ABS, VSC, (!) and parking light problem in prius 2007

[turbo47]

When I start my prius 2007, sometimes the ABS, VSC, (!) and the red parking brake lights come ON (even when parking brake is not engaged) simultaneously along with the sound of a warning buzzer. This condition persists for an unspecified amount of time (sometimes for 3-5 seconds, sometimes for 10, 15 or may be 40-60 seconds). During this condition, the car otherwise functions well except that the brakes don't work. A day before, when I started the car after having parked it for about an hour and a half to have dinner, the ABS, VSC, (!) and the red parking lights came on along with the warning buzzer and did not go off even after waiting for a few minutes. Then when I put the car in D and started moving, the brakes didn't work as expected. I started idling at a speed of 15-30 km/h but in order to stop the car, full pressure needed to be applied on the brake paddle and even then the car would stop very slowly after covering quit a distance (for example, at 15 km/h it would stop after 20-30 meters approximately when brake paddle was fully pressed). This condition persisted for quite some time and the warning lights and the warning buzzer remained ON all the time. I traveled this way from F-7 to G-11. Then the warning lights and the buzzer went OFF suddenly by itself and the brakes and everything else worked perfectly well. It is still working well, except when starting the car the next morning the same condition persisted for a few seconds and then it was fine.

I searched the web for the problem and found that a lot of people using prius have the same problem, some suggest replacing the stop light/brake light switch, others say that it is because of the 12v battery going old. Toyota capital in isb scanned it and did some tweaking but said that a 'pressure accumulator' may need replacement if the problem persists. This condition has not occured after getting it checked from Toyota except that the ABS, VSC, (!) and red parking lights stay on for 3-5 seconds alongwith the warning buzzer upon starting the car after parking it.

Any help would be really appreciated.

[umarmuslim]

when i start my prius 2007, sometimes the abs, vsc, (!) and the red parking brake lights come on (even when parking brake is not engaged) simultaneously along with the sound of a warning buzzer. This condition persists for an unspecified amount of time (sometimes for 3-5 seconds, sometimes for 10, 15 or may be 40-60 seconds). During this condition, the car otherwise functions well except that the brakes don't work. A day before, when i started the car after having parked it for about an hour and a half to have dinner, the abs, vsc, (!) and the red parking lights came on along with the warning buzzer and did not go off even after waiting for a few minutes. Then when i put the car in d and started moving, the brakes didn't work as expected. I started idling at a speed of 15-30 km/h but in order to stop the car, full pressure needed to be applied on the brake paddle and even then the car would stop very slowly after covering quit a distance (for example, at 15 km/h it would stop after 20-30 meters approximately when brake paddle was fully pressed). This condition persisted for quite some time and the warning lights and the warning buzzer remained on all the time. I traveled this way from f-7 to g-11. Then the warning lights and the buzzer went off suddenly by itself and the brakes and everything else worked perfectly well. It is still working well, except when starting the car the next morning the same condition persisted for a few seconds and then it was fine.

I searched the web for the problem and found that a lot of people using prius have the same problem, some suggest replacing the stop light/brake light switch, others say that it is because of the 12v battery going old. Toyota capital in isb scanned it and did some tweaking but said that a 'pressure accumulator' may need replacement if the problem persists. This condition has not occured after getting it checked from toyota except that the abs, vsc, (!) and red parking lights stay on for 3-5 seconds alongwith the warning buzzer upon starting the car after parking it.

Any help would be really appreciated.

most likely it is the hybrid inverter pump its gets freid every 2 years it costs pkr 9,000 to replace it with labour

wassalaam

[turbo47]

Which is a suitable place where I can get it replaced?

[ahmedwasiq]

Your ABS unit need to be replaced.

Sent from my KIW-L21 using PW Forums mobile app

[umarmuslim]

which is a suitable place where i can get it replaced?

which city are you in ?

your abs unit need to be replaced.

