A/C - Ticking Noise From Center of Dash Panel
87 07 05May 30, 2007
2013315/3, Supersedes Technical Service Bulletin Group 87 number 07-01 dated January 19, 2007 due to insertion of VIN break in header data within ElsaWeb.
Models
Ticking Noise Behind The Dash Panel Or Center Console
Condition
Ticking noise behind the dash panel or center console. The ticking noise is more noticeable with the radio volume set low and climate system fan set to low speeds.
Technical Background
Excessive free play present within the mechanical portion of the Delphi stepper motor for the climate system.
Production Solution
Optimized stepper motor for the climate system in production.
Service
Verify customers complaint of a ticking noise when climate system is making adjustments via the stepper motors.
Tip:
Only Delphi stepper motors are affected.
Tip:
The movement of stepper motor(s) can be initialized by small adjustments to the temperature settings in the AUTO mode. The change causes the stepper motors to make adjustments. When the motors come near to their desired position, they will make adjustments in smaller increments. That would be the best time to notice the ticking noise. The movement of the stepper motor(s) can also be monitored in the appropriate Measuring Value Block in the 08 Front climate control module.
If the complaint can be verified, repair the vehicle as follows:
1. Locate which stepper motor(s) is causing the ticking noise.
2. Replace only the stepper motor causing the customer's concern. Replace with a stepper motor produced after 100906 (Figure 1).
Follow the repair instruction outlined in ELSA under Audi A7 Climate repairs.
3. Perform Basic Setting of the adjuster motors once the repairs are complete.
Tip:
Motors made by BOSCH/Delphi are not affected.
Do not replace motors made by BOSCH/Delphi (Figure 2).
Warranty
Required Parts and Tools
All part and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Dept. and service manuals for the latest information.