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Home >> Scion >> 2004 >> xB Standard >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Abs With EBD & BA & TRAC & VSC System - Diagnosis >> Terminals Of Ecu

Terminals Of Ecu

Fig 1: Identifying ECU Terminals
G03367803Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
ECU TERMINALS REFERENCE

Symbols (Terminals No.) Wiring Color Condition Terminal Description STD Voltage (V)
BM (S3 - 2) - GND (S3 - 1, 32) B-R - W-B IG switch ON, pump motor running Motor relay test input 11 to 14
FR+ (S3 - 3) - FR- (S3 - 17) BR-Y - BR IG switch ON, slowly turn right front wheel Front RH wheel speed signal input AC generation
FL+ (S3 - 18) - FL- (S3 - 4) R - G IG switch ON, slowly turn left front wheel Front LH wheel speed signal input AC generation
RR+ (S3 - 5) - RR- (S3 - 19) LG-B - LG-R IG switch ON, slowly turn right rear wheel Rear RH wheel speed signal input AC generation
RL+ (S3 - 20) - RL- (S3 - 6) Y - B IG switch ON, slowly turn left rear wheel Rear LH wheel speed signal input AC generation
TRC+ (S3 - 8) - TRC- (S3 - 22) GR-R - L-B IG switch ON ECM communication output Pulse generation
ENG+ (S3 - 9) - ENG - (S3 - 23) LG-B - LG-R IG switch ON ECM communication input Pulse generation
NEO (S3 - 10) - GND (S3 - 1, 32) V - W-B Engine idling Engine rpm signal input Pulse generation
CANH (S3 - 11) - CANL (S3 - 25) B - W IG switch ON CAN communication line Pulse generation
D/G (S3 - 13) - GND (S3 - 1, 32) W - W-B IG switch ON Diagnostic communication line 11 to 14
MRF (S3 - 14) - R+ (S3 - 45) B - R IG switch ON Fail safe motor relay output 11 to 14
MR (S3 - 15) - R+ (S3 - 45) L - R IG switch ON, pump motor running Motor relay output 11 to 14
+BS (S3 - 31) - GND (S3 - 1, 32) B - W-B Always Solenoid relay power supply 11 to 14
STP1 (S3 -27) - GND (S3 - 1, 32) G- W -W-B Stop light switch ON (Brake pedal pushed) Stop light input signal 8 to 14
Stop light switch OFF (Brake pedal released) Stop light input signal Below 1.5
PKB (S3 - 28) - GND (S3 - 1, 32) B - W-B IG switch ON, parking brake switch ON Parking brake switch input Below 1.5
IG switch ON, parking brake switch OFF Parking brake switch input 11 to 14
WA (S3 - 29) - GND (S3 - 1, 32) P - W-B IG switch ON, ABS warning light ON ABS warning light output 11 to 14
IG switch ON, ABS warning light OFF ABS warning light output Below 2.0
Bz (S3 - 30) - GND (S3 - 1, 32) R-W - W-B IG switch ON, VSC buzzer sounds Buzzer output Below 1.0 to 11 to 14
IG switch ON, VSC buzzer does not sound Buzzer output 11 to 14
VSCW (S3 - 36) - GND (S3 - 1, 32) BR-W - W-B IG switch ON, VSC warning light ON VSC warning light output Below 2.0
IG switch ON, VSC warning light OFF VSC warning light output 11 to 14
WFSE (S3 - 42) - GND (S3 - 1, 32) R - W-B IG switch ON WIFSE input 11 to 14
CSW (S3 - 43) - GND (S3 - 1, 32) W-L - W-B TRAC OFF switch OFF TRAC OFF switch input 11 to 14
BRL (S3 - 44) - GND (S3 - 1, 32) B-W - W-B IG switch ON, BRAKE warning light ON Brake warning line output 11 to 14
IG switch ON, BRAKE warning light OFF Brake warning line output Below 2.0
R+ (S3 - 45) - GND (S3 - 1, 32) R - W-B IG switch ON, ABS warning light OFF Power supply for motor relay 11 to 14
IG1 (S3 - 46) - GND (S3 - 1, 32) B-L - W-B IG switch ON IG1 power supply 11 to 14