Terminals Of Ecu

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.

Terminals of ECU

Fig 1: Identifying Skid Control ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TERMINAL DESCRIPTION CHART

Symbols (Terminals No.)	Terminal Description
+BS (A15-1)	Solenoid valve power supply
GND1 (A15-2)	Skid control ECU ground
CANL (A15-5)	CAN communication line L
CANH (A15-6)	CAN communication line H
FL- (A15-8)	Front LH wheel speed signal input
FL+ (A15-9)	Front LH wheel speed sensor power supply
STP (A15-10)	Stop light switch input
RL+ (A15-11)	Rear LH wheel speed sensor power supply
RL- (A15-12)	Rear LH wheel speed signal input
+BM (A15-23)	Motor relay power supply
GND2 (A15-24)	Actuator pump motor ground
IG1 (A15-25)	ECU power supply
FR- (A15-30)	Front RH wheel speed signal input
FR+ (A15-31)	Front RH wheel speed sensor power supply
RR+ (A15-33)	Rear RH wheel speed sensor power supply
RR- (A15-34)	Rear RH wheel speed signal input

Fig 2: Identifying Main Body ECU Connectors Terminals (Rear View)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TERMINAL DESCRIPTION CHART

Symbols (Terminals No.)	Terminal Description
PKB (4C-2)	Parking brake switch input

Terminal inspection

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

HINT:

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

Fig 3: Identifying Skid Control ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard:

VOLTAGE AND RESISTANCE SPECIFICATION

Symbols	Wiring Color	Terminal Description	Conditions	Specified Conditions
+BS (A15-1) - Body ground	W - Body ground	Solenoid valve power supply	Always	11 to 14 V
GND1 (A15-2) - Body ground	W-B - Body ground	Skid control ECU ground	Always	Below 1 Ω
STP (A15-10) - Body ground	G - Body ground	Stop light switch input	Stop light switch ON Brake pedal depressed	8 to 14 V
STP (A15-10) - Body ground	G - Body ground	Stop light switch input	Stop light switch OFF Brake pedal released	Below 1.5 V
+BM (A15-23) - Body ground	B - Body ground	Motor relay power supply	Always	11 to 14 V
GND2 (A15-24) - Body ground	W-B - Body ground	Actuator pump motor ground	Always	Below 1 Ω
IG1 (A15-25) - Body ground	B - Body ground	ECU power supply	Ignition switch ON	11 to 14 V

Fig 4: Identifying Main Body ECU Terminals

Standard resistance:

RESISTANCE SPECIFICATION

Symbols	Wiring Color	Terminal Description	Conditions	Specified Conditions
PKB (4C-2) - Body ground	Y - Body ground	Parking brake switch input	Parking brake switch ON	Below 1 Ω
PKB (4C-2) - Body ground	Y - Body ground	Parking brake switch input	Parking brake switch OFF	10 kΩ or higher