DESCRIPTION The skid control ECU (brake booster with master cylinder assembly) is connected to the combination meter assembly via CAN communication. If any of the following is detected, the brake warning light / red (malfunction) remains on:
WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
PROCEDURE
(a) Check that all of the following conditions required for the brake warning light / red (malfunction) to turn off are met:
(a) Check if ABS, VSC and/or electronically controlled brake system DTCs are output. Click here Chassis > ABS/VSC/TRAC > Trouble Codes
(a) Check if CAN communication system DTCs are output. Click here
(a) Check if the skid control ECU (brake booster with master cylinder assembly) connector is securely connected. OK: The connector is securely connected.
(a) Check the auxiliary battery voltage. Standard Voltage:
(b) Make sure that there is no looseness at the locking part and the connecting part of the connector. OK: The connector is securely connected. (c) Disconnect the A35 skid control ECU (brake booster with master cylinder assembly) connector. (d) Check both the connector case and the terminals for deformation and corrosion. OK: No deformation or corrosion. (e) Turn the power switch on (IG). (f) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Reconnect the A35 skid control ECU (brake booster with master cylinder assembly) connector. (b) Select the Data List on the Techstream. Click here Chassis > ABS/VSC/TRAC > Data List
(c) Check the Techstream display condition of the brake warning light / red (malfunction).
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Toyota Avalon Service & Repair Manual > Audio And Visual System(for Hv Model): Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. HINT: Using the Techstream to read the Data List allows the values or states of ...