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Ted G.
Ted G., ASE Certified Technician
Category: Nissan
Satisfied Customers: 6091
Experience:  20 years auto repair experience, ASE Master Tech, Expert Witness
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1993 nissen pathfinder when car is off brake pedal is hard

Customer Question

1993 nissen pathfinder when car is off brake pedal is hard when car is on pedal is soft and goes to floor
Submitted: 1 year ago.
Category: Nissan
Expert:  Ted G. replied 1 year ago.

Does the truck have ABS?

Expert:  Ted G. replied 1 year ago.

Never mind, I looked it up for 93 it looks like you had rear ABS only. On the passenger side frame rail you will find the ABS modulator. On it there is a bleeder valve. You need to bleed it down also as it sounds like you have air in there that is entering the rest of the system when the modulator self checks (when you turn the truck on). This causes the pedal to drop.

Customer: replied 1 year ago.
I did that already.
Expert:  Ted G. replied 1 year ago.

Okay. Unplug that modulator and see if the brakes stay up. If they do the modulator has failed.

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