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post #1 of 8 (permalink) Old 07-28-2006, 09:39 PM Thread Starter
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Default accessory mode

Does anyone know how to put the prius in the accessory mode after moving the car and the car has been running. so you can listen to radio or roll down the windows with turning the car off, but turning the engine off.
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post #2 of 8 (permalink) Old 07-29-2006, 03:26 AM
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Default Re: accessory mode

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Originally Posted by mr.whit
Does anyone know how to put the prius in the accessory mode after moving the car and the car has been running. so you can listen to radio or roll down the windows with turning the car off, but turning the engine off.
The only way to do it involves turning the car off first, then pressing 'Power' with your foot off the brake pedal. Pressing once goes into accessory, a second time goes into 'IG-ON' (the same as 'on' on a normal car, all functions are available, except the engine isn't running. In this case, the HV battery is still disconnected,) a third time goes back off. At any setting, holding down the brake pedal and hitting 'Power' turns the car all the way on ('READY' mode.)

But, you could just turn your A/C off, and sit in 'READY' mode indefinitely. As long as it's not so cold out that the car runs the engine just to keep parts warm, it should sit there for a long time before even a single 'bar' drops on the battery.

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post #3 of 8 (permalink) Old 07-29-2006, 01:02 PM
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Not with the Prius unfortunately. Apparently with other Toyotas with the push-button start, shifting to neutral then pressing the button goes to ACC but I can't do that with the Prius.

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post #4 of 8 (permalink) Old 07-30-2006, 10:56 AM
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turn the key back (counterclockwise) to the ACC position, assuming that you have a Classic Prius.

if you have a 2004-current Prius, then you will have to hit the power button a few times without the brake pedal depressed. According to my US 2004 Prius Owner's Manual, section 2-6, Operation of Instruments and Controls: "POWER" Switch, Transmission, and Parking Brake, page 130-134, with the car in the off position, press the POWER button once without pressing the brake pedal.




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post #5 of 8 (permalink) Old 07-30-2006, 11:23 PM
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Why not leave it in READY so that the engine can run when needed? (There's no way to go from READY to ACC without interrupting the radio.)

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post #6 of 8 (permalink) Old 07-31-2006, 08:23 AM
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I find that 'feature' also annoying for the same reason described by Mr.Wit.

And you may find that the HV battery will drop sooner than you think, even with the AC off. It is still providing 12V through the DC-DC converter, and there is still lots of stuff running, such as the inverter coolant pump, all the ECUs, dash lights, etc.
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post #7 of 8 (permalink) Old 03-22-2017, 04:54 PM
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I have had a couple of problems having a lunch break in my 2008 Prius car in accessory mode. I just listen to my radio for about an hour. Most times it works fine. But if it is a rainy day and I need my headlights, my lunch activity has caused me problems. I noticed that the headlights stay on in accessory mode and drain the small 12v battery completely. You would think that when the 12v battery gets so low, one cannot get to power mode, there would be a Prius warning. But Nothing... At the end of lunch, I just try to get to power mode and hear a bunch of clicking sounds (relays?) at the engine area. So I get the car jumped and after letting the battery charge a while, I get lots of weird error messages and something about the car needs to be in a level spot for the transmission. I have to press the start button numerous times to get into power mode and some errors have stayed for a couple of additional drives.
So is there any way to automatically get the Headlights off when in accessory mode? I am hoping there is a secret setting I can change. Thank You Greg
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post #8 of 8 (permalink) Old 03-23-2017, 09:10 AM
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Welcome to Prius Online! You posted a response in a message thread that's over 10 years old, so there's little chance of any of the original posters still being active on this forum. As far as your question about headlights in accessory, there is a way to do it with the 1st Gen Prius, and it may work with yours as well: start with the car off, engage the parking brake, then start the car in ACC or ON mode. The headlights should stay off until you disengage the parking brake.

Douglas (2002 Prius, 2006 Highlander Hybrid, Wisconsin)

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