2013 Lexus LS 460L AWDFACTORY OEM SERVICE PROCEDURE

DTC C1A50: Brake System: Procedure

  1. CHECK FOR DTC (ELECTRONICALLY CONTROLLED BRAKE SYSTEM) 
    1. Check for DTCs. Refer to DTC CHECK / CLEAR [09/2012 - ] .

      OK

      Electronically controlled brake system DTCs are not output.

    NG → See step   4 

    OK: Go to next step 

  2. CHECK FOR DTC (SFI SYSTEM) 
    1. Clear the DTCs. Refer to DTC CHECK / CLEAR [09/2012 - ] .
    2. Check for DTCs. Refer to DTC CHECK / CLEAR [09/2012 - ] .

      OK

      SFI system DTCs are not output.

    NG → See step   7 

    OK: Go to next step 

  3. CHECK FOR DTC 
    1. Clear the DTC. Refer to DTC CHECK / CLEAR [09/2012 - ] .
    2. Check for DTC. Refer to DTC CHECK / CLEAR [09/2012 - ] .

      OK

      DTC C1A50 is not output.

    NG → See step   6 

    OK → See step   5 

  4. GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2012 - ] 
  5. USE SIMULATION METHOD TO CHECK. Refer to  PROBLEM SYMPTOMS TABLE [09/2012 - ] 
  6. REPLACE DRIVING SUPPORT ECU. Refer to  REMOVAL [09/2012 - ] 
  7. GO TO SFI SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2012 - ] 
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.