Terminals Of Ecu

Terminals of ECU

Fig 1: Identifying Terminals Of ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

ECU TERMINALS REFERENCE

Symbols (Terminal No.)	Terminal Description
GND2 (1)	Actuator pump motor ground
+BM (2)	Motor relay power supply
+BS (3)	Solenoid valves power supply
GND1 (4)	Skid control ECU ground
FL+ (5)	Front LH (+) wheel speed signal input
FL- (6)	Front LH (-) wheel speed signal input
RL+ (7)	Rear LH (+) wheel speed signal input
RR- (8)	Rear RH (-) wheel speed signal input
FR- (9)	Front RH (-) wheel speed signal input
FR+ (10)	Front RH (+) wheel speed signal input
D/G (11)	Diagnosis tester communication line
RRO (13)	Rear right wheel speed signal output
PKB (14)	Parking brake switch input
CANL (15)	CAN communication line L
RL- (17)	Rear LH (-) wheel speed signal input
IG1 (18)	ECU power supply
RR+ (19)	Rear RH (+) wheel speed signal input
STP (20)	Stop light switch input
SP1 (23)	Speed signal output for speedometer
RLO (24)	Rear left wheel speed signal output
TS (25)	Sensor check input
CANH (26)	CAN communication line H

Terminal inspection

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

HINT:

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

Fig 2: Inspecting Terminal

SKID CONTROL ECU CONNECTOR TERMINALS REFERENCE

Symbols (Terminals No.)	Wiring Color	Terminal Description	Condition	Specified Condition
GND2 (1) - Body ground	W-B - Body ground	Actuator pump motor ground	Always	Below 1 Ω
+BM (2) - Body ground	B - Body ground	Motor relay power supply	Always	10 to 14 V
+BS (3) - Body ground	W - Body ground	Solenoid valves power supply	Always	to 14 V
GND1 (4) - Body ground	W-B - Body ground	Skid control ECU ground	Always	Below 1 Ω
PKB (14) - Body ground	L - Body ground	Parking brake switch input	Parking brake switch ON	Below 1 Ω
PKB (14) - Body ground	L - Body ground	Parking brake switch input	Parking brake switch OFF	10 to 14 V
IG1 (18) - Body ground	BR - Body ground	ECU power supply	Ignition switch on (IG)	10 to 14 V
STP (20) - Body ground	L-B - Body ground	Stop light switch input	Stop light switch ON (Brake pedal depressed)	8 to 14 V
STP (20) - Body ground	L-B - Body ground	Stop light switch input	Stop light switch OFF (Brake pedal released)	Below 3 V