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

Brake. Lexus Is250, Is220D. Gse20 Ale20
Brake Control. Lexus Is250, Is220D. Gse20 Ale20
  1. CHECK BATTERY VOLTAGE

  1. SKID CONTROL ECU INSPECTION

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



CHECK BATTERY VOLTAGE
  1. Check the battery voltage.

    Standard voltage:
    10 to 14 V

SKID CONTROL ECU INSPECTION
  1. Measure the voltage between each terminal or between each terminal and the body ground.

  2. Connect the intelligent tester to the DLC3, and check the communication condition with the skid control ECU.



  3. Using an oscilloscope, check that the pulse generates between each terminal or between each terminal and the body ground.

    NOTICE:
    Inspection should be performed from the back of the connector with the connector connected to the skid control ECU.

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

    HINT:
    Inspect the ECU from the wire harness side while the connector is connected.

    Symbols (Terminal No.)
    Wiring Color
    Terminal Description
    Condition
    Specified Condition
    SFRR (A35 (*1), J98 (*2)-1) - Body ground
    GR - Body ground
    Front decrease solenoid RH output
    Approx. 1.5 seconds after turning engine switch on (IG)
    10 to 14 V
    SRLR (A35 (*1), J98 (*2)-2) - Body ground
    R (*1), P (*2) - Body ground
    Rear decrease solenoid LH output
    Approx. 1.5 seconds after turning engine switch on (IG)
    10 to 14 V
    MR (A35 (*1), J98 (*2)-3) - Body ground
    L-B (*1), L (*2) - Body ground
    Motor relay output
    Engine switch on (IG)
    10 to 14 V
    FLO (A35 (*1), J98 (*2)-4) - Body ground (*3)
    R-L (*1), B (*2) - Body ground
    Front wheel speed signal LH output
    During the drive
    Pulse generation
    (see waveform 1)
    FRO (A35 (*1), J98 (*2)-5) - Body ground (*3)
    G-W (*1), BR (*2) - Body ground
    Front wheel speed signal RH output
    During the drive
    Pulse generation
    (see waveform 1)
    FR- (A35 (*1), J98 (*2)-7) - Body ground
    G - Body ground
    Front wheel speed sensor RH input
    Vehicle speed (forward or back) input
    Pulse generation
    (see waveform 2)
    FR+ (A35 (*1), J98 (*2)-8) - Body ground
    L - Body ground
    Front wheel speed sensor power supply RH output
    Engine switch on (IG)
    10 to 14 V
    FL+ (A35 (*1), J98 (*2)-9) - Body ground
    P - Body ground
    Front wheel speed sensor power supply LH output
    Engine switch on (IG)
    10 to 14 V
    FL- (A35 (*1), J98 (*2)-10) - Body ground
    L - Body ground
    Front wheel speed sensor LH input
    Vehicle speed (forward or back) input
    Pulse generation
    (see waveform 2)
    R+ (A35 (*1), J98 (*2)-11) - Body ground
    G - Body ground
    Solenoid relay power supply
    Engine switch on (IG)
    10 to 14 V
    SRRR (A35 (*1), J98 (*2)-12) - Body ground
    W-L (*1), O (*2) - Body ground
    Rear decrease solenoid RH output
    Approx. 1.5 seconds after turning engine switch on (IG)
    10 to 14 V
    SFLR (A35 (*1), J98 (*2)-13) - Body ground
    W (*1), SB (*2) - Body ground
    Front decrease solenoid RH output
    Approx. 1.5 seconds after turning engine switch on (IG)
    10 to 14 V
    SSEL (A35 (*1), J98 (*2)-14) - Body ground
    Y-B (*1), Y (*2) - Body ground
    Solenoid characteristic identification input 1
    Engine start
    Low: 0 V (Normal)
    Middle: 3.7 to 8.26 V
    High: 7.8 to 14 V
    SEL2 (A35 (*1), J98 (*2)-16) - Body ground
    B-L (*1), B (*2) - Body ground
    Solenoid characteristic identification input 2
    Engine start
    Low: 0 V (Normal)
    Middle: 3.7 to 8.26 V
    High: 7.8 to 14 V
    FSW+ (A35 (*1), J98 (*2)-18) - Body ground
    G-B (*1), LG (*2) - Body ground
    Brake pedal load sensing switch input
    Stop light switch ON → OFF (Brake pedal depressed → released)
    Approx. 1 kΩ →
    Approx. 213 Ω
    GND3 (A35 (*1), J98 (*2)-22) - Body ground
    W-B - Body ground
    Skid control ECU ground 3
    Always
    Below 1 Ω
    IG1 (J77-1) - Body ground
    B - Body ground
    IG1 power supply
    Engine switch on (IG)
    10 to 14 V
    RL- (J77-3) - Body ground
    B - Body ground
    Rear wheel speed sensor LH input
    Vehicle speed (forward or back) input
    Pulse generation
    (see waveform 2)
    RL+ (J77-4) - Body ground
    LG - Body ground
    Rear wheel speed sensor power supply LH output
    Engine switch on (IG)
    10 to 14 V
    RR+ (J77-5) - Body ground
    B - Body ground
    Rear wheel speed sensor power supply RH output
    Engine switch on (IG)
    10 to 14 V
    RR- (J77-6) - Body ground
    G - Body ground
    Rear wheel speed sensor RH input
    Vehicle speed (forward or back) input
    Pulse generation
    (see waveform 2)
    CSW (J77-7) - Body ground
    P - Body ground
    Traction OFF switch input
