Terminals Of Ecu

TERMINALS OF ECU

Fig 1: Identifying Skid Control ECU Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

SKID CONTROL ECU TERMINALS DESCRIPTION

Symbols (Terminal No.)	Terminal Description
+BS (S1-1)	Solenoid valve power supply
GND2 (S1-2)	Actuator pump motor ground
PN (S1-6)	NEUTRAL switch signal circuit
FL- (S1-8)	Front LH wheel speed signal input (-)
FL+ (S1-9)	Front LH wheel speed signal input (+)
STP (S1-10)	Stop light switch input
RL+ (S1-11)	Rear LH wheel speed signal input (+)
RL- (S1-12)	Rear LH wheel speed signal input (-)
WA (S1-13)	ABS warning light output
D/G (S1-14)	Diagnosis tester communication line
TS (S1-15)	Sensor diagnosis check input
TC (S1-16)	Diagnosis tester communication line
PKB (S1-18)	Parking brake switch input
+BM (S1-23)	Motor relay power supply
GND1 (S1-24)	Skid control ECU ground
IG1 (S1-25)	ECU power supply
SP1 (S1-26)	Speed signal output for meter
FR- (S1-30)	Front RH wheel speed signal input (-)
FR+ (S1-31)	Front RH wheel speed signal input (+)
BRL (S1-32)	BRAKE warning light output
RR+ (S1-33)	Rear RH wheel speed signal input (+)
RR- (S1-34)	Rear RH wheel speed signal input (-)

TERMINALS INSPECTION

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

HINT:

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

Fig 2: Identifying Skid Control ECU Terminals

VOLTAGE SPECIFICATION

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
+BS (S1-1) - GND1, 2 (S1-24, 2)	B - W-B	Solenoid valve power supply	Always	11 to 14 V
STP (S1-10) - GND1, 2 (S1-24, 2)	L - W-B	Stop light switch input	Stop light switch ON	11 to 14 V
WA (S1-13) - GND1, 2 (S1-24, 2)	SB - W-B	ABS warning light output	Ignition switch ON, ABS warning light ON	11 to 14 V
PKB (S1-18) - GND1, 2 (S1-24, 2)	LG - W-B	Parking brake switch input	Ignition switch ON, parking brake switch ON	Below 2.0 V
PKB (S1-18) - GND1, 2 (S1-24, 2)	LG - W-B	Parking brake switch input	Ignition switch ON, parking brake switch OFF	11 to 14 V
+BM (S1-23)-GND1, 2 (S1-24, 2)	W - W-B	Motor relay power supply	Always	11 to 14 V
BRL (S1-32) - GND1, 2 (S1-24, 2)	V - W-B	BRAKE warning light output	Ignition switch ON, BRAKE warning light ON	7 to 10 V
IG1 (S1-25) - GND1, 2 (S1-24, 2)	Y - W-B	ECU power supply	Ignition switch ON	11 to 14 V