Beep sound for B Mode?

are you good at electrical schematics? i'm thinking the wire that goes from the shifter to the ecu for b mode could be tapped and a beeper hooked in.

 

if your going to the dealer, the tech will already know, or can look it up on tech stream

 

There is no such wire. See pages 12 and 13 of the diagram kindly shared by @Georgina Rudkus in another thread, which show the Hall-effect sensors used to detect the shift and select positions of the lever. The selected shift position is maintained in the power management control ECU.

An alternative would be to reverse engineer the combination meter assembly, which has the shift position indicator, or its CAN bus communication with the power management control ECU.

The Repair Manual (more info) lists the parameters that can be customized, and unlike the setting for the reverse buzzer, that isn’t one of them.

 

I wouldn’t expect a Toyota dealer, or indeed any automotive repair shop, to have the capability to design such a modification, or much interest in doing so. This would be a task for an electronics engineer, or at least a motivated hobbyist with similar skills.

 

Yeah I mean no disrespect, but you're probably the first person on the planet to be seeking this mod.

 

No ordinary dealer or auto shop would touch this. It is beyond their skill and equipment level, and likely has negligible financial return.

The operation of and detection through the Hall-effect sensors is handled internally by a mixture of digital and analog circuits built into the Power Management ECU. Whether or not a special-purpose piggy-back circuit could tap in on those lines and figure the required information, without interfering with the ECU's own operation, is unknown here. Merely 'snooping' would be best, but may not produce sufficient information. Actively driving the sense lines while the ECU has them at idle might be required, but the risk of interference is high. There might not even be any idle time for snoopers to use.

The details are almost certainly locked up as Toyota proprietary design information. Hobbyists skilled with this type of sensor might be able to figure out how to do it. But finding any of them, with enough interest to look at this, will be an exercise for the reader. I'd expect them to be busy with higher value projects, and hanging out in some other forum.

 

I looked in Toyota document RM1290U, the Repair Manual for 2010 Prius cars sold in the U.S., in the topic General: Introduction: Repair Instruction: Customize Parameters.

 

74 posts and no answers

 

when i click on the one in the header, a bunch come up at the bottom to choose from.

where people get the ones beyond those, is above my pay grade

 

Finding a way to reprogram the brain of car will most likely be the answer. It will be like extending the EV mode before ICE kicks in. Don't hold your breathe.

 

Go to Japan. Find the software team for Toyota. Ask them to reprogram the ECU so you the
"B" on the shift knob means "BEEP"!

 

Better yet: sell the Prius and get a gasser with a manual transmission, then you'll be a happy camper again....

 

No, because there will still be no BEEP for B!