Engine Controls - Rushing Air Noise On Cold Start Up

01 Rushing air sound from air cleaner housing at cold start

24 10 15

2023183/1

April 6, 2010





Affected Vehicles

Condition

The sound of rushing air, similar to a secondary air pump noise, can be heard during the initial cold start for up to ninety seconds.

Technical Background

Electronic and mechanical adjustments influence the air flow characteristics in the intake system during the catalytic converter heating phase. This airflow creates sound waves that can be heard at the left front of the vehicle (air cleaner housing area).

The new software will change the air flow characteristic and reduce the noise level.

Production Solution

Service

1. Follow all instructions in the attached TSB 2011732 00 Software Version Management (SVM), operating instructions.





2. Update the instrument cluster (J285) using the SVM action code as listed in the table above if necessary.





Warranty

Required Parts and Tools

VAS Tester

Additional Information

All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service manuals for the latest information.


























Attachments - 00 Software Version Management (SVM), operating instructions