Some 2004-07 Infiniti QX56 SUVs, 2006-07 M35/45 sedans and 2007 G35 sedans with intelligent cruise control may simultaneously turn on the brake warning, slip indicator and VDC "off" lights on the dashboard. Two possible causes, Infiniti says, are a low brake fluid level and a misadjusted brake pedal switch. Both conditions should store a trouble code.
A low fluid level should log DTC C1155 in the ABS module. This code usually stores when the brake pads are worn, although a brake fluid leak also is possible. Correcting the cause of the low fluid condition should turn off all the warning lights.
A misadjusted brake switch will store DTC C1142 in module memory. In most cases, a simple adjustment of the switch should turn off the warning lamps. Check a repair manual for the specifics of the procedure.
You may also see DTCs C1185, C1A26 and C1A 04 stored in combination with the above codes. Usually, these codes are ghost codes, and aren't cause for concern. To check things out, erase the codes with your scan tool, then go on a road test to make sure they don't return.
"Factory Fixes" is written by Jim DePalma, a 30-year veteran of the auto repair business who has worked as a service manager, parts manager and ASE-certified technician. His column provides vehicle manufacturers' factory technical service bulletins (TSBs) that have been condensed for easier reading. Mr. DePalma advises that techs always check with a dealer or repair information system for the latest revisions before starting to work on a vehicle. He can be reached via e-mail at [email protected].