Terminals Of Ecu [06/2018 - ]
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- TERMINALS OF ECU
*a Component without harness connected
(Skid Control ECU (Brake Actuator Assembly))- - HINT:
- As a waterproof connector is used for the brake actuator assembly, voltage and waveform inspections cannot be performed with the connector connected.
- Use the Techstream to read data and perform Active Tests when inspecting the operation and communication status of the brake actuator assembly.
Refer to DATA LIST / ACTIVE TEST [06/2018 - ]
Terminal No. (Symbol) Terminal Description 1 (+BM) ABS motor relay power supply 2 - 3 - 4 - 5 (CANH) CAN communication line H 6 - 7 (FL-) Front wheel speed LH (-) signal input 8 - 9 - 10 - 11 - 12 - 13 - 14 (GND2) Pump motor ground 15 - 16 - 17 - 18 - 19 (CANL) CAN communication line L 20 - 21 (FR+) Front wheel speed RH (+) power supply output 22 (RR+) Rear wheel speed RH (+) power supply output 23 (RL-) Rear wheel speed LH (-) signal input 24 (FL+) Front wheel speed LH (+) power supply output 25 - 26 (FR-) Front wheel speed RH (-) signal input 27 - 28 - 29 - 30 (+BS) ABS solenoid relay power supply 31 - 32 - 33 (STPO) Stop light control relay (stop light switch assembly) output 34 (SP1) Speed signal output for speedometer 35 - 36 (IG1) IG1 power source input 37 (RR-) Rear wheel speed RH (-) signal input 38 (CSW) VSC OFF switch input 39 (RL+) Rear wheel speed LH (+) power supply output 40 - 41 (STP) Stop light switch assembly signal input 42 (EXI3) Brake hold switch (No. 3 combination switch assembly) input 43 (STP2) Stop light signal input 44 - 45 - 46 (GND1) Skid control ECU (brake actuator assembly) ground - TERMINAL INSPECTION
- Disconnect the A40 skid control ECU (brake actuator assembly) connector and measure the voltage and resistance on the wire harness side.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
*a Front view of wire harness connector
(to Skid Control ECU (Brake Actuator Assembly))- - - Measure the voltage or resistance according to the value(s) in the table below.STANDARD
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A40-1 (+BM) - Body ground B - Body ground ABS motor relay power supply Always 11 to 14 V A40-14 (GND2) - Body ground W-B - Body ground Pump motor ground Always Below 1 Ω A40-30 (+BS) - Body ground G - Body ground ABS solenoid relay power supply Always 11 to 14 V A40-33 (STPO) - Body ground L - Body ground Stop light control relay (stop light switch assembly) output Always 11 to 14 V A40-36 (IG1) - Body ground B - Body ground IG1 power source input Engine switch on (IG) 11 to 14 V A40-38 (CSW) - Body ground P - Body ground VSC OFF switch input VSC OFF switch on → off (Pressed → not pressed) Below 1 Ω → 10 kΩ or higher A40-41 (STP) - Body ground GR - Body ground Stop light switch assembly signal input Stop light switch assembly on → off (Brake pedal depressed → released) 11 to 14 V → 1.5 V or less A40-42 (EXI3) - Body ground G - Body ground Brake hold switch (No. 3 combination switch assembly) input Brake hold switch (No. 3 combination switch assembly) on → off (Pressed → not pressed) Below 1 Ω → 10 kΩ or higher A40-43 (STP2) - Body ground R - Body ground Stop light signal input Stop light switch assembly on → off (Brake pedal depressed → released) 11 to 14 V → 1.5 V or less A40-46 (GND1) - Body ground W-B - Body ground Skid control ECU (brake actuator assembly) ground Always Below 1 Ω
- Disconnect the A40 skid control ECU (brake actuator assembly) connector and measure the voltage and resistance on the wire harness side.