Terminals Of Ecu [04/2018 -]

WARNING: This page is about a different variant/trim than selected.

TERMINALS OF ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Component without harness connected
(Skid Control ECU (Brake Booster with Master Cylinder Assembly))

Terminal No. (Symbol)	Terminal Description
1 (MRO1)	Motor power supply output 1
2 (MRI1)	Motor power supply input 1
3 (FR+)	Front speed sensor RH (+) power supply output
4 (FR-)	Front speed sensor RH (-) signal input
5 (+BI2)	+BI2 power source input
6	- (Not used)
7 (RR+)	Rear speed sensor RH (+) power supply output
8 (RR-)	Rear speed sensor RH (-) signal input
9 (IG2)	IG2 power source input
10	- (Not used)
11 (SP1)	Speed sensor signal output
12 (STP)	Stop light switch assembly input
13 (SKG1)	Brake pedal stroke sensor assembly ground 1
14 (+BS)	ABS solenoid drive power output
15 (+BI1)	+BI1 power source input
16 (LBL)	Brake fluid level warning switch (Brake booster with master cylinder assembly) input
17 (SKS1)	Brake pedal stroke sensor assembly signal input 1
18 (CSW)	VSC OFF switch input
19 (SKS2)	Brake pedal stroke sensor assembly signal input 2
20 (CSW2)	Brake hold switch (Electric parking brake switch assembly) input
21 (VSK2)	Brake pedal stroke sensor assembly power supply output 2
22 (STPO)	Stop light control relay (Stop light switch assembly) output
23 (IG1)	IG1 power source input
24 (CTY)	Front door courtesy light switch assembly LH input
25 (VSK1)	Brake pedal stroke sensor assembly power supply output 1
26 (GND1)	Skid control ECU (Brake booster with master cylinder assembly) ground 1
27 (MRO2)	Motor power supply output 2
28 (MRI2)	Motor power supply input 2
29 (CA2L)	CAN communication line 2 (L)
30 (CA2H)	CAN communication line 2 (H)
31 (FL+)	Front speed sensor LH (+) power supply output
32 (FL-)	Front speed sensor LH (-) signal input
33 (SKG2)	Brake pedal stroke sensor assembly ground 2
34 (RL+)	Rear speed sensor LH (+) power supply output
35 (RL-)	Rear speed sensor LH (-) signal input
36	- (Not used)
37 (STP2)	Stop light control relay (Stop light switch assembly) input
38	- (Not used)
39 (GND2)	Skid control ECU (Brake booster with master cylinder assembly) ground 2
40 (+BM)	ABS motor drive power output
41 (BM)	ABS motor relay power supply input
42 (CA1L)	CAN communication line 1 (L)
43 (CA1H)	CAN communication line 1 (H)
44 (SFRR)	Front ABS reduction solenoid RH (-) output
45 (SFLR)	Front ABS reduction solenoid LH (-) output
46 (SRRR)	Rear ABS reduction solenoid RH (-) output
47 (SRLR)	Rear ABS reduction solenoid LH (-) output
48 (SFRH)	Front ABS holding solenoid RH (-) output
49 (SFLH)	Front ABS holding solenoid LH (-) output
50 (SRRH)	Rear ABS holding solenoid RH (-) output
51 (SRLH)	Rear ABS holding solenoid LH (-) output
52 (BS)	ABS solenoid relay power supply input

TERMINAL INSPECTION

Disconnect the connector and measure the voltage or resistance on the wire harness side.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Front view of wire harness connector
(to Skid Control ECU (Brake Booster with Master Cylinder Assembly))

HINT:

The voltage cannot be measured with the connector connected to the skid control ECU (brake booster with master cylinder assembly) as the connector is watertight.

STANDARD

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A35-2 (MRI1) - Body ground	B - Body ground	Motor power supply input 1	Always	11 to 14 V
A35-5 (+BI2) - Body ground	BE - Body ground	+BI2 power source input	Always	11 to 14 V
A35-9 (IG2) - Body ground	LA-R - Body ground	IG2 power source input	Power switch on (IG)	11 to 14 V
A35-12 (STP) - Body ground	SB - Body ground	Stop light switch assembly input	Stop light switch assembly on → off (Brake pedal depressed → released)	11 to 14 V → 1.5 V or less
A35-15 (+BI1) - Body ground	SB - Body ground	+BI1 power source input	Always	11 to 14 V
A35-16 (LBL) - Body ground	R - Body ground	Brake fluid level warning switch (Brake booster with master cylinder assembly) input	Brake fluid level warning switch off → on	1.84 to 2.16 kΩ → Below 1 Ω
A35-18 (CSW) - Body ground	P - Body ground	VSC OFF switch input	VSC OFF switch held on → off (Released)	Below 1 Ω → 10 kΩ or higher
A35-20 (CSW2) - Body ground	LG - Body ground	Brake hold switch (Electric parking brake switch assembly) input	Brake hold switch (Electric parking brake switch assembly) held on → off (Released)	Below 1 Ω → 10 kΩ or higher
A35-22 (STPO) - Body ground	L - Body ground	Stop light control relay (Stop light switch assembly) output	Always	11 to 14 V
A35-23 (IG1) - Body ground	LA-P - Body ground	IG1 power source input	Power switch on (IG)	11 to 14 V
A35-24 (CTY) - Body ground	V - Body ground	Front door courtesy light switch assembly LH input	Driver door closed → open	11 to 14 V → 1.5 V or less
A35-26 (GND1) - Body ground	LA - Body ground	Skid control ECU (Brake booster with master cylinder assembly) ground 1	Always	Below 1 Ω
A35-28 (MRI2) - Body ground	G - Body ground	Motor power supply input 2	Always	11 to 14 V
A35-37 (STP2) - Body ground	BE - Body ground	Stop light control relay (Stop light switch assembly) input	Stop light switch assembly on → off (Brake pedal depressed → released)	11 to 14 V → 1.5 V or less
A35-39 (GND2) - Body ground	W-B - Body ground	Skid control ECU (Brake booster with master cylinder assembly) ground 2	Always	Below 1 Ω
A35-41 (BM) - Body ground	L - Body ground	ABS motor relay power supply input	Always	11 to 14 V
A35-52 (BS) - Body ground	LG - Body ground	ABS solenoid relay power supply input	Always	11 to 14 V