2007 Lexus LX 470FACTORY OEM SERVICE PROCEDURE

Terminals Of Ecu

  1. CHECK SKID CONTROL ECU 
    Fig 1: Identifying Skid Control ECU Connectors Terminals
    G05283239Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and resistance of the connectors.
      TERMINALS REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      SA1 (A39-2) - GND (A39-6, 31, A40-8, 17) G - W-B Front RH ABS switching solenoid output Ignition switch ON, ABS warning light OFF 10 to 14 V
      SA2 (A39-3) - GND (A39-6, 31, A40-8, 17) B - W-B Front LH ABS switching solenoid output Ignition switch ON, ABS warning light OFF 10 to 14 V
      SA3 (A39-4) - GND (A39-6, 31, A40-8, 17) G-W - W-B Rear ABS switching solenoid output Ignition switch ON, ABS warning light OFF 10 to 14 V
      STR (A39-5) - GND (A39-6, 31, A40-8, 17) G-Y - W-B VSC switching solenoid output Ignition switch ON, ABS warning light OFF 10 to 14 V
      SFLR (A39-7) - GND (A39-6, 31, A40-8, 17) B-Y - -W-B Front left decompression solenoid output Ignition switch ON, ABS warning light OFF 10 to 14 V
      SRRH (A39-8) - GND (A39-6, 31, A40-8, 17) W - W-B Rear right holding solenoid output Ignition switch ON, ABS warning light OFF 10 to 14 V
      SRRR (A39-9) - GND (A39-6, 31, A40-8, 17) B-O - W-B Rear right decompression solenoid output Ignition switch ON, ABS warning light OFF 10 to 14 V
      VCM (A39-10) - E2 (A39-12) B - W Master cylinder pressure sensor power source Ignition switch ON 4.5 to 5.5 V
      PH (A39-11) - GND (A39-6, 31, A40-8, 17) O - W-B Pressure switch (high) input Ignition switch ON, pressure switch (PH) ON Below 1 V
      PH (A39-11) - GND (A39-6, 31, A40-8, 17) O - W-B Pressure switch (high) input Ignition switch ON, pressure switch (PH) OFF 5 to 8 V
      FR+ (A39-14) - FR- (A39-13) L - P Front right wheel speed sensor input Ignition switch ON, slowly turn right front wheel Pulse generation
      FL+ (A39-16) - FL- (A39-15) R - G Front left wheel speed sensor input Ignition switch ON, slowly turn left front wheel Pulse generation
      SR (A39-19) - R1+ (A39-1) G - Y-P Solenoid relay output Ignition switch ON, ABS warning light OFF 10 to 14 V
      SFLH (A39-21) - GND (A39-6, 31, A40-8, 17) Y - W-B Front left holding solenoid output Ignition switch ON, ABS warning light OFF 10 to 14 V
      PMC (A39-22) - E2 (A39-12) R - W Master cylinder pressure sensor input Ignition switch ON, stop light switch OFF 0.3 to 0.7 V
      E2 (A39-12) - GND (A39-6, 31, A40-8, 17) W - W-B ACC pressure sensor ground Ignition switch OFF Below 1 Ω
      MTT (A39-27) - GND (A39-6, 31, A40-8,17) B-R - W-B Motor test input Ignition switch ON (Motor relay is OFF) Below 1.5 V
      MT+ (A39-28) - MT- (A39-18) L - GR Motor relay input Ignition switch ON Below 1.5 V
      MR1 (A39-29) - R1+ (A39-1) R - P Motor relay output 1 Ignition switch ON, hydraulic brake booster pump motor ON 10 to 14 V
      WA (A40-1) - GND(A39-6, 31, A40-8, 17) R-L - W-B ABS warning light output Ignition switch ON, ABS warning light OFF Below 2.0 V
      BZ (A40-2) - GND (A39-6, 31, A40-8, 17) L - W-B VSC buzzer output Ignition switch ON, VSC buzzer is sounded Below 1.5 V
      D/G (A40-3) - GND (A39-6, 31, A40-8, 17) V-W - W-B Diagnostics tester communication line Ignition switch ON 10 to 14 V
      P (A40-5) - GND (A39-6, 31, A40-8, 17) G-W - W-B Shift position indicator "P" input Ignition switch ON, shift lever is in P position 10 to 14 V
      IG1 (A40-6) - GND (A39-6, 31, A40-8, 17) B-W - W-B IG1 power source Ignition switch ON 10 to 14 V
