Terminal of ECU

Fig 1: Identifying Skid Control ECU Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

ECU TERMINAL REFERENCE CHART

Symbols (Terminal No.)	Terminal Description
GND 2 (1)	Motor ground
BM (2)	Motor relay input
FR+ (3)	Front RH wheel speed signal power supply output
FL- (4)	Front LH wheel speed signal input
RR+ (5)	Rear RH wheel speed signal power supply output
RL- (6)	Rear LH wheel speed signal input
FSW+ (7)	Brake pedal load sensing switch input
CANH (11)	CAN communication line H
SP1 (12)	Speed signal output for combination meter
D/G (13)	Diagnosis tester communication line
MRF (14)	Fail-safe motor relay output
MR (15)	Motor relay output
FR- (17)	Front RH wheel speed signal input
FL+ (18)	Front LH wheel speed signal power supply output
RR- (19)	Rear RH wheel speed signal input
RL+ (20)	Rear LH wheel speed signal power supply output
TS (24)	Test mode input
CANL (25)	CAN communication line L
STP (27)	Stop light switch input
PKB (28)	Parking brake switch input
BZ (30)	Buzzer output
+BS (31)	Solenoid relay power supply
GND1 (32)	Skid control ECU ground
FRO (37)	Front RH wheel speed signal output
FLO (38)	Front LH wheel speed signal output
RRO (39)	Rear RH wheel speed signal output
RLO (40)	Rear LH wheel speed signal output
WFSE (42)	WFSE input
CSW (43)	VSC OFF switch input
R+ (45)	Power supply for motor relay
IG1 (46)	IG1 power supply

Terminal Inspection

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

Fig 2: Identifying Skid Control ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

Voltage cannot be measured with the connector connected to the skid control ECU as the connector is watertight.

ECU TERMINAL REFERENCE CHART

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
FSW+ (7) - Body ground	G-O - Body ground	Brake pedal load sensing switch input	Stop light switch ON (Brake pedal depressed)	1 kΩ
FSW+ (7) - Body ground	G-O - Body ground	Brake pedal load sensing switch input	Stop light switch OFF (Brake pedal released)	213Ω
STP (27) - Body ground	R-W - Body ground	Stop light switch input	Stop light switch ON (Brake pedal depressed)	8 to 14 V
STP (27) - Body ground	R-W - Body ground	Stop light switch input	Stop light switch OFF (Brake pedal released)	Below 1.5 V
PKB (28) - Body ground	Y-R - Body ground	Parking brake switch input	Engine switch on (IG), parking brake switch ON	Below 1 Ω
PKB (28) - Body ground	Y-R - Body ground	Parking brake switch input	Engine switch on (IG), parking brake switch OFF	10 kΩ or higher
BZ (30) - Body ground	Y-B - Body ground	Buzzer output	Engine switch on (IG), when not buzzer sounding	6 to 10 V
+BS (31) - Body ground	R - Body ground	Solenoid relay power supply	Always	10 to 14 V
CSW (43) - Body ground	R-L - Body ground	VSC OFF switch input	VSC OFF switch OFF	10 kΩ or higher
CSW (43) - Body ground	R-L - Body ground	VSC OFF switch input	VSC OFF switch ON	Below 1 Ω
IG1 (46) - Body ground	B-W - Body ground	IG1 power supply	Engine switch on (IG)	10 to 14 V

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Terminals Of Ecu