4th Gen 4Runner - VSC, TRAC OFF, ABS, and Parking Brake Lights All On (Loud Beep) - Need Help

Hello everyone,

Looking for help diagnosing a serious issue with my 4th gen Toyota 4Runner. When I start the engine, the VSC, TRAC OFF, ABS, and parking brake lights all come on—and there’s no brake function at all. On top of that, there’s a loud constant beeping noise when the engine is running.

There’s no check engine light, but obviously this is a critical safety issue .

Here’s what I’ve noticed:

• The brake pedal goes to the floor, no pressure
  
  
• Parking brake is fully released
  
  
• Brake fluid level looks normal
  
  
• No recent work or modifications
  
  
• The 4Runner was driving fine until this happened

• Questions:

• What’s the best way to diagnose this ? Are there are any simple steps to troubleshoot or fix this?
  
  
• Could this be the brake actuator or master cylinder?
  
  
• Is there a way to pull ABS or VSC codes without the dealer? Will a standard obd2 scanner work for this?
  
  
• Would a bad battery or any other system failure cause complete brake failure like this?
  
• Any guidance on what to check or how to safely troubleshoot this would be really appreciated. I’m not a DIY person and would need help.

Thanks in advance!

 

Welcome

 

Welcome from Arizona!
Are your battery connections good, no bad fuses?

 

yes, the battery is good and no bad fuses. Thank you!!

 

Welcome to the forum!