PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1A41

DTC Code	DTC Name
C1A41	Brake Request Value Mismatch between ENG / EHV and Driving Support ECU

DESCRIPTION

The skid control ECU assembly receives brake control request signals from the power management control ECU and driving support ECU.

When the request signals received from the power management control ECU and driving support ECU are not consistent, the skid control ECU assembly determines that a malfunction has occurred and sends a malfunction signal to the driving support ECU.

If the driving support ECU receives a malfunction signal, DTC C1A41 is stored.

DTC No.	DTC Detection Condition	Trouble Area
C1A41	While power switch is on (IG), brake request signal from power management control ECU and driving support ECU are inconsistent for approx. 1 second.	Electronically controlled brake system Hybrid control system Power management control ECU Skid control ECU assembly Driving support ECU

INSPECTION PROCEDURE

PROCEDURE

CHECK DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)
1. Check DTCs for electronically controlled brake system Click here.
  
  OK
  
  Electronically controlled brake system DTC is not output.
NG
GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM Click here

OK
REPLACE SKID CONTROL ECU ASSEMBLY
1. Replace the skid control ECU assembly Click here.
NEXT
CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)
1. Using the intelligent tester, enter the following menus: Body / Pre-Crash 2 / DTC.
2. Clear the DTCs Click here.
3. Check for DTC.
  
  OK
  
  DTC C1A41 is not output.
NG
REPLACE POWER MANAGEMENT CONTROL ECU Click here

OK

END
REPLACE POWER MANAGEMENT CONTROL ECU
1. Replace the power management control ECU Click here for LHD, Click here for RHD).
NEXT
CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)
1. Using the intelligent tester, enter the following menus: Body / Pre-Crash 2 / DTC.
2. Clear the DTCs Click here.
3. Check for DTC.
  
  OK
  
  DTC C1A41 is not output.
NG
REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

OK

END