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Home >> Toyota >> 2016 >> Highlander Hybrid Limited >> Repair and Diagnosis >> Restraints >> Seat Belts >> Pre-Collision System - Diagnostic Codes & Circuit Tests - (Hybrid) >> Pre-Collision System >> DTC C1A41: Brake Request Value Mismatch between ENG / EHV and Driving Support ECU [02/2014 - 11/2016] >> Description

DTC C1A41: Brake Request Value Mismatch between ENG / EHV and Driving Support ECU [02/2014 - 11/2016]: Description

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

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

If the driving support ECU assembly receives a malfunction signal, DTC C1A41 is output. Although the skid control ECU assembly sends a malfunction signal to the driving support ECU assembly, the electronically controlled brake system does not output a relevant malfunction detection DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A41 Brake Request Value Mismatch between ENG / EHV and Driving Support ECU While the power switch is on (IG), the skid control ECU assembly detects a significant difference in the brake request signal from the power management control ECU and driving support ECU assembly for 3 seconds or more.
  • Electronically controlled brake system
  • Hybrid control system
  • Power management control ECU
  • Skid control ECU
  • Driving support ECU assembly