Terminals Of Ecu [08/2021 - ]
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY)
*a Front view of wire harness connector (to Parking Brake ECU (Brake Actuator Assembly)) - - - Disconnect the A48 parking brake ECU (brake actuator assembly) connector.
- Measure the voltage and resistance according to the value (s) in the table below.
Terminal No. (Symbol) Terminal Description Condition Specified Condition A48-9 (BEPB) - Body ground Parking brake Ignition supply Power switch off 11 to 14 V A48-26 (IG) - Body ground IG Ignition supply Power switch on (IG) 11 to 14 V A48-2 (EGND) - Body ground Ground Always Below 1 Ω A48-14 (SWI1) - Body ground Electric parking brake switch assembly - - A48-24 (SWI2) - Body ground Electric parking brake switch assembly - - A48-20 (SWO1) - Body ground Electric parking brake switch assembly - - A48-22 (SWO2) - Body ground Electric parking brake switch assembly - - A48-4 (MRR+) - Body ground Parking brake motor RH (parking brake actuator assembly RH) (+) - - A48-3 (MRR-) - Body ground Parking brake motor RH (parking brake actuator assembly RH) (-) - - A48-7 (MRL+) - Body ground Parking brake motor LH (parking brake actuator assembly LH) (+) - - A48-8 (MRL-) - Body ground Parking brake motor LH (parking brake actuator assembly LH) (-) - - A48-27 (SPD) - Body ground Vehicle speed direct input - - A48-12 (CANH) - Body ground CAN communication line H - - A48-11 (CANL) - Body ground CAN communication line L - -