Hello I'm working on a 2013 Prius C. All brake warning lights are on Code C1256.. low accumulator brake pressure All fuses are good I'm not getting constant 12 Volts to the accumulator connector I'm actually getting 1.76Volts The pump is not being turned on and hence not pressurizing the system and throwing this code My question is can anyone here provide a repair manual for this vehicle or guide me next where to check for this drop in voltage or signal. does the skid control ecu command this circuit?
This wiki page has information on access to the Repair Manual and the Electrical Wiring Diagram. In the US, we would go to techinfo.toyota.com. I am not sure of the right destination for Trinidad and Tobago. (If the car was imported from another market, it might work best to use the Toyota site for the origin market.) According to my (US) Gen 3 liftback manuals, the accumulator should have two ground wires (white with black stripe) and two +12 supply wires (solid black), and these come directly from the skid ECU, which is integral with the master cylinder/actuator, and the relays are inside it. Power supplying those relays comes from ABS MTR 1 and ABS MTR 2 fuses. But I don't know how much of that carries over to the c.
thank you for the info. I checked the wires and they do come from the abs booster aka brake ecu etc im suspecting the booster as an issue here now
replaced booster and accumulator, performed complete bleeding, linear valve and stroke works excellent
