DESCRIPTION The skid control ECU (brake booster with master cylinder assembly) communicates with the hybrid vehicle control ECU and controls braking force according to the motor's regenerative force. The skid control ECU (brake booster with master cylinder assembly) sends enhanced-VSC signals to the hybrid vehicle control ECU and receives operating signals from the hybrid vehicle control ECU. The skid control ECU (brake booster with master cylinder assembly) uses CAN communication for communicating with the hybrid vehicle control ECU. If a communication malfunction is detected, the skid control ECU (brake booster with master cylinder assembly) prohibits enhanced-VSC operation, brake hold operation and part of the electronically controlled brake system control as a fail-safe function. If the signals from the hybrid vehicle control ECU return to normal, the warning light will go off and the DTCs C1259 and C1310 will be cleared. HINT: These DTCs will be output from the skid control ECU (brake booster with master cylinder assembly) when the hybrid vehicle control ECU sends a malfunction signal to the skid control ECU (brake booster with master cylinder assembly).
CAUTION / NOTICE / HINT NOTICE: After replacing the skid control ECU (brake booster with master cylinder assembly), perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory". Click here PROCEDURE
(a) Check if a hybrid control system DTCs are output. Click here Powertrain > Hybrid Control > Trouble Codes
(a) Check if a motor generator control system DTCs are output. Click here Powertrain > Motor Generator > Trouble Codes
(a) Check if a SFI system DTCs are output. Click here Powertrain > Engine > Trouble Codes
(a) Clear the DTCs. Click here Chassis > ABS/VSC/TRAC > Clear DTCs(b) Turn the power switch off. (c) Turn the power switch on (IG). (d) Check if the same DTC is output. Click here Chassis > ABS/VSC/TRAC > Trouble Codes
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Safety Connect System(for Hv Model): How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the safety connect system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK HINT: In troubleshooting, confirm that the problem symptoms have been accurat ...