Sent from my kiw-l21 using pw forums mobile app

mostly the pump causes this with a/c not working

but could also be the abs unit

wassalaam

[turbo47]

Islamabad or faisalabad or lahore. All these cities are accessible to me.

[umarmuslim]

Islamabad or faisalabad or lahore. All these cities are accessible to me.

Jawaid Akhtar aka Denso or Zaheer in Lahore

Wassalaam

[shadab_lodhi]

Get the car be air bled with the help of a diagnostic computer, delete the codes and then check for further problems.

[MuhammadMusa]

Ive gone through the same problem your ABS is worn out and needs to be replaced this is a very typical problem in this model

Sent from my SM-G925F using PW Forums mobile app

[mwm749]

Dear PW,

Dont waste time and money. As said by Musa the ABS unit needs to be replaced.
I had same problem with my car too, had to get the ABS replaced in end.
Also understand that its very risky to drive the car in this condition.

[anon68501833]

Hi,

If anyone having any issue or troubles in their prius from 2004 to 2012 can contact us. We have expertise in managing this car with team of experienced people having working background in UAE, Korea & Japan.

We are based in Karachi.

for details contact 03142042309

[aquahybrid]

I've Toyota Aqua 2012. Yesterday, I got my car washed from the service station with diesel spray in engine room. Just after having it washed, the car started having issues. Initially it didn't start at all. After trying 2 to 3 times, it finally started but AC was not working and 4 symbols were appearing on the dashboard screen. Engine check light (fuel pump symbol), hand brakes light, traction control and Hybrid warning light. Was so upset with this. Talked to my mechanic and he told me 'Don't Worry'. Just park the car in sun with opened bonnet for approx 2 hours. I did the same thing. After 2 hours, 2 out of 4 symbols had gone and AC started working but Hybrid warning light was still appearing Finally I got an idea...I took a hair dryer and tried to put some hot air around the plugs on hybrid synergy system in the bonnet. After doing it just for 5 mins, all the symbols had gone. So guys, if this happens to your cars, don't go to the mechanics immediately. They will charge heavy amount for removing the fault....

Regards,
Fakhar Imam (Pakistan)

[umarmuslim]

Brand New ABS Unit costing around 115K

[KMRahman]

I was facing the same problem but my car was not buzzing a warning sound.Plus brakes were working as normal although abs was not working. One mechanic cleared the code through scanner but it appeared on next day. He then suggested that abs has to be replaced. (I don't know whether accumulator has to be replaced or actuator)

Please suggest, what should I do?
Is used abs reliable

[anon68501833]

You initially in need to check your pressure sensors/abs sensors first. One or two of your pressure sensors might have any connection or less contact issue. If you can tell the code through scanner, I might help you in your problem specifically.

Regards,

Farrukh

Newtech autos Karachi.

[zeeshankhan820920121]

<img src="//live-pw-import.s3.amazonaws.com/original/4X/e/a/d/eadd8e10fd603748d98c47a448216ab632675f17.jpeg" width="375" height="500"
Toyota Prius ABS Anti-Lock Brake Pump Actuator Assembly

[zeeshankhan820920121]

Some your Car needs to replace ABS Anti-Lock Brake Pump Actuator Assembly

[mianhassan085]

Well.... what i think is that the main problem is the handbrake light comming on. Basically the car is fitted with a buzzer to remind the driver to release the hand brake. Ur hand brale light is on so the computer gets the message that brakes are applied and buzzer buzzes.
Get the brake light problem solved the rest will automatically disappear.

[abubakartahir94]

Your ABS needs changing
Exactly same thing happened with me
It all started from few seconds like you
Accumulator pressure low....
So i changed the abs assembly, now happy
Remember, do not install a use assembly!!!!!

[Newtechautos12]

If anyone want to replace their abs unit in prius 1500 cc from 2003-2008 can contact. we have complete abs units in fresh condition installation can be offer to Karachi customers