Terminals Of Ecu [09/2022 - 11/2022]

WARNING: This page is about a different car, the 2023 Toyota GR Corolla and 2023 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

TERMINALS OF ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 [09/2022 - 11/2022]

Terminal No. (Symbol)	Terminal Description
1 (+BM)	ABS motor relay power supply
2 (SP1)	Speed signal output
3 (STPO)	Stop light control relay (stop light switch assembly) output
4 (FR-)	Front wheel speed RH (-) signal input
5	-
6	-
7	-
8 (FL-)	Front wheel speed LH (-) signal input
9 (STP)	Stop light switch assembly signal input
10	-
11	-
12	-
13 (GND2)	Pump motor ground
14 (CANL)	CAN communication line L
15	-
16 (FR+)	Front wheel speed RH (+) power supply output
17 (RR+)	Rear wheel speed RH (+) power supply output
18 (RL-)	Rear wheel speed LH (-) signal input
19 (FL+)	Front wheel speed LH (+) power supply output
20	-
21	-
22 (CSW)	VSC OFF switch (combination switch assembly) input
23	-
24 (STP2)	Stop light signal input
25 (+BS)	ABS solenoid relay power supply
26 (CANH)	CAN communication line H
27	-
28 (IG1)	IG1 power source input
29 (RR-)	Rear wheel speed RH (-) signal input
30	-
31 (RL+)	Rear wheel speed LH (+) power supply output
32	-
33	-
34	-
35	-
36	-
37	-
38 (GND1)	Skid control ECU (brake actuator assembly) ground

TERMINAL INSPECTION

Disconnect the A100 skid control ECU (brake actuator assembly) connector and measure the voltage and resistance on the wire harness side.

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
A100-1 (+BM) - Body ground	L - Body ground	ABS motor relay power supply	Always	11 to 14 V
A100-3 (STPO) - Body ground	BE - Body ground	Stop light control relay (stop light switch assembly) output	Always	11 to 14 V
A100-9 (STP) - Body ground	B - 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
A100-13 (GND2) - Body ground	W-B - Body ground	Pump motor ground	Always	Below 1 Ω
A100-22 (CSW) - Body ground	BR - Body ground	VSC OFF switch (combination switch assembly) input	VSC OFF switch (combination switch assembly) on → off (Pressed → not pressed)	Below 50 Ω → 10 kΩ or higher
A100-24 (STP2) - Body ground	L - 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
A100-25 (+BS) - Body ground	W - Body ground	ABS solenoid relay power supply	Always	11 to 14 V
A100-28 (IG1) - Body ground	SB - Body ground	IG1 power source input	Ignition switch ON	11 to 14 V
A100-38 (GND1) - Body ground	W-B - Body ground	Skid control ECU (brake actuator assembly) ground	Always	Below 1 Ω