Terminals Of Ecu

WARNING: This page is about a different car, the 2006 Scion tC. However, it is still accessible from the selected car via links, so may be relevant.

TERMINALS OF ECU

Fig 1: Identifying Terminals Of ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TERMINALS OF ECU REFERENCE CHART

Symbols (Terminal No.)	Terminal Description
+BS (S1-1)	Solenoid valve power supply
GND1 (S1-2)	Skid control ECU ground
WTIR (S1-5)	Tire pressure warning light output
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 (1-S13)	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
INIT (S1-19)	TPWS switch input
+BM (S1-23)	Motor relay power supply
GND2 (1-S24)	Actuator pump motor ground
IG1 (S1-25)	ECU power supply
SP1 (S1-26)	Speed signal output for meter
TSI (1-S27)	Outside temperature sensor input
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 Terminals Of ECU

TERMINALS OF ECU REFERENCE CHART

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