    Traction OFF switch ON → OFF
    Below 1 Ω →
    10 kΩ or higher
    CANH (J77-8) - Body ground
    R - Body ground
    CAN communication line H
    Engine switch off
    54 to 67 Ω
    SP1 (J77-9) - Body ground
    V - Body ground
    Speed signal output for combination meter
    During the drive
    Pulse generation
    (see waveform 3)
    STP (J77-10) - Body ground
    R - Body ground
    Stop light switch input
    Stop light switch ON → OFF (Brake pedal depressed → released)
    10 to 14 V →
    Below 1.5 V
    BZ (J77-11) - Body ground
    L - Body ground
    Skid control buzzer output
    Engine switch on (IG), buzzer sounds → does not sound
    Below 1 V →
    10 to 14 V
    D/G (J77-12) - Body ground
    R - Body ground
    Diagnosis tester communication line
    Engine switch on (IG)
    10 to 14 V
    TS (J77-13) - Body ground
    SB - Body ground
    Sensor check activation input
    Engine switch on (IG), terminals TS and CG of DLC3 connect → disconnect
    Below 1.5 V →
    10 to 14 V
    PKB (J77-14) - Body ground
    R-B - Body ground
    Parking brake switch input
    Engine switch on (IG), parking brake switch ON → OFF
    Below 1 Ω →
    10 kΩ or higher
    WFSE (J77-15) - Body ground
    GR - Body ground
    ECU program rewrite input
    -
    -
    CANL (J77-16) - Body ground
    W - Body ground
    CAN communication line L
    Engine switch off
    54 to 67 Ω
    MRF (J78-1) - Body ground
    L-B - Body ground
    Fail safe motor relay output
    Approx. 1.5 seconds after turning engine switch on (IG)
    Below 1 V
    SR (J78-2) - Body ground
    V - Body ground
    Solenoid relay output
    Approx. 1.5 seconds after turning engine switch on (IG)
    Below 1 V
    PMC (J78-4) - Body ground
    R - Body ground
    Master cylinder pressure sensor input
    Engine switch on (IG), brake pedal released
    0.3 to 0.8 V
    E2 (J78-6) - Body ground
    W - Body ground
    Master cylinder pressure sensor ground
    Always
    Below 1 Ω
    RRA+ (J78-7) - Body ground
    L - Body ground
    Rear holding solenoid (+) RH output
    Approx. 1.5 seconds after turning engine switch on (IG)
    10 to 14 V
    FLA- (J78-8) - Body ground
    W - Body ground
    Front holding solenoid (-) LH output
    Approx. 1.5 seconds after turning engine switch on (IG)
    10 to 14 V
    RLA+ (J78-9) - Body ground
    G - Body ground
    Rear holding solenoid (+) LH output
    Approx. 1.5 seconds after turning engine switch on (IG)
    10 to 14 V
    FRA- (J78-10) - Body ground
    GR - Body ground
    Front holding solenoid (-) RH output
    Approx. 1.5 seconds after turning engine switch on (IG)
    10 to 14 V
    SM2+ (J78-11) - Body ground
    B - Body ground
    Master cut linear solenoid 2 (+) output
    Approx. 1.5 seconds after turning engine switch on (IG)
    Below 1 V
    SM1- (J78-12) - Body ground
    R - Body ground
    Master cut linear solenoid 1 (-) output
    Approx. 1.5 seconds after turning engine switch on (IG)
    Below 1 V
    AST (J78-13) - Body ground
    Y - Body ground
    Linear solenoid power supply
    Approx. 1.5 seconds after turning engine switch on (IG)
    10 to 14 V
    GND2 (J78-14) - Body ground
    W-B - Body ground
    Skid control ECU ground 2
    Always
    Below 1 Ω
    MT (J78-15) - Body ground
    GR - Body ground
    Motor relay test input
    Approx. 1.5 seconds after turning engine switch on (IG)
    Below 1 V
    VCM (J78-18) - Body ground
    B - Body ground
    Master cylinder pressure sensor power supply output
    Engine switch on (IG)
    4.5 to 5.5 V
    FSS (J78-19) - Body ground
    -
    Master cylinder pressure sensor shielded ground
    Always
    Below 1 Ω
    RRA- (J78-20) - Body ground
    O - Body ground
    Rear holding solenoid (-) RH output
    Approx. 1.5 seconds after turning engine switch on (IG)
    10 to 14 V
    FLA+ (J78-21) - Body ground
    V - Body ground
    Front holding solenoid (+) LH output
    Approx. 1.5 seconds after turning engine switch on (IG)
    10 to 14 V
    RLA- (J78-22) - Body ground
    P - Body ground
    Rear holding solenoid (-) LH output
    Approx. 1.5 seconds after turning engine switch on (IG)
    10 to 14 V
    FRA+ (J78-23) - Body ground
    LG - Body ground
    Front holding solenoid (+) RH output
    Approx. 1.5 seconds after turning engine switch on (IG
    10 to 14 V
    SM2- (J78-24) - Body ground
    BR - Body ground
    Master cut linear solenoid 2 (-) output
    Approx. 1.5 seconds after turning engine switch on (IG)
    Below 1 V
    SM1+ (J78-25) - Body ground
    SB - Body ground
    Master cut linear solenoid 1 (+) output
    Approx. 1.5 seconds after turning engine switch on (IG)
    Below 1 V
    GND1 (J78-26) - Body ground
    W-B - Body ground
    Skid control ECU ground 1
    Always
    Below 1 Ω
    (*1): LHD
    (*2): RHD
    (*3): AFS


