ELECTRONICALLY CONTROLLED BRAKE SYSTEM TERMINALS OF ECU


  1. SKID CONTROL ECU ASSEMBLY

    A01FSI9E04
    Text in Illustration
    *a

    Component without harness connected

    (Skid Control ECU Assembly)

    		 - -
    Terminal No. (Symbol) Terminal Description
    A15-1 (SKS2) Brake pedal stroke sensor 2 signal input
    A15-2 - (Not used)
    A15-3 (SKS) Brake pedal stroke sensor 1 signal input
    A15-4 (SKG) Brake pedal stroke sensor ground
    A15-5 (VCSK) Brake pedal stroke sensor power supply output
    A16-1 (GND4) Skid control ECU assembly ground 4
    A16-2 (EXO)*3 Emergency brake signal output
    A16-3 (FLR-) Front reduction solenoid LH (-) output
    A16-4 (FLR+) Front reduction solenoid LH (+) output
    A16-5 No pin
    A16-6 (SMC2) Master cut solenoid 2 output
    A16-7 (PCK2) Pressure sensor 2 stuck check output
    A16-8 (CANL) CAN communication line 3 (Sub bus 15)
    A16-9 (CANH) CAN communication line 3 (Sub bus 15)
    A16-10 (RR-) Rear wheel speed sensor RH (-) input
    A16-11 (RR+) Rear wheel speed sensor RH (+) power supply output
    A16-12 No pin
    A16-13 - (Not used)
    A16-14 (PMC2) Master cylinder pressure sensor 2 signal input
    A16-15 (FL-) Front wheel speed sensor LH (-) input
    A16-16 (FL+) Front wheel speed sensor LH (+) power supply output
    A16-17 (FLA+) Front addition solenoid LH (+) output
    A16-18 (FLA-) Front addition solenoid LH (-) output
    A16-19 No pin
    A16-20 (RRA+) Rear addition solenoid RH (+) output
    A16-21 (RRA-) Rear addition solenoid RH (-) output
    A16-22 (+BI4) +B power source 4
    A16-23 (HZRI) Brake hold switch input
    A16-24 - (Not used)
    A16-25 (STP) Stop light switch input
    A16-26 No pin
    A16-27 (SG2) Pressure sensor 2 shield ground
    A16-28 (VCM2) Pressure sensor 2 power supply output
    A16-29 (CA1L) CAN communication line 1 (V bus)
    A16-30 (CA1H) CAN communication line 1 (V bus)
    A16-31 (STPO) Stop light illumination output
    A16-32 (BS02) Master cut solenoid 2 power supply output
    A16-33 (RRR-) Rear reduction solenoid RH (-) output
    A16-34 (RRR+) Rear reduction solenoid RH (+) output
    A16-35 No pin
    A16-36 (MR2) ABS motor relay 2 power supply output
    A16-37 (R2-) ABS motor relay 2 output
    A16-38 (+BI2) +B power source 2
    A16-39 - (Not used)
    A16-40 (CBI2) Capacitor power supply input 2
    A16-41 (FAIL) Capacitor 2 signal input
    A16-42 No pin
    A16-43 (PRR) Rear wheel cylinder pressure sensor RH signal input
    A16-44 (E2) Pressure sensor 2 ground
    A16-45 (PFL) Front wheel cylinder pressure sensor LH signal input
    A16-46 (IG2) IG2 power supply
    A14-1 (GND) Skid control ECU assembly ground
    A14-2 - (Not used)
    A14-3 (FRR-) Front reduction solenoid RH (-) output
    A14-4 (FRR+) Front reduction solenoid RH (+) output
    A14-5 (SMC1) Master cut solenoid 1 output
    A14-6 (CA2L) CAN communication line 3 (Sub bus 9)
    A14-7 (CA2H) CAN communication line 3 (Sub bus 9)
    A14-8 (ENA) Capacitor signal output
    A14-9 (PCK1) Pressure sensor 1 stuck check output
    A14-10 (RL-) Rear wheel speed sensor LH (-) input
    A14-11 (RL+) Rear wheel speed sensor LH (+) power supply output
    A14-12 (SG1) Pressure sensor 1 shield ground
    A14-13 (SG3) Pressure sensor 1 shield ground
    A14-14 (PMC1) Master cylinder pressure sensor 1 signal input
    A14-15 (FR-) Front wheel speed sensor RH (-) input
    A14-16 (FR+) Front wheel speed sensor RH (+) power supply output
    A14-17 (FRA+) Front addition solenoid RH (+) output
    A14-18 (FRA-) Front addition solenoid RH (-) output
    A14-19 (RLA+) Rear addition solenoid LH (+) output
    A14-20 (RLA-) Rear addition solenoid LH (-) output
    A14-21 - (Not used)
    A14-22 (BZ) Skid control buzzer assembly output
    A14-23 (SP1) Speedometer signal output
    A14-24 (STP2) Stop light signal input
    A14-25 (CTY)

