Wednesday, December 4, 2019

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Technical Service Bulletin # 07-08-46-002D Date: 090729

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Technical Service Bulletin # 07-08-46-002D Date: 090729



Audio System - Noise When Using OnStar(R)



TECHNICAL



Bulletin No.: 07-08-46-002D



Date: July 29, 2009



Subject: Audio Whine Noise from Radio Speakers When Using OnStar(R) (Install Noise Suppression Filter)



Models:



2007-2010 GM Passenger Cars and Trucks (Including Saturn)



2007-2010 HUMMER H2, H3



2007-2009 Saab 9-7X



Equipped with OnStar(R) (RPO UE1)



Supercede:



This bulletin is being revised to update the Warranty Information. Please discard Corporate Bulletin Number 07-08-46-002C (Section 08 - Body



and Accessories).



Condition



Some customers may comment on an audio whine coming from the radio speakers when using the OnStar(R) system. The amplitude and frequency



of the whine will change with an increase or decrease in engine speed.



Cause



This condition may be caused by electrical noise on the OnStar(R) Vehicle Communication Interface Module (VCIM) battery feed wire being



passed to the microphone output pins at the radio.



Correction



Technicians are to install a noise suppression filter, P/N 1224205, into the OnStar(R) battery voltage circuit, a few centimeters (inches) from the



VCIM. The filter package has three attached wires - a single yellow wire at one end with a yellow wire and a black wire at the other. Install the



single yellow wire side into the battery voltage circuit towards the VCIM. Install the remaining single yellow wire into the battery voltage circuit



2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 262



toward the fuse and the black wire to ground.



Important



The noise suppression filter is polarity sensitive. The filter is designed to be most effective when the end with the capacitor ground is



connected towards the source of the electrical noise. Install the filter in this polarity first. If the noise level is still not satisfactory, try



disconnecting the capacitor ground. In some cases, if the first installation does not correct the noise, try reversing the filter polarity



(removing the filter, turning it end for end and then reinstalling it) and grounding the capacitor lead.



Parts Information



Warranty Information (excluding Saab U.S. Models)



For vehicles repaired under warranty, use the table above.



Warranty Information (Saab U.S. Models)

No comments:

Post a Comment