LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2008 >> GS 460 >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Multiplex Communication >> Multiplex Communication System >> Terminals Of Ecu

Terminals Of Ecu

  1. CHECK NETWORK GATEWAY ECU 
    Fig 1: Identifying K66 Network Gateway ECU Connector Terminals
    G05812748Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the K66 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      BATT (K66-10) - GND (K66 24) G - W-B +B (BATT) power supply Always 10 to 14 V
      IG (K66-1) - Body ground B - Body ground Ignition power supply Engine switch on (IG) 10 to 14 V
      ACC (K66-2) - Body ground V - Body ground ACC power supply Engine switch on (ACC) 10 to 14 V
      SIL (K66-7) - Body ground O - Body ground Bus "+" line During transmission Pulse generation
      MPI1 (K66-4) - Body ground LG - Body ground MPX line Always 10 kΩ or higher
      MPI2 (K66-13) - Body ground GR - Body ground MPX line Always 10 kΩ or higher
      MPL1 (K66-5) - Body ground W - Body ground MPX line Always 10 kΩ or higher
      MPL2 (K66-14) - Body ground GR - Body ground MPX line Always 10 kΩ or higher
      MPD1 (K66-3) - Body ground P - Body ground MPX line Always 10 kΩ or higher
      MPD2 (K66-12) - Body ground SB - Body ground MPX line Always 10 kΩ or higher
      GND (K66-24) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  2. CHECK ENGINE ROOM NO. 2 RELAY BLOCK (FRONT CONTROLLER) 
    Fig 2: Identifying 2E And 2F Junction Block Connectors
    G05301168Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the 2E and 2F junction block connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      FMB3 (2E-4) - E (2F-1) G-R - W-B +B (FMB3) power supply Always 10 to 14 V
      MPX1 (2F-5) - E (2F-1) GR - W-B MPX line Always 10 kΩ or higher
      MPX2 (2F-6) - E (2F-1) GR-L - W-B MPX line Always 10 kΩ or higher
      E (2F-1) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  3. CHECK COWL SIDE JUNCTION BLOCK LH (COWL SIDE JUNCTION BLOCK ECU LH) 
    Fig 3: Identifying Cowl Side Junction Block Connectors - LH
    G05301169Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the PA, PD and PL junction block connectors.
    2. Disconnect the D3 and D5 EDU connectors.
    3. Measure the resistance and voltage of the wire harness side connectors.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      MPXB (PL-1) - GND (PA-14) G-R - W-B +B (MPX-B) power supply Always 10 to 14 V
      MPX1 (V3-15) - Body ground GR - Body ground MPX line Always 10 kΩ or higher
      MPX4 (A30-6) - Body ground G-R - Body ground *1
      GR-L - Body ground *2      		 MPX line Always 10 kΩ or higher
      GND (PA-14) - Body ground W-B - Body ground Ground Always Below 1 Ω
      SGND (PD-8) - Body ground W-B - Body ground Ground Always Below 1 Ω
      HINT:
      *1: for LHD
      *2: for RHD

      If the result is not as specified, there may be a malfunction on the wire harness side.

