2010 Cadillac Truck SRX AWD V6-3.0L Page 2022

2010 Cadillac Truck SRX AWD 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.