Smart Entry & Start System Check Error

So I get this pop up on the dash 50% of the time. Truck still starts and unlocks fine. Any ideas?

nothing was installed around the time this started. I do have a remote start installed but that was done a month before this issue started

 

Have you tried changing the fob battery/ using the 2nd fob? The receivers (there are 2) also seem to very temperamental to voltage changes so have you added any electronic accessory’s recently?

 

Used both fobs and also did change the battery in the one I use all the time.

 

Have added a new radio (head unit). Probably the most near term addition. With a dash cam

 

what kinda headunit? If name brands then I’m sure it’s not the problem, if it’s one of the Android tablet type units then “personally” I’d unplug the power and see if that’s interfering with it.

 

Kenwood with their dash cam that works with it

 

them I’m kinda at a loss. When I was having issues with keyless entry I found an excellent online pdf (from Toyota) that explained how the system worked, where all the components where and all the different checks you can do. I can’t find it now, But it may be worth searching for it.

 

Will look for it. Thank you!

 

https://www.tacomaworld.com/threads/smart-entry-start-system-check.642050/

 

http://www.ttguide.net/system_description-1769.html

Situation: The smart key system is malfunctioning. An IG circuit malfunction, vehicle speed signal malfunction or malfunction that interferes with steering lock ECU (steering lock actuator or UPR bracket assembly) operation, has been detected.

In this situation, the following control is performed:

Reason for warning:
Malfunction detection

Warning Start Condition (One of conditions is met):
The steering lock ECU (steering lock actuator or UPR bracket assembly), driver of the certification ECU (smart key ECU assembly) or unlock detection switch is malfunctioning.
An IG relay output circuit malfunction occurs three times or more consecutively.
The vehicle speed is judged as abnormal or vehicle speed signal communication is malfunctioning.

Warning description:
Buzzer in combination meter assembly sounds once.
"Smart Entry & Start System Check" is displayed on multi-information display in combination meter assembly for 15 seconds.

Warning Stop Condition:
The system returns to normal.

 

Oh boy this is going to be a fun thing to tackle

 

Disconnect your car battery for 30 minutes and replace the fob battery during that time...this is the first path of least resistance. Only use the fob with the replaced battery until certain issue is gone.

 

Will try this out this weekend when i get home.

 

Any update on this? I am getting the same error in my 2020 the day I had a dashcam installed.

 

Update?