Dorman 306-023 Secondary Air Injection Pump Instruction Manual

1. Product Overview

The Dorman 306-023 Secondary Air Injection Pump is a direct replacement component designed to match the fit and function of the original pump in specified vehicle applications. This unit is engineered to restore the functionality of the vehicle's emissions system, specifically addressing issues related to a leaking or failed original pump.

Key features include:

• Direct Replacement: Designed to match the original equipment's fit and function.
• Functionality Restoration: Replaces original parts that have failed due to internal component issues or leaks.
• Durable Construction: Manufactured from quality materials for reliable performance and extended service life.

2. Compatibility

This secondary air injection pump is compatible with the following Mercedes-Benz models and years. Always verify fitment using your vehicle's make, model, and trim level before installation.

• Mercedes-Benz C240: 2002, 2003, 2004, 2005
• Mercedes-Benz C280: 1998, 1999, 2000
• Mercedes-Benz C32 AMG: 2002, 2003, 2004
• Mercedes-Benz C320: 2002, 2003, 2004, 2005
• Mercedes-Benz CL500: 2000-2006
• Mercedes-Benz CL55 AMG: 2001-2006
• Mercedes-Benz CLK320: 1998-2005
• Mercedes-Benz CLK430: 1999-2003
• Mercedes-Benz CLK500: 2003, 2004
• Mercedes-Benz CLK55 AMG: 2001, 2004, 2005
• Mercedes-Benz CLS500: 2006
• Mercedes-Benz CLS55 AMG: 2006
• Mercedes-Benz E320: 1998-2005
• Mercedes-Benz E430: 1998-2002
• Mercedes-Benz E500: 2003-2006
• Mercedes-Benz E55 AMG: 1999-2006
• Mercedes-Benz G500: 2002-2005, 2007
• Mercedes-Benz G55 AMG: 2003-2005
• Mercedes-Benz ML320: 1998-2003
• Mercedes-Benz ML350: 2003-2006
• Mercedes-Benz ML430: 1999-2001
• Mercedes-Benz ML500: 2002-2007
• Mercedes-Benz ML55 AMG: 2000-2003
• Mercedes-Benz R500: 2006, 2007
• Mercedes-Benz S350: 2006
• Mercedes-Benz S430: 2000-2006
• Mercedes-Benz S500: 2000-2006
• Mercedes-Benz S55 AMG: 2001-2006
• Mercedes-Benz SL500: 1999-2006
• Mercedes-Benz SLK320: 2001, 2003, 2004

3. Setup and Installation

Installation of the Dorman 306-023 Secondary Air Injection Pump requires specific automotive knowledge and tools. It is highly recommended that installation be performed by a qualified automotive technician.

General Installation Guidelines (Consult Service Manual for Specifics):

1. Safety First: Ensure the vehicle is turned off, cooled down, and properly secured on a lift or jack stands. Disconnect the battery's negative terminal.
2. Locate the Existing Pump: Identify the secondary air injection pump on your vehicle. Refer to your vehicle's service manual for the exact location.
3. Disconnect Connections: Carefully disconnect electrical connectors, air hoses, and mounting hardware from the old pump.
4. Remove Old Pump: Detach and remove the faulty secondary air injection pump.
5. Install New Pump: Position the Dorman 306-023 pump in place. Secure it with the appropriate mounting hardware.
6. Reconnect: Reattach all air hoses and electrical connectors. Ensure all connections are secure and free of leaks.
7. Final Checks: Reconnect the battery. Start the vehicle and check for proper operation and any diagnostic trouble codes. Clear any stored codes if necessary.

Note: Always refer to your specific vehicle's factory service manual for detailed, step-by-step installation procedures and torque specifications.

4. Operation

The secondary air injection pump is a component of your vehicle's emissions control system. Its primary function is to pump fresh air into the exhaust stream during cold starts. This additional air helps to rapidly heat the catalytic converter to its operating temperature, allowing it to efficiently reduce harmful emissions. Once the engine reaches a certain operating temperature, the pump typically deactivates.

5. Maintenance

The Dorman 306-023 Secondary Air Injection Pump is designed for durability and typically requires no routine maintenance. However, regular inspection of the surrounding components can help ensure its longevity:

• Hose Inspection: Periodically check all connected air hoses for cracks, leaks, or signs of deterioration.
• Electrical Connections: Ensure electrical connectors are clean, secure, and free from corrosion.
• Filter Check: Some systems may have an air filter for the pump. Consult your vehicle's service manual for filter inspection and replacement intervals.
• Environmental Factors: Keep the area around the pump free from excessive dirt, debris, or moisture.

6. Troubleshooting

If you experience issues related to your secondary air injection system, common symptoms may include a 'Check Engine' light illuminated on your dashboard, accompanied by specific diagnostic trouble codes (DTCs) related to the secondary air injection system (e.g., P0410, P0411).

Common Issues and Potential Causes:

• Pump Failure: The pump itself may fail due to internal motor issues, water intrusion, or electrical problems.
• Hose Leaks/Blockages: Cracks in hoses or blockages can prevent proper airflow.
• Valve Malfunction: The check valves or switching valves in the system can stick open or closed.
• Electrical Issues: Faulty wiring, connectors, or a blown fuse can prevent the pump from operating.

If you suspect a malfunction, it is recommended to have the vehicle diagnosed by a professional technician using appropriate diagnostic tools. Attempting repairs without proper knowledge can lead to further damage or incorrect diagnosis.

7. Specifications

8. What's in the Box

• 1 x Dorman 306-023 Secondary Air Injection Pump

9. Product Images

10. Warranty and Support

For information regarding product warranty, technical support, or further assistance, please refer to the official Dorman Products website or contact Dorman customer service directly. Warranty terms and conditions may vary.

You can visit the Dorman Store for more products and information: Dorman Official Store