    Front door courtesy light switch assembly LH signal input*1

    Front door courtesy light switch assembly RH signal input*2
    A14-26 (PAC1) Accumulator pressure sensor 1 signal input
    A14-27 (VCM) Pressure sensor 1 power supply output
    A14-28 (E) Pressure sensor 1 ground
    A14-29 (+BI3) +B power source 3
    A14-30 - (Not used)
    A14-31 - (Not used)
    A14-32 (BS01) Master cut solenoid 1 power supply output
    A14-33 (RLR-) Rear reduction solenoid LH (-) output
    A14-34 (RLR+) Rear reduction solenoid LH (+) output
    A14-35 (MR1) ABS motor relay 1 power supply output
    A14-36 (R1-) ABS motor relay 1 output
    A14-37 (MTT) ABS motor relay test input
    A14-38 (CBI1) Capacitor 1 power supply input
    A14-39 (CSW) VSC OFF switch input
    A14-40 - (Not used)
    A14-41 (VBZ) Skid control buzzer assembly power supply output
    A14-42 (PRL) Rear wheel cylinder pressure sensor LH signal input
    A14-43 (+BI1) +B power source 1
    A14-44 (PFR) Front wheel cylinder pressure sensor RH signal input
    A14-45 (LBL) Brake fluid level warning switch input
    A14-46 (IG1) IG1 power source input

    • *1: for LHD

    • *2: for RHD

    • *3: w/ Emergency Brake Signal

  2. TERMINAL INSPECTION


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

      A01FVTLE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Skid Control ECU Assembly)

      		 - -

      Tech Tips

      Voltage cannot be measured with the connector connected to the skid control ECU assembly as the connector is watertight.

      Standard
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A16-1 (GND4) - Body ground W-B - Body ground Skid control ECU assembly ground 4 Always Below 1 Ω
      A16-22 (+BI4) - Body ground LG - Body ground +B power source 4 Always 11 to 14 V
      A16-23 (HZRI) - Body ground SB - Body ground Brake hold switch input Brake hold switch held ON → OFF (Released) Below 2.5 Ω → 1MΩ or higher
      A16-25 (STP) - Body ground R - Body ground Stop light switch input

      Stop light switch ON → OFF

      (Brake pedal depressed → released)

      		 11 to 14 V → Below 1.5 V
      A16-38 (+BI2) - Body ground V - Body ground +B power source 2 Always 11 to 14 V
      A16-46 (IG2) - Body ground B - Body ground IG2 power source input Power switch on (IG) 11 to 14 V
      A14-1 (GND) - Body ground W-B - Body ground Skid control ECU assembly ground Always Below 1 Ω
      A14-24 (STP2) - Body ground W - Body ground Stop light signal input

      Stop light switch ON → OFF

      (Brake pedal depressed → released)

      		 11 to 14 V → Below 1.5 V
      A14-25 (CTY) - Body ground R - Body ground

      Front door courtesy light switch LH signal input*1

      Front door courtesy light switch RH signal input*2

      		 Driver door closed → open Pulse generation → Below 1 V
      A14-29 (+BI3) - Body ground LG - Body ground +B power source 3 Always 11 to 14 V
      A14-39 (CSW) - Body ground L - Body ground VSC OFF switch input VSC OFF switch held ON → OFF (Released) Below 1 Ω → 10 kΩ or higher
      A14-43 (+BI1) - Body ground B - Body ground +B power source 1 Always 11 to 14 V
      A14-45 (LBL) - Body ground Y - Body ground Brake fluid level warning switch input Brake fluid level warning switch OFF → ON 1.84 to 2.16 kΩ → Below 1 Ω
      A14-46 (IG1) - Body ground L*1, G*2 - Body ground IG1 power source input Power switch on (IG) 11 to 14 V

      • *1: for LHD

      • *2: for RHD