  4. Lexus Is250, Is220D. Gse20 Ale20.Brake Control.Vehicle Stability Control System (W/ Vdim).Vehicle Stability Control System (W/ Vdim)  Terminals Of Ecu
  5. Waveform 1 (Reference): Using an oscilloscope:

    Item
    Condition
    Tool setting
    5 V/DIV., 5 ms./DIV.
    Vehicle condition
    While driving at approximately 12 mph (20 km/h)
    HINT:
    As the vehicle speed (tire rotating speed) becomes faster, the cycle becomes shorter.


  6. Lexus Is250, Is220D. Gse20 Ale20.Brake Control.Vehicle Stability Control System (W/ Vdim).Vehicle Stability Control System (W/ Vdim)  Terminals Of Ecu
  7. Waveform 2 (Reference): Using an oscilloscope:

    Item
    Condition
    Tool setting
    0.5 V/DIV., 2 ms./DIV.
    Vehicle condition
    Forward or back
    HINT:
    As the vehicle speed (tire rotating speed) becomes faster, the cycle becomes shorter.


  8. Lexus Is250, Is220D. Gse20 Ale20.Brake Control.Vehicle Stability Control System (W/ Vdim).Vehicle Stability Control System (W/ Vdim)  Terminals Of Ecu
  9. Waveform 3 (Reference): Using an oscilloscope:

    Item
    Condition
    Tool setting
    5 V/DIV., 50 ms./DIV.
    Vehicle condition
    While driving at approximately 12 mph (20 km/h)
    HINT:
    As the vehicle speed (tire rotating speed) becomes faster, the cycle becomes shorter.