2010 Cadillac Truck SRX FWD V6-3.0L Page 2022
Conditions for Running the DTC
* The engine speed is greater than 80 RPM.
* The ignition voltage is between 10-18 V.
* The ECM has commanded the air pump relay ON and OFF at least once during the ignition cycle.
* The DTCs run continuously when the above conditions are met.
Conditions for Setting the DTC
P0418
The ECM detects the secondary air injection pump relay control circuit is open.
P2257
The ECM detects the secondary air injection pump relay control circuit is shorted to ground.
P2258
The ECM detects the secondary air injection pump relay control circuit is shorted to voltage.
Action Taken When the DTC Sets
DTC P0418, P2257, and P2258 are Type B DTCs.
Conditions for Clearing the DTC
DTC P0418, P2257, and P2258 are Type B DTCs.
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)
Description and Operation
Secondary Air Injection System Description (See: Powertrain Management/Emission Control Systems/Air Injection/Description and Operation)
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
Note: Do not run SAIR pump for more than 1-2 minutes at a time. Running for an extended period of time without allowing pump to cool
may cause damage to the pump.
1. Ignition ON, command the secondary air injection pump relay ON and OFF with a scan tool. You should hear an audible click or the
secondary air injection pump should turn ON and OFF.
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.