      STP (A40-10) - GND (A39-6, 31, A40-8, 17) G-W - W-B Stop light switch input Stop light switch OFF Below 1.5 V
      STP (A40-10) - GND (A39-6, 31, A40-8, 17) G-W - W-B Stop light switch input Stop light switch ON 10 to 14 V
      TC (A40-11) - GND (A39-6, 31, A40-8, 17) P-B - W-B Terminal TC of DLC3 Ignition switch OFF Below 1 V
      TC (A40-11) - GND (A39-6, 31, A40-8, 17) P-B - W-B Terminal TC of DLC3 Ignition switch ON 10 to 14 V
      TS (A40-12) - GND (A39-6, 31, A40-8, 17) W - W-B Terminal TS of DLC3 Ignition switch OFF Below 1 V
      TS (A40-12) - GND (A39-6, 31, A40-8, 17) W - W-B Terminal TS of DLC3 Ignition switch ON 10 to 14 V
      PKB (A40-13) - GND (A39-6, 31, A40-8, 17) R-W - W-B Parking brake switch input Ignition switch ON, parking brake switch ON Below 1.5 V
      PKB (A40-13) - GND (A39-6, 31, A40-8, 17) R-W - W-B Parking brake switch input Ignition switch ON, parking brake switch OFF 10 to 14 V
      ENG+ (A40-14) - ENG- (A40-22) R - G Translate ECU communication input Ignition switch ON Pulse generation
      RL+ (A40-18) - RL- (A40-19) R - G Rear left wheel speed sensor input Ignition switch ON, slowly turn left rear wheel Pulse generation
      RR+ (A40-20) - RR- (A40-21) B - W Rear right wheel speed sensor input Ignition switch ON, slowly turn right rear wheel Pulse generation
      TRC+ (A40-24) - TRC- (A40-16) Y - L Translate ECU communication output Ignition switch ON Pulse generation
      EXI2 (A41-2) - GND (A39-6, 31, A40-8, 17) B-L - W-B L4 switch input Ignition switch ON, L4 switch ON 8 to 14 V
      EXI2 (A41-2) - GND (A39-6, 31, A40-8, 17) B-L - W-B L4 switch input Ignition switch ON, L4 switch OFF Below 1.5 V
      EXI (A41-3) - GND (A39-6, 31, A40-8, 17) P-B - W-B Center differential lock switch input Ignition switch ON, differential lock switch ON Below 1.5 V
      EXI (A41-3) - GND (A39-6, 31, A40-8, 17) P-B - W-B Center differential lock switch input Ignition switch ON, differential lock switch OFF 10 to 14 V
      VSCW (A41-4) - GND (A39-6, 31, A40-8, 17) L-W - W-B VSC TRAC warning light output Ignition switch ON, VSC TRAC warning light ON Below 2.0 V
      VSCW (A41-4) - GND (A39-6, 31, A40-8, 17) L-W - W-B VSC TRAC warning light output Ignition switch ON, VSC TRAC warning light OFF 10 to 14 V
      BRL (A41-5) - GND (A39-6, 31, A40-8, 17) Y-G - W-B BRAKE warning light output Ignition ON, BRAKE warning light ON 10 to 14 V
      BRL (A41-5) - GND (A39-6, 31, A40-8, 17) Y-G - W-B BRAKE warning light output Ignition ON, BRAKE warning light OFF Below 2.0 V
      IND (A41-6) - GND (A39-6, 31, A40-8, 17) L-B - W-B SLIP indicator light input Ignition switch ON, SLIP indicator light ON Below 2.0 V
      IND (A41-6) - GND (A39-6, 31, A40-8, 17) L-B - W-B SLIP indicator light input Ignition switch ON, SLIP indicator light OFF 10 to 14 V
      WT (A41-7) - GND (A39-6, 31, A40-8, 17) L-R - W-B VSC OFF indicator light input Ignition switch ON, DSC OFF indicator light ON Below 2.0 V
      WT (A41-7) - GND (A39-6, 31, A40-8, 17) L-R - W-B VSC OFF indicator light input Ignition switch ON, VSC OFF indicator light OFF 10 to 14 V
      VYS (A41-9) - GYAW (A41-27) B - R Yaw rate sensor power supply Ignition switch ON 4.5 to 5.5 V
      GL2 (A41-10) - GYAW (A41-27) Y - R Decelerate sensor input2 Ignition switch ON, vehicle is on level surface 2.0 to 3.0 V
      SS1+ (A41-14) - SS1- (A41-23) W - G Steering sensor (+) input Engine idling, slowly turn steering wheel Pulse generation
