'07 Backup Sensor System Failure - Toyota FJ Cruiser Forum
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post #1 of 9 (permalink) Old 01-08-2018, 04:02 PM Thread Starter
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'07 Backup Sensor System Failure

The backup sensor system, when activated (dash button pushed in) and in Reverse the backup system takes a pause then beepbeep.......beepbeep......beepbeep..... (continues with two beeps, pause). There is no obstruction behind the vehicle.

I, well my wife but she prefers that I say I, backed into a lamp stanchion in the Post Office parking lot and shattered the drivers side rear silver bumper cover with just a minor scraping onto the left side of the more solid rear center section. I've replaced the rear bumper cover with a new ebay unit and checked the wiring to both sensors. I did change the left side sensor just in case to no effect.

Thoughts?

ETA: I've also searched and browsed the online factory manual with no luck in finding anything on the backup sensor system other than how to remove/replace the sensors.

Last edited by Wolfeie; 01-09-2018 at 08:50 AM.
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post #2 of 9 (permalink) Old 03-07-2018, 09:07 AM
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Re: '07 Backup Sensor System Failure

Bump? Mine haven’t worked since 2012.

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post #3 of 9 (permalink) Old 03-07-2018, 10:45 AM
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Re: '07 Backup Sensor System Failure

When vehicle is shifted into reverse, with parking assist turned on, it should beep for 1 sec, then nothing until it detects an obstacle.

A repeating 2 beeps and a pause indicates a problem in the parking system.

To test the sensors, unplug the sensor and measure resistance between the two terminals, should be 8-12k ohms.

There is more info in the fsm on how to check wiring harness, parking ecu, etc, using a multi-meter

BTW, supposedly you can adjust the volume of the beep, at the parking ecu behind the glove box, but I never attempted it
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post #4 of 9 (permalink) Old 03-07-2018, 11:33 AM
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Re: '07 Backup Sensor System Failure

Mine broke years ago and they are just to expencive to bother fixing. You will just have to do it the old school way and look in your mirrors before backing up along with looking both ways......this method still works great.

Steve.... 07 FJ with almost enough mods.... August 2017 Member of the month
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post #5 of 9 (permalink) Old 03-08-2018, 10:01 AM
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Re: '07 Backup Sensor System Failure

Quote:
epm131 previously said: View Post
When vehicle is shifted into reverse, with parking assist turned on, it should beep for 1 sec, then nothing until it detects an obstacle.

A repeating 2 beeps and a pause indicates a problem in the parking system.

To test the sensors, unplug the sensor and measure resistance between the two terminals, should be 8-12k ohms.

There is more info in the fsm on how to check wiring harness, parking ecu, etc, using a multi-meter

BTW, supposedly you can adjust the volume of the beep, at the parking ecu behind the glove box, but I never attempted it

Badass. Thanks man.

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post #6 of 9 (permalink) Old 03-14-2018, 01:43 AM
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Re: '07 Backup Sensor System Failure

I replaced my sensors after running into a pedestrian while backing up in the dark. Could have cost me license suspension for 2 yrs and I sort of got a helluva motivation to fix them after this.

I used chinese replicas which came out real cheap. I did disassemble the sensor units and pack them with Liqui Moly batterie-pol-fett grease, so they won't suck moisture in. Strange as it may be, this works. Their behaviour is a bit different from oem, but I got used to it.

We all believe that we drive a little better than average, and I do look in my mirrors, but that one time a combination of dusk, dark clothing and a childseat, blocking part of the rear window, got me in real trouble.

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Last edited by Xsen; 03-14-2018 at 01:45 AM.
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post #7 of 9 (permalink) Old 04-10-2019, 03:59 PM
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Quote:
Sanderhawk previously said: View Post
Mine broke years ago and they are just to expencive to bother fixing. You will just have to do it the old school way and look in your mirrors before backing up along with looking both ways......this method still works great. <img src="https://www.fjcruiserforums.com/forums/images/smilies/smile.gif" border="0" alt="" title="Smile" class="inlineimg" />
I got a replacement for $13 on ebay 3 years ago.

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post #8 of 9 (permalink) Old 04-10-2019, 06:50 PM
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Re: '07 Backup Sensor System Failure

Quote:
.FJ previously said: View Post
I got a replacement for $13 on ebay 3 years ago.
Yeah I bought a set off ebay also. When I got them they didn`t work. I had the seller send me another set and they sent me the wrong sensors so after all that I just decided I didn`t need them

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post #9 of 9 (permalink) Old 04-10-2019, 08:57 PM
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Re: '07 Backup Sensor System Failure

I recommend this style if you can find it. Much better than the OEM backup system. Should be fine with an '07.

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