  4. CHECK COWL SIDE JUNCTION BLOCK RH (MULTIPLEX NETWORK BODY ECU) 
    Fig 4: Identifying Cowl Side Junction Block Connectors - RH
    G05301170Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the DA, DD and DK junction block connectors.
    2. Disconnect the K68 ECU connector.
    3. Measure the resistance and voltage of the wire harness side connectors.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      BECU (DK-5) - GND2 (DD-7) G-R - W-B +B (MPX-B) power supply Always 10 to 14 V
      MPX1 (DA-26) - GND2 (DD-7) GR - W-B MPX line Always 10 kΩ or higher
      MPX2 (K68-21) - GND2 (DD-7) G - W-B MPX line Always 10 kΩ or higher
      GSW (DA-7) - GND2 (DD-7) B - W-B MPX line Always 10 kΩ or higher
      GND2 (DD-7) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  5. CHECK NO. 1 JUNCTION BLOCK ASSEMBLY (MULTIPLEX NETWORK REAR ECU) 
    Fig 5: Identifying LB, LC And LF Junction Block Connectors
    G05301171Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the LB, LC and LF junction block connectors.
    2. Measure the resistance and voltage of the wire harness side connectors.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      RP+B (LB-1) - Body ground B - Body ground +B (MPX-B) power supply Always 10 to 14 V
      MPX1 (LC-21) - Body ground BR - Body ground MPX line Always 10 kΩ or higher
      MPX2 (LC-31) - Body ground) GR - Body ground MPX line Always 10 kΩ or higher
      PGND (LF-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      SG (LC-3) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  6. CHECK MULTIPLEX NETWORK DOOR ECU FRONT LH (DRIVER SIDE DOOR ECU) 
    Fig 6: Identifying M9 ECU Connector Terminals
    G05812753Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the M9 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CPUB (M9-4) - Body ground LG - Body ground +B (CPUB) power supply Always 10 to 14 V
      BDR (M9-6) - Body ground L - Body ground +B (BDR) power supply Always 10 to 14 V
      MPX1 (M9-8) - Body ground P - Body ground MPX line Always 10 kΩ or higher
      MPX2 (M9-9) - Body ground L - Body ground MPX line Always 10 kΩ or higher
      GND (M9-1) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  7. CHECK MULTIPLEX NETWORK DOOR ECU FRONT RH (FRONT PASSENGER SIDE DOOR ECU) 
    Fig 7: Identifying M4 ECU Connector Terminals
    G05301173Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the M4 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CPUB (M4-4) - Body ground LG - Body ground +B (CPUB) power supply Always 10 to 14 V
      BDR (M4-6) - Body ground L - Body ground +B (BDR) power supply Always 10 to 14 V
      MPX1 (M4-8) - Body ground GR - Body ground MPX line Always 10 kΩ or higher
      MPX2 (M4-9) - Body ground P - Body ground MPX line Always 10 kΩ or higher
      GND (M4-1) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  8. CHECK MULTIPLEX NETWORK DOOR ECU REAR LH (REAR DOOR LH) 
    Fig 8: Identifying O7 ECU Connector Terminals
    G05812755Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the O7 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CPUB (O7-4) - Body ground BR - Body ground +B (CPUB) power supply Always 10 to 14 V
      BDR (O7-6) - Body ground L - Body ground +B (BDR) power supply Always 10 to 14 V
      MPX1 (O7-8) - Body ground GR - Body ground MPX line Always 10 kΩ or higher
      MPX2 (O7-9) - Body ground P - Body ground MPX line Always 10 kΩ or higher
      GND (O7-1) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  9. CHECK MULTIPLEX NETWORK DOOR ECU REAR RH (REAR DOOR RH) 
    Fig 9: Identifying O3 ECU Connector Terminals
    G05301175Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the O3 ECU connector.
    2. Measure the voltage the resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CPUB (O3-4) - Body ground G - Body ground +B (CPUB) power supply Always 10 to 14 V
      BDR (O3-6) - Body ground L - Body ground +B (BDR) power supply Always 10 to 14 V
      MPX1 (O3-8) - Body ground GR - Body ground MPX line Always 10 kΩ or higher
      MPX2 (O3-9) - Body ground P - Body ground MPX line Always 10 kΩ or higher
      GND (O3-1) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  10. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SIDE) 
    Fig 10: Identifying b7 And b8 ECU Connector Terminals
    G05301176Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the b7 and b8 ECU connectors.
    2. Measure the voltage and the resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      +B (b8-5) - GND (b8-1) L - W-B +B (+B) power supply Always 10 to 14 V
      SYSB (b7-8) - Body ground G - Body ground +B (SYSB) power supply Always 10 to 14 V
      MPX1 (b7-1) - Body ground GR - Body ground MPX line Always 10 kΩ or higher
      GND (b8-1) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  11. CHECK NO. 2 AIR CONDITIONING AMPLIFIER ASSEMBLY (A/C ECU) 
    Fig 11: Identifying No. 2 Air Conditioning Amplifier Connector Terminals
    G05812758Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the K52 amplifier connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      B (K52-1) - GND (K52-20) L - W-B +B power supply Always 10 to 14 V
      IG+ (K52-21) - Body ground W - Body ground Engine switch signal (IG) Engine switch on (IG) 10 to 14 V
      MPX+ (K52-30) - Body ground SB - Body ground MPX line Always 10 kΩ or higher
      MPX-(K52-31) - Body ground Y - Body ground MPX line Always 10 kΩ or higher
      GND (K52-20) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  12. CHECK AIRBAG SENSOR ASSEMBLY CENTER 
    Fig 12: Identifying K44 Air Bag Sensor Connector Terminals
    G05301178Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the K44 sensor connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG2 (K44-21) - E1 (A18-25) B - W-B Engine switch signal (IG) Engine switch on (IG) 10 to 14 V