      INFR (A41-15) - GND (A39-6, 31, A40-8, 17) B-R - W-B VSC TRAC indicator light input Ignition switch ON, VSC TRAC indicator light ON Below 1.5 V
      INFR (A41-15) - GND (A39-6, 31, A40-8, 17) B-R - W-B VSC TRAC indicator light input Ignition switch ON, VSC TRAC indicator light OFF 10 to 14 V
      YD (A41-19) - GND (A39-6, 31, A40-8, 17) L - W-B Yaw rate signal diagnosis output Approximately 1 sec. after ignition switch ON 4.5 to 5.3 V
      GL1 (A41-22) - GYAW (A41-27) G - R Decelerate sensor input1 Ignition switch ON, vehicle is on level surface 2.0 to 3.0 V
      FRO (A41-24) - GND (A39-6, 31, A40-8, 17) R-W - W-B Front right wheel speed output Vehicle driving at about 20 km/h (12 mph) Pulse generation
      FLO (A41-25) - GND (A39-6, 31, A40-8, 17) R-Y - W-B Front left wheel speed output Vehicle driving at about 20 km/h (12 mph) Pulse generation
      GYAW (A41-27) - GND (A39-6, 31, A40-8, 17) R - W-B Yaw rate sensor ground Ignition switch OFF Below 1 Ω
      YAW (A41-28) - GYAW (A41-27) W - R Yaw rate sensor input Ignition switch ON, vehicle is in stationary condition 2 to 3 V
      SRLR (A42-1) - GND (A39-6, 31, A40-8, 17) R-G - W-B Rear left decompression solenoid output Ignition switch ON, ABS warning light OFF 10 to 14 V
      MR2 (A42-2) - R2+ (A42-3) Y-B - W-L Motor relay output Ignition switch ON, hydraulic brake booster pump motor stops 10 to 14 V
      AFS+ (A42-5) - AFS-(A42-13) LG-R - GR-B VGRS communication signal Ignition switch ON Pulse generation
      AST (A42-6) - GND (A39-6, 31, A40-8, 17) R-Y - W-B Solenoid relay test input Ignition switch ON, ABS warning light OFF 10 to 14 V
      SRLH (A42-7) - GND (A39-6, 31, A40-8, 17) R-W - W-B Rear left holding solenoid output Ignition switch ON, ABS warning light OFF 10 to 14 V
      SFRR (A42-8) - GND (A39-6, 31, A40-8, 17) B-W - W-B Front right decompression solenoid output Ignition switch ON, ABS warning light OFF 10 to 14 V
      PL (A42-9) - GND (A39-6, 31, A40-8, 17) W - W-B Pressure switch (Low) input Ignition switch ON, pressure switch (PL) ON 3 to 5 V
      PL (A42-9) - GND (A39-6, 31, A40-8, 17) W - W-B Pressure switch (Low) input Ignition switch ON, pressure switch (PL) OFF 7 to 11 V
      SFRH (A42-16) - GND (A39-6, 31, A40-8, 17) LG - W-B Front right holding solenoid output Ignition switch ON, ABS warning light OFF 10 to 14 V
      VSC+ (A42-17) - VSC- (A42-18) V - Y-G VGRS communication signal Ignition switch ON Pulse generation
      TRIG (A42-20) - GND (A39-6, 31, A40-8, 17) L-R - W-B Steering sensor trigger output Ignition switch ON, ABS warning light OFF 10 to 14 V
      +BO (A42-21) - GND (A39-6, 31, A40-8, 17) LG - W-B Steering sensor power source Ignition switch ON, ABS warning light OFF 10 to 14 V
      IG2 (A42-22) - GND (A39-6, 31, A40-8, 17) B-R - W-B IG2 power source Ignition switch ON 10 to 14 V
  2. CHECK TRANSLATE ECU 
    Fig 2: Identifying Translate ECU Connector Terminals
    G05283240Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage of the connector.
      TERMINALS REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG1 (T39-1) - GND (T39-40) B-W - W-B IG1 power source Ignition switch ON 10 to 14 V
      CANH (T39-7) - CANL (T39-10) R - W Multiplex communication line Ignition switch ON Pulse generation
      ENG+ (T39-14) - ENG- (T39-15) R - G ECM communication line Ignition switch ON Pulse generation
      TRC+ (T39-16) - TRC- (T39-17) Y - L ECM communication line Ignition switch ON Pulse generation
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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