LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2019 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Steering >> Steering Control Systems >> Dynamic Rear Steering System - Diagnostics - Introduction >> Dynamic Rear Steering System >> Terminals Of Ecu [12/2017 - 10/2023] >> Terminals Of Ecu [12/2017 - 10/2023]

Terminals Of Ecu [12/2017 - 10/2023]

  1. TERMINALS OF ECU 

    HINT: 

    The DRS ECU (rear steering control ECU) uses waterproof connectors. Therefore, checking the voltage at the terminals and checking the waveforms with an oscilloscope cannot be performed with the ECU installed to the vehicle.

    Fig 1: DRS ECU (Rear Steering Control ECU) Connector End View
    GTY779122Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component without harness connected
    (DRS ECU [Rear Steering Control ECU])    		 - -
    Terminal No. Symbol Terminal Description
    P4-2 CANH CAN communication input/output
    P4-3 CANL CAN communication input/output
    P4-4 PIG Motor power supply input
    P4-5 GNDY Power ground
    P4-6 CN2+ CAN communication input/output
    P4-7 CN2- CAN communication input/output
    P4-8 CAN- Local CAN communication input/output
    P4-9 IGY IG power supply input
    P4-11 CAN+ Local CAN communication input/output
    z19-1 V V phase motor output
    z19-2 U U phase motor output
    z19-3 W W phase motor output
    z20-1 MSG2 Motor resolver sensor shielded ground
    z20-2 MRG Motor resolver sensor excitation circuit ground
    z20-3 MRV Motor resolver sensor excitation output
    z20-4 ARV Stroke sensor excitation output
    z20-5 ARG Stroke sensor excitation circuit ground
    z20-7 MS2 Motor resolver sensor SIN phase input
    z20-8 MS1 Motor resolver sensor COS phase input
    z20-12 AS1 Stroke sensor COS phase input
    z20-13 AS2 Stroke sensor SIN phase input
  2. CHECK DRS ECU (REAR STEERING CONTROL ECU) 
    1. Disconnect the P4 DRS ECU (rear steering control ECU) connector.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 2: U1 DRS ECU (rear Steering Control ECU) Connector End View
      GTY507336Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      STANDARD RESISTANCE

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      8 (CAN-) - 11 (CAN+) W - B Local CAN communication input/output Always 100 to 140 Ω
      *a Component without harness connected
      (DRS ECU [Rear Steering Control ECU])
  3. CHECK DRS ECU (REAR STEERING CONTROL ECU) WIRE HARNESS SIDE CONNECTOR 
    1. Disconnect the P4 DRS ECU (rear steering control ECU) connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      Fig 3: DRS ECU (Rear Steering Control ECU) Wire Harness Side Connector End View
      GTY782278Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      STANDARD VOLTAGE AND RESISTANCE

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      P4-2 (CANH) - P4-3 (CANL) V - W CAN communication input/output Engine switch off 54 to 69 Ω
      P4-4 (PIG) - Body ground B - Body ground Motor power supply input Always 11 to 14 V
      P4-5 (GNDY) - Body ground W-B - Body ground Power ground Always Below 1 Ω
      P4-8 (CAN-) - P4-11 (CAN+) W - B Local CAN communication input/output Engine switch off 100 to 140 Ω
      P4-9 (IGY) - Body ground L - Body ground IG power supply input Engine switch on (IG) 11 to 14 V
      *a Front view of wire harness connector
      (to DRS ECU [Rear Steering Control ECU])
  4. CHECK REAR STEERING LINK ASSEMBLY WIRE HARNESS SIDE CONNECTOR 
    Fig 4: Rear Steering Link Assembly Wire Harness Side Connector End View
    GTY838610Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Component without harness connected
    (Rear Steering Link Assembly)    		 - -
    1. Disconnect the rear steering link assembly connector from the DRS ECU (rear steering control ECU).
    2. Measure the resistance according to the value(s) in the table below.
      STANDARD RESISTANCE

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      z19-1 (V) - z19-2 (U) B - R V phase motor output Always Below 1 Ω
      z19-2 (U) - z19-3 (W) R - W U phase motor output Always Below 1 Ω
      z19-3 (W) - z19-1 (V) W - B W phase motor output Always Below 1 Ω
      z20-2 (MRG) - z20-3 (MRV) B - W Motor resolver sensor Always 26 to 64 Ω
      z20-2 (MRG) - z20-7 (MS2) B - G Motor resolver sensor Always 98 to 247 Ω
      z20-2 (MRG) - z20-8 (MS1) B - R Motor resolver sensor Always 92 to 230 Ω
      z20-3 (MRV) - z20-7 (MS2) W - G Motor resolver sensor Always 124 to 311 Ω
      z20-3 (MRV) - z20-8 (MS1) W - R Motor resolver sensor Always 118 to 294 Ω
      z20-7 (MS2) - z20-8 (MS1) G - R Motor resolver sensor Always 190 to 477 Ω
      z20-4 (ARV) - z20-5 (ARG) W - B Stroke sensor Always 5 to 50 Ω
      z20-4 (ARV) - z20-12 (AS1) W - R Stroke sensor Always 4 to 5 kΩ
      z20-4 (ARV) - z20-13 (AS2) W - G Stroke sensor Always 12 to 14.5 kΩ
      z20-5 (ARG) - z20-12 (AS1) B - R Stroke sensor Always 4 to 5 kΩ
      z20-5 (ARG) - z20-13 (AS2) B - G Stroke sensor Always 12 to 14.5 kΩ
      z20-12 (AS1) - z20-13 (AS2) R - G Stroke sensor Always 16 to 19 kΩ
scientia non olet · About LEMON Manuals