DESCRIPTION The skid control ECU (brake booster with master cylinder assembly) is connected to the combination meter assembly via CAN communication. 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 CAN communication system DTCs are output. Click here
(a) Select the Active Test on the Techstream. Click here
(b) Check the operating condition of the brake warning light / yellow (minor malfunction) when operating it using the Techstream.
(a) Perform the Active Test of the combination meter assembly (meter CPU) using the Techstream. Click here
(b) Check the combination meter assembly. OK: The brake warning light / yellow (minor malfunction) turns on or off in accordance with Techstream operation.
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Toyota Avalon Service & Repair Manual > Sfi System: ECM Power Source Circuit
DESCRIPTION When the power switch is turned to on (IG), the auxiliary battery voltage is applied to IGSW of the ECM. When the transistor in the MREL circuit operates, current flows from the auxiliary battery to ground through the drive circuit of the EFI-MAIN NO. 1 relay, thus operating the relay wh ...