Deceleration Sensor Malfunction (1 Viewer)

[SATJS]

Hey everybody. Been lurking on the site for a while but first time posting. I find that 90% of the time I can find all the info I need and more with good old search button. In fact, thanks to the help you've all given me with info already here, I installed a Slee kit with Slee Heavy rear coils, torsion bars, and SPC upper arms this weekend on my new to me 2001 Land Cruiser. Went with the heavies because the truck already had the Slee double swing out rear and Blueberry front bumpers. Anyway, the reason for this post is I have an issue that I've been unable to find any info on. The truck is not a daily driver. I picked it up about 6 weeks ago and it had been sitting in my garage for about the last 3 without moving. When I parked it everything was good. But when I started it after sitting, the ABS, VSC Trac, VSC Off, and Brake lights all stayed on. I drove it around the block, shut it off, and restarted it and everything was fine. I pulled the code by shorting the E1 and TC Terminals (another trick learned here) and got a code 43 - deceleration sensor malfunction. I cleared the code and everything is good as long as I don't go very long without driving it. If it sits a few hours, no lights. If it sits a day or 2, I get the code again. I don't understand why it sets the code after sitting and not moving for a while, shouldn't the deceleration sensor malfunction when it's decelerating? Or at least moving? Also, is this something that can be easily changed on my own? I fairly mechanical and am comfortable with most repairs, just a little Leary with electrical / computer stuff. I know it will require a zero point calibration if it's replaced. Is it possible that it just needs re calibrated? The truck's going to Slee Off-road later this week for an alignment, which includes a zero point calibration so it would be great if that was the issue.
Thanks in advance for any help.

 

[spressomon]

What's the battery voltage after it sits long enough to be problematic?

 

[Sandroad]

A long shot, but have you checked for rodent damage to wiring? That can cause weird electrical issues, including battery discharge and low voltage like spressoman suggested. The sitting for 3 weeks thing may be a clue, if rodents got into something.

 

[SATJS]

I don't know the voltage when it becomes problematic, I checked the voltage just now and it's reading 12.4, but not having the issue. You may be on to something though, I've spent time the last few weeks building a drawer system, so it's spent a lot of time with doors open / lights on. Very possible the battery got run down. I've only taken it on very short drives when the code was thrown thinking it had to be driven a ways to reset, so it wouldn't have fully charged. I've got it on the charger right now to make sure it has a full charge and will continue to monitor it. What should the voltage read after sitting for a day or 2?

 

[hankinid]

A long shot, but have you checked for rodent damage to wiring? That can cause weird electrical issues, including battery discharge and low voltage like spressoman suggested. The sitting for 3 weeks thing may be a clue, if rodents got into something.

I ran into something similar...I had chafing in the wire harness between the body and lower tailgate. It presented as intermittent loss of brake and tail lights, and the same dash lights as you saw. Looked like a slot machine after a jackpot. No blown fuses. Once I exposed the area and removed the factory electrical tape, the cause was obvious; getting there was the biatch. After re-insulating everything with heat shrinkable tubing, problems solved.

The truck did throw about 3-4 codes, none having to do with wiring.

I get about 12-12.5 volts after a charge and a few days sitting. Engine running, 14 volts.

I'd start with wiring around the decel sensor, as you had work done around the front end with the bumper installed.

Good luck, you may need it.

Steve

 

[AstRomroMan]

Can someone tell me where the deceleration sensor is on my 2004 LC? Thanks

 

[RioAguaNegra]

Can someone tell me where the deceleration sensor is on my 2004 LC? Thanks

yep, me too. I got a 43 code