part of the high pressure fuel pump. The high pressure fuel pump

actuator is a solenoid valve. The ECM provides battery voltage on the actuator high control circuit and ground on the actuator low control circuit.

Both circuits are controlled through output drivers within the ECM. When deactivated, both drivers are disabled. When activated, the high control

circuit driver energizes the high pressure fuel pump actuator and the low control circuit driver pulse-width modulates (PWM) the low control circuit

to ground.

Conditions for Running the DTC

* DTC P0641, P0642, or P0643 is not set.

* The ignition 1 signal parameter is between 10-18 V.

* DTCs P0090, P0091, and P0092 run continuously when the conditions above are met for greater than 2 s.

Conditions for Setting the DTC

P0090

* The high pressure fuel pump actuator voltage is between 2.7-4.5 V with the actuator commanded OFF.

* The above condition is present for greater than 5 s.

P0091

* The high pressure fuel pump actuator voltage is less than 2.7 V with the actuator commanded OFF.

* The above condition is present for greater than 5 s.

P0092

* The high pressure fuel pump actuator voltage is greater than 4.5 V with the actuator commanded ON.

* The above condition is present for greater than 5 s.

Action Taken When the DTC Sets

* DTCs P0090, P0091, and P0092 are Type A DTCs.

* A message center or an indicator displays Reduced Engine Power.

Conditions for Clearing the DTC

DTCs P0090, P0091, and P0092 are Type A DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics (LLT) (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)

Description and Operation

Fuel System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Fuel System Description)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

DTC Type Reference

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