Ok, I found it on page 502 of the current online version:This is a total guess, but I do remember something in the manual about two hydraulic systems and there being pedal softness if one wasn’t working.
“Your vehicle is equipped with dual hydraulic brake sys- tems. If either of the two hydraulic systems loses normal capability, the remaining system will still function. How- ever, there will be some loss of overall braking effective- ness. You may notice increased pedal travel during appli- cation, greater pedal force required to slow or stop, and potential activation of the Brake Warning Light.”
If find odd the fact that Brake Warning Light would only potentially activate if one of the hydraulic systems malfunctioned.