DTC C1A41: Brake Request Value Mismatch between ENG / EHV and Driving Support ECU: Procedure
WARNING: This page is about a different variant/trim than selected.
- READ OUTPUT DTC (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.
- Read the DTCs.
Result
Result Proceed to DTC is not output A DTC is output B
B → See step 8
A: Go to next step
- READ OUTPUT DTC (HYBRID CONTROL SYSTEM)
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
- Read the DTCs.
Result
Result Proceed to DTC is not output A DTC is output B
B → See step 9
A: Go to next step
- CHECK WHETHER DTC OUTPUT RECURS (DTC C1A41)
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Clear the DTCs. Refer to DTC CHECK / CLEAR .
- Perform the following to make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the malfunction cannot be detected.
- Drive the vehicle at a speed for which cruise control operation is possible.
- Turn the cruise control main switch on.
- Push the -SET switch to activate the cruise control.
- Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.
- Read the DTCs.
Result
Result Proceed to DTC is not output A DTC C1A41 is output B
B → See step 4
A → See step 11
- REPLACE DRIVING SUPPORT ECU
- Replace the driving support ECU. Refer to REMOVAL .
NEXT: Go to next step
- CHECK WHETHER DTC OUTPUT RECURS (DTC C1A41)
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Clear the DTCs. Refer to DTC CHECK / CLEAR .
- Perform the following to make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the malfunction cannot be detected.
- Drive the vehicle at a speed for which cruise control operation is possible.
- Turn the cruise control main switch on.
- Push the -SET switch to activate the cruise control.
- Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.
- Read the DTCs.
Result
Result Proceed to DTC is not output A DTC C1A41 is output B
B → See step 6
A → END
- REPLACE BRAKE BOOSTER WITH MASTER CYLINDER
- Replace the brake booster with master cylinder (skid control ECU). Refer to REMOVAL .
NEXT: Go to next step
- CHECK WHETHER DTC OUTPUT RECURS (DTC C1A41)
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Clear the DTCs. Refer to DTC CHECK / CLEAR .
- Perform the following to make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the malfunction cannot be detected.
- Drive the vehicle at a speed for which cruise control operation is possible.
- Turn the cruise control main switch on.
- Push the -SET switch to activate the cruise control.
- Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.
- Read the DTCs.
Result
Result Proceed to DTC is not output A DTC C1A41 is output B
B → See step 10
A → END
- GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to DIAGNOSTIC TROUBLE CODE CHART
- GO TO HYBRID CONTROL SYSTEM. Refer to DIAGNOSTIC TROUBLE CODE CHART
- REPLACE POWER MANAGEMENT CONTROL ECU. Refer to REMOVAL
- USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING