Supporting Vendors / Dealers - Advertising - Shop

2009 - 2011 Corvette: GM TechLink: Electronic Brake Control Module Communication

Source: GM Techlink

Date: October 2010

Subject:  Electronic Brake Control Module Communication

Models: 2009 - 2011 Chevrolet Corvette

On some 2008-2011 Enclave; 2007-2011 Escalade, Escalade ESV, Escalade EXT, Avalanche, Silverado, Suburban, Tahoe, Acadia, Sierra, Yukon, Yukon XL, Yukon Denali, Yukon Denali XL; 2009 XLR; 2010-2011 Camaro; 2009-2011 Corvette, Traverse; 2008-2009 G8; and 2007-2010 OUTLOOK models, with StabiliTrak (JL4), the ABS MIL and red Brake MIL may be illuminated on the instrument cluster.

When trying to retrieve DTCs for this condition, the scan tool will not communicate with the Electronic Brake Control Module (EBCM), but will communicate with all other high and low speed GM LAN modules. Some modules may have set a DTC U0121 against the EBCM.

During diagnostics, the power circuits, ground circuits, communication enable signal circuit, and GM LAN circuits going to the EBCM may test OK, which may lead to replacement of the EBCM. However, the condition may still be present after installing the new EBCM.

This condition may be caused by shorted yaw rate and lateral acceleration sensor supply voltage (circuit 2087, dark green) pulling down the internal circuitry of the EBCM. If circuit 2087 is backed out of the EBCM connector and communication returns, inspect for this circuit shorted to ground or a yaw sensor concern.

On some full-size utility vehicles, the circuit may be shorted under the passenger front seat at the rear camera module bracket.

Repair the circuit as necessary and reroute to prevent the condition from reoccurring.

- Thanks to Ron Erman

0 (0)
Article Rating (No Votes)
Rate this article
Attached Files
There are no attachments for this article.
Comments
There are no comments for this article. Be the first to post a comment.
Name
Email
Security Code Security Code
Related Articles RSS Feed
2010 Corvette: GM TechLink: Corvette Battery Charger Accessory
Viewed 1601 times since Wed, Jul 2, 2014
2005 - 2013 Corvette: Service Bulletin: #PIC5049A: Fuel Tank Hard to Fill Or Displays 1/2 Tank After Filling - (Oct 22, 2012)
Viewed 574 times since Tue, Mar 14, 2017
2003 - 2005 Corvette: Service Bulletin: Erratic Fuel Gauge Readings, Fuel Gauge Reads Empty When There Is Fuel In Tank, DTC P0463 Set, Service Fuel System Message Displayed
Viewed 3813 times since Sun, Jul 13, 2014
2005 - 2006 Corvette: Service Bulletin: Information on Visual Brake Rotor Surface Cracking
Viewed 814 times since Mon, Jul 14, 2014
2007 - 2013 Corvette: Service Bulletin: SES Lamp P0521 Setting After An Oil Change And Or Low Oil Pressure Indicated On The Instrument Panel
Viewed 725 times since Thu, Jun 9, 2016
2008 Corvette: Customer Satisfaction Program: Keyless Access System Inoperative
Viewed 1239 times since Sun, Jul 13, 2014
2006 Corvette: Electrical Schematic: Starting - Charging System
Viewed 1087 times since Tue, Jul 15, 2014
2005 Corvette: GM TechLink: Setting the Clock Radio
Viewed 1768 times since Fri, Jul 18, 2014
2005 Corvette: Service Bulletin: Poor and/or No Radio Reception, Intermittent Static on FM with Navigational Radio System (Update Radio Software)
Viewed 5180 times since Fri, Jul 18, 2014
2005 - 2012 Corvette: Service Bulletin: #PIC5485A: Noticeable Difference In Audio Volume Level When Selecting Favorites Or Switching Between The AM/FM Bands CD And/Or XM - (Oct 24, 2011)
Viewed 465 times since Tue, Mar 21, 2017