Terminals Of Ecu

CHECK SKID CONTROL ECU WITH ACTUATOR

Fig 1: Identifying ECU Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage and resistance of the wire harness side connector.

SPECIFIED CONDITION

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
BM (S1-2) - GND (S1-1.32)	W-L - W-B	Motor relay test input	Ignition switch ON, pump motor running	11 to 14 V
FR+ (S1-3) - FR - (S1-17)	G-W - G-O	Front RH wheel speed ignition input	Ignition switch ON, slowly turn ignition front wheel	AC generation
FL+ (S1-18) - FL - (S1-4)	R - G	Front LH wheel speed ignition input	Ignition switch ON, slowly turn left front wheel	AC generation
RR+ (S1-5) - RR- (S1-19)	LG-B - LG-R	Rear RH wheel speed ignition input	Ignition switch ON, slowly turn ignition rear wheel	AC generation
RL+ (S1-20) - RL- (S1-6)	Y-B - Y-B	Rear LH wheel speed ignition input	Ignition switch ON, slowly turn left rear wheel	AC generation
TRC+ (S1-8) - TRC- (S1-22)	LG - P	ECM communication output	Ignition switch ON	Pulse generation
ENG+ (S1-9) - ENG - (S1-23)	G-W - L-B	ECM communication input	Ignition switch ON	Pulse generation
NEO (S1-10) - GND (S1-1, 32)	V - W-B	Engine rpm ignition input	Engine idling	Pulse generation
CANH (S1-11) - CANL (S1-25)	B-W	CAN communication line	Ignition switch ON	Pulse generation
D/G (S1-13) -GND (S1-1, 32)	W - W-B	Diagnostic communication line	Ignition switch ON	11 to 14 V
MRF (S1-14) - R+ (S1-45)	GR - R-W	Fail-safe motor relay output	Ignition switch ON	11 to 14 V
MR (S1-15) - R+ (S1-45)	P - R-W	Ignition switch ON, pump motor running	Motor relay output	11 to 14 V
+BS (S1-31) - GND (S1-1, 32)	B - W-B	Solenoid relay power supply	Always	11 to 14 V
STP (S1-27) -GND (S1-1.32)	G-W - W-B	Stop lamp input signal	Stop lamp switch ON (Brake pedal depressed)	8 to 14 V
STP (S1-27) -GND (S1-1.32)	G-W - W-B	Stop lamp input signal	Stop lamp switch OFF (Brake pedal released)	Below 1.5 V
PKB (S1-28) - GND (S1-1, 32)	Y-B - W-B	Parking brake switch input	Ignition switch ON, parking brake switch ON	Below 1.5 V
PKB (S1-28) - GND (S1-1, 32)	Y-B - W-B	Parking brake switch input	Ignition switch ON, parking brake switch OFF	11 to 14 V
WA (S1-29) -GND (S1-1, 32)	P - W-B	ABS warning lamp output	Ignition switch ON, ABS warning lamp ON	11 to 14 V
WA (S1-29) - GND (S1-1, 32)	P - W-B	ABS warning lamp output	Ignition switch ON, ABS warning lamp OFF	Below 2.0 V
Bz (S1-30) - GND (S1-1, 32)	R-W - W-B	Buzzer output	Ignition switch ON, VSC buzzer sounds	Below 1.0 V to 11 to 14 V
Bz (S1-30) - GND (S1-1, 32)	R-W - W-B	Buzzer output	Ignition switch ON, VSC buzzer does not sound	11 to 14 V
IND (S1-34) - GND (S1-1, 32)	B-R - W-B	SLIP input	Ignition switch ON	11 to 14 V
WT (S1-35) - GND (S1-1.32)	R-L - W-B	TRAC OFF input	Ignition switch ON	11 to 14 V
VSCW (S1-36) - GND (S1-1, 32)	BR-W - W-B	VSC warning lamp output	Ignition switch ON, VSC warning lamp ON	Below 2.0 V
VSCW (S1-36) - GND (S1-1, 32)	BR-W - W-B	VSC warning lamp output	Ignition switch ON, VSC warning lamp OFF	11 to 14 V
WFSE (S1-42) - GND (S1-1, 32)	R - W-B	WIFSE input	Ignition switch ON	11 to 14 V
CSW (S1-43) - GND (S1-1, 32)	W-L - W-B	TRAC OFF switch input	TRAC OFF switch OFF	11 to 14 V
BRL (S1-44) - GND (S1-1.32)	B-Y - W-B	Brake warning line output	Ignition switch ON, brake warning lamp ON	11 to 14 V
BRL (S1-44) - GND (S1-1.32)	B-Y - W-B	Brake warning line output	Ignition switch ON, brake warning lamp OFF	Below 2.0 V
R+ (S1-45) - GND (S1-1, 32)	R-W - W-B	Power supply for motor relay	Ignition switch ON, ABS warning lamp OFF	11 to 14 V
Ignition (S1-46) - GND (S1-1, 32)	B-L - W-B	IG1 power supply	Ignition switch ON	11 to 14 V

If the result is not as specified, there may be a malfunction in the ECU.