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Terminals Of Ecu

  1. TERMINALS OF ECU 
    Fig 1: Identifying ECU Connector Terminals
    G04965409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ECU CONNECTOR TERMINAL REFERENCE

    Symbols (Terminal No.) Terminal Description
    GND1 (1) Skid control ECU ground
    +BM1 (2) Power supply for motor
    FR+ (3) Front wheel speed sensor RH power supply output
    FL- (4) Front wheel speed sensor LH input
    RR+ (5) Rear wheel speed sensor RH power supply output
    RL- (6) Rear wheel speed sensor LH input
    STP (7) Stop light switch input
    TRC+ (8) Kinetic suspension output
    NEC- (10) Center diff. lock indicator light input
    CANH (11) CAN communication line H
    SP1 (12) Speed signal output for combination meter
    D/G (13) Diagnosis tester communication line
    P (14) Shift position indicator P signal input
    INFR (15) (1) Electronic modulated suspension demand output
    STPO (16) Stop light operation relay output
    FR- (17) Front wheel speed sensor RH input
    FL+ (18) Front wheel speed sensor LH power supply output
    RR- (19) Rear wheel speed sensor RH input
    RL+ (20) Rear wheel speed sensor LH power supply output
    EXI4 (21) Transfer indicator (L4) switch input
    TRC- (22) Kinetic suspension output
    TS (24) Sensor test terminal (Signal check switch) input
    CANL (25) CAN communication line L
    EXI (27) Center diff. lock switch input
    PKB (28) Parking brake switch input
    WA (29) ABS warning light output
    BZ (30) Skid control buzzer output
    +BS (31) Power supply for solenoid
    GND2 (32) Skid control ECU ground
    HDCW (33) Downhill assist control indicator light output
    IND (34) SLIP indicator light output
    WT (35) VSC OFF indicator light output
    VSCW (36) VSC TRAC warning light output
    FRO (37)(1) Front RH wheel speed output
    FLO (38)(1) Front LH wheel speed output
    LBL (41) Brake fluid level warning switch input
    WFSE (42) Write flash enable input
    CSW (43)(1) Suspension control ECU monitor input
    HDCS (44) Downhill assist control switch input
    STP2 (45) Stop light switch input
    IG1 (46) IG1 power supply
    (1) Electronic modulated suspension and rear air suspension system
    Fig 2: Identifying Skid Control ECU Connector Terminals
    G04965410Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ECU CONNECTOR TERMINAL REFERENCE

    Symbols (Terminal No.) Terminal Description
    IG2 (1) IG2 power supply
    +BM2 (2) Power supply for motor
    BRL (3) BRAKE warning light output
    GND3 (4) Skid control ECU ground
  2. 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 as the connector is watertight.

    Fig 3: Identifying S37 And S38 Connector Terminals
    G05262680Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    +BM1 (S37-2) - GND (S37-1, 32) (S38-4) B-Y - W-B Power supply for motor (From battery) Always 10 to 14 V
    STP (S37-7) - GND (S37-1, 32) (S38-4) G-Y - W-B Stop light switch input Stop light switch ON → OFF (Brake pedal depressed → released) 8 to 14 V → Below 15 V
    P (S37-14) - GND (S37-1, 32) (S38-4) G-B - W-B Shift position indicator P signal input Ignition switch ON, shift P position → any shift position except P 8 to 14 V → Below 15V
    PKB (S37-28) - GND (S37-1, 32) (S38-4) LG - W-B Parking brake switch input Ignition switch ON, parking brake switch ON → OFF Below 1 5 V → 10 to 14 V
    +BS (S37-31) - GND (S37-1, 32) (S38-4) Y - W-B Power supply for solenoid (From battery) Always 10 to 14 V
    LBL (S37-41) - GND (S37-1, 32) (S38-4) LG - W-B Brake fluid level warning switch input Brake fluid level is - 5 mm from the minimum level → maximum level Below 1 → → 1 9 to 2 1 kΩ
    STP2 (S37-45) - GND (S37-1,32) (S38-4) G - W-B Stop light switch input Stop light switch ON → OFF (Brake pedal depressed → released) 8 to 14 V → Below 1 5V
    IG1 (S37-46) - GND (S37-1, 32) (S38-4) B-R - W-B IG1 power supply Ignition switch OFF → ON Below 1 V → 10 to 14 V
    IG2 (S38-1) - GND (S37-1, 32) (S38-4) B-O - W-B IG2 power supply Ignition switch OFF → ON Below 1 V → 10 to 14 V
    +BM2 (S38-2) - GND (S37-1, 32) (S38-4) B-Y - W-B Power supply for motor (From battery) Always 10 to 14 V
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