      MPX1 (K44-13) - Body ground R - Body ground MPX line Always 10 kΩ or higher
      MPX2 (K44-22) - Body ground R - Body ground MPX line Always 10 kΩ or higher
      E1 (K44-25) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E2 (K44-26) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  13. CHECK COMBINATION METER ASSEMBLY (METER ECU) 
    Fig 13: Identifying K31 Combination Meter Connector Terminals
    G05301179Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the K31 meter connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      B (K31-21) - Body ground P - Body ground +B (B) power supply Always 10 to 14 V
      B (K31-22) - Body ground L - Body ground +B (B) power supply Always 10 to 14 V
      MPX+ (k31-25) - Body ground GR - Body ground MPX line Always 10 kΩ or higher
      MPX- (K31-5) - Body ground SB - Body ground MPX line Always 10 kΩ or higher
      E2 (K31-40) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  14. CHECK SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF CONTROL ECU) 
    Fig 14: Identifying W7 Driver Gear Connector Terminals
    G05301180Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the W7 driver gear connector.
    2. Measure the voltage and the resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      B (W7-5) - E (W7-7) L - W-B +B (B) power supply Always 10 to 14 V
      MPX1 (W7-10) - Body ground GR - Body ground MPX line Always 10 kΩ or higher
      E (W7-7) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  15. CHECK MULTIPLEX TILT AND TELESCOPIC ECU 
    Fig 15: Identifying K27 Multiplex Tilt And Telescopic ECU Connector Terminals
    G05301181Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the K27 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      ECUB (K27-9) - GND (K27-11) R - W-B +B (ECUB) power supply Always 11 to 14 V
      +B (K27-2) - GND (K27-11) L - W-B +B (+B) power supply Always 11 to 14 V
      MPX1 (K27-5) - Body ground GR - Body ground MPX line Always 10 kΩ or higher
      E (K27-11) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  16. CHECK COMBINATION SWITCH ASSEMBLY (WINDSHIELD WIPER SWITCH) 
    Fig 16: Identifying K22 Combination Switch Connector Terminals
    G05301182Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the K22 switch connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
      B (K22-1) - E (K22-5) GR - W-B +B (B) power supply Always 10 to 14 V
      MPX1 (K22-6) - Body ground G - Body ground MPX line Always 10 kΩ or higher
      MPX2 (K22-7) - Body ground O - Body ground MPX line Always 10 kΩ or higher
      E (K22-5) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  17. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY 
    Fig 17: Identifying Q13 Multiplex Network Master Switch Connector Terminals
    G05812764Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the Q13 switch connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CPUB (Q13-9) - E (Q13-12) P - W-B +B (CPUB) power supply Always 10 to 14 V
      E (Q13-12) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPX1 (Q13-3) - E (Q13-12) GR - W-B MPX line Always Below 1 Ω
      MPX2 (Q13-2) - E (Q13-12) P - W-B MPX line Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  18. CHECK POWER SOURCE CONTROL ECU 
    Fig 18: Identifying K73 Power Source Control ECU Connector Terminals
    G05301184Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the K73 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AM1 (K73-33) - GND2 (K73-6) O - W-B +B power supply Always 10 to 14 V
      AM2 (K73-12) - GND2 (K73-6) BR - W-B +B power supply Always 10 to 14 V
      MPX1 (K73-7) - Body ground LG - Body ground MPX line Always 10 kΩ or higher
      GND2 (K73-6) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  19. CHECK CERTIFICATION ECU 
    Fig 19: Identifying U28 ECU Connector Terminals
    G05301185Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the U28 ECU connector.
    2. Measure the resistance and voltage of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      +B1 (U28-1) - E (U28-17) R - W-B B power supply Always 10 to 14 V
      MPX1 (U28-27) - E (U28-17) BR - W-B MPX line Always 10 kΩ or higher
      MPX2 (U28-28) - E (U28-17) GR - W-B MPX line Always 10 kΩ or higher
      E (U28-17) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  20. CHECK TIRE PRESSURE WARNING ECU 
    Fig 20: Identifying K45 Tire Pressure Warning ECU Connector Terminals
    G05812767Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the K45 ECU connector.
    2. Measure the resistance and voltage of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IG (K45-1) - GND (K45-7) G - W-B Power supply Always 10 to 14 V
      MPX1 (K45-6) - GND (K45-7) GR - W-B MPX line Always 10 kΩ or higher
      MPX2 (K45-12) - GND (K45-7) LG - W-B MPX line Always 10 kΩ or higher
      GND (K45-7) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

  21. CHECK MAYDAY ECU 
    Fig 21: Identifying U45 Mayday ECU Connector Terminals
    G05301187Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the U45 ECU connector.
    2. Check the voltage and resistance of each terminal of the wire harness side connector.
      VOLTAGE AND RESISTANCE SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      +B (U45-1) - Body ground GR - Body ground Power supply Always 10 to 14 V
      E (U45-12) - Body ground W-B - Body ground Ground Always Below 1 Ω
      MPX1 (U45-23) - Body ground GR - Body ground MPX line Always 10 kΩ or higher

      If the result is not as specified, there may be a malfunction on the wire harness side.

scientia non olet · About LEMON Manuals