Vehicle Stability Control System (W/O Vdim) Terminals Of Ecu

Brake. Lexus Is250, Is220D. Gse20 Ale20
Brake Control. Lexus Is250, Is220D. Gse20 Ale20

  1. Terminal of ECU

  1. Terminal Inspection

Vehicle Stability Control System (W/O Vdim) -- Terminals Of Ecu



Terminal of ECU
(*1): AFS
(*2): A/T

Lexus Is250, Is220D. Gse20 Ale20.Brake Control.Vehicle Stability Control System (W/ Vdim).Vehicle Stability Control System (W/O Vdim) Terminals Of Ecu


Symbols (Terminal No.)
Terminal Description
GND2 (1)
Pump motor ground
BM (2)
Motor relay input
FR+ (3)
Front wheel speed RH signal power supply output
FL- (4)
Front wheel speed LH signal input
RR+ (5)
Rear wheel speed RH signal power supply output
RL- (6)
Rear wheel speed LH signal input
FSW+ (7)
Brake pedal load sensing switch input
CANH (11)
CAN communication line H
SP1 (12)
Speed signal output for combination meter
D/G (13)
Diagnosis tester communication line
MRF (14)
Fail safe motor relay output
MR (15)
Motor relay output
STPO (16) (*2)
Stop light control relay output
FR- (17)
Front wheel speed RH signal input
FL+ (18)
Front wheel speed LH signal power supply output
RR- (19)
Rear wheel speed RH signal input
RL+ (20)
Rear wheel speed LH signal power supply output
STP2 (21) (*2)
Stop light control relay input
TS (24)
Test mode (signal check) input
CANL (25)
CAN communication line L
STP1 (27)
Stop light switch input
PKB (28)
Parking brake switch input
BZ (30)
Skid control buzzer output
+BS (31)
Solenoid relay power supply
GND1 (32)
Skid control ECU ground
FRO (37) (*1)
Front wheel speed RH signal output
FLO (38) (*1)
Front wheel speed LH signal output
WFSE (42)
WFSE input
CSW (43)
Traction OFF switch input
R+ (45)
Power supply for motor relay
IG1 (46)
IG1 power supply

Terminal Inspection


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


    Lexus Is250, Is220D. Gse20 Ale20.Brake Control.Vehicle Stability Control System (W/ Vdim).Vehicle Stability Control System (W/O Vdim) Terminals Of Ecu

    HINT:
    Voltage cannot be measured with the connector connected to the skid control ECU because the connector is watertight.

    Standard:

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    GND2 (A14-1) - Body ground
    		W-B - Body ground
    		Pump motor ground
    		Engine switch off
    		Below 1 Ω
    FSW+ (A14-7) - Body ground
    		G-O - Body ground
    		Brake pedal load sensing switch input
    		Stop light switch ON → OFF (Brake pedal depressed → released)
    		0.9 to 1.1 kΩ→ 192 to 234 Ω
    STP2 (A14-21) (*1) - Body ground
    		R-B - Body ground
    		Stop light control relay output
    		Stop light switch ON → OFF (Brake pedal depressed → released)
    		8 to 16 V → Below 1.5 V
    PKB (A14-28) - Body ground
    		Y - Body ground
    		Parking brake switch input
    		Engine switch on (IG), parking brake switch ON → OFF
    		Below 1 Ω → 10 kΩ or higher
    BZ (A14-30) - Body ground
    		Y-B - Body ground
    		Buzzer output
    		Engine switch on (IG), when buzzer not sounding
    		6 to 10 V
    +BS (A14-31) - Body ground
    		BR - Body ground
    		Solenoid relay power supply
    		Always
    		10 to 14 V
    GND1 (A14-32) - Body ground
    		W-B - Body ground
    		Skid control ECU ground
    		Always
    		Below 1 Ω
    CSW (A14-43) - Body ground
    		L-Y - Body ground
    		Traction OFF switch input
    		Traction OFF switch held ON → OFF (Not pressed)
    		Below 1 Ω → 10 kΩ or higher
    IG1 (A14-46) - Body ground
    		B-W - Body ground
    		IG1 power supply
    		Engine switch on (IG)
    		10 to 14 V
    (*1): A/T