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NHTSA Engineering Analysis EA13005

Engineering Analysis · Brake Light Switch/Sensor Malfunction · Opened 2013-06-06 · Closed 2014-07-01

Investigation

Action number
EA13005
Type
Engineering Analysis
Open date
2013-06-06
Close date
2014-07-01
Manufacturer
General Motors, LLC
Affected makes
PONTIAC
Affected components
EXTERIOR LIGHTING; EXTERIOR LIGHTING:BRAKE LIGHTS; EXTERIOR LIGHTING:TAIL LIGHTS
Affected model years
2005, 2006, 2007, 2008
Affected (make, year) variants
12

Summary

On May 14, 2014 General Motors (GM) announced a recall action (14V-252) involving model year (MY) 2004-12 Chevrolet Malibu, MY 2004-07 Malibu Maxx, MY 2005-10 Pontiac G6 and MY 2007-10 Saturn Aura vehicles.An increased resistance can develop in the Body Control Module connection systems and result in voltage fluctuations in the Brake Apply Sensor (BAS, or brake light switch) circuit that can cause the brake lamps to malfunction.As a result, and according to GM, the brake lamps may illuminate when pedal application is not being applied or may not illuminate when pedal force is applied.Additionally, the cruise control may not engage or if it is engaged it may require increased pedal travel to disengage.Pedal application may not be required to move the shift lever out of PARK or additional travel may be required to move the shift lever out of PARK. Traction control, electronic stability control (ESC) and panic brake assist features may also become disabled. These failure conditions may increase the risk of a crash.The Office of Defects Investigation (ODI) opened Engineering Analysis EA13-005 on June 6, 2013 to further investigate complaints alleging that the brake lights did not operate properly on MY 2005-08 Pontiac G6 vehicles.The BAS in these vehicles produces a single analog voltage output proportional to the brake pedal's position.The BAS signal is used by various systems to determine both pedal position and rate of displacement, so a failure or inaccuracy of the signal may affect multiple systems.ODI also received similar complaints on MY 2009 Pontiac G6, MY 2004-11 Chevrolet Malibu and MY 2007-09 Saturn Aura vehicles that use the same BAS.All of these above models were included in the subject vehicle population of ODI's Information Request (IR) letter to GM.Prior to the recall announcement date, ODI received 855 reports of brake light malfunction resulting in one or several of the failure conditions.Eight (8) of the reports alleged crashes, with 1 resulting in a

Source

Authoritative
NHTSA ODI investigation page
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