Lexus IS250 IS220d GSE20 ALE20 - BRAKE CONTROL
VEHICLE STABILITY CONTROL SYSTEM (w/o VDIM) - TERMINALS OF ECU
| Terminal of ECU |
(*1): AFS
(*2): A/T
| 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 |
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 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
LEXUS IS250, IS220d / GSE20 ALE20