Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Terminals Of Ecu

TERMINALS OF ECU

CHECK SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

*a

Component without harness connected

(Skid Control ECU (Brake Actuator Assembly))

-

-

(a) Disconnect the A41 skid control ECU (brake actuator assembly) connectors.

(b) Measure the voltage and resistance according to the value (s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A41-14 (+BS) - Body ground

L - Body ground

Parking brake motor (parking brake actuator assembly) power supply

Always

11 to 14 V

A41-45 (IG1) - Body ground

V - Body ground

IG power supply

Engine switch on (IG)

11 to 14 V

A41-1 (GND1) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

A41-30 (GND2) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

A41-13 (MRR+) - Body ground

Y - Body ground

Parking brake motor RH (parking brake actuator assembly RH) (+)

-

-

A41-12 (MRR-) - Body ground

R - Body ground

Parking brake motor RH (parking brake actuator assembly RH) (-)

-

-

A41-3 (MRL+) - Body ground

B - Body ground

Parking brake motor LH (parking brake actuator assembly LH) (+)

-

-

A41-2 (MRL-) - Body ground

L - Body ground

Parking brake motor LH (parking brake actuator assembly LH) (-)

-

-

A41-38 (POL) - Body ground

L - Body ground

Electric parking brake switch indicator light

-

-

A41-36 (SWI1) - Body ground

G - Body ground

Electric parking brake switch (electric parking brake switch assembly)

-

-

A41-31 (SWO1) - Body ground

LG - Body ground

Electric parking brake switch (electric parking brake switch assembly)

-

-

A41-41 (SWI2) - Body ground

W - Body ground

Electric parking brake switch (electric parking brake switch assembly)

-

-

A41-39 (SWO2) - Body ground

R - Body ground

Electric parking brake switch (electric parking brake switch assembly)

-

-

A41-27 (CANH) - Body ground

B - Body ground

CAN communication line H

-

-

A41-43 (CANL) - Body ground

W - Body ground

CAN communication line L

-

-

    Test Mode Procedure
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    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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