LEMON Manuals: Even more car manuals for everyone
Home >> Infiniti >> 2008 >> M45 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 120 (Can Communication System) >> Can Communication System >> Terminals Of Ecu

Terminals Of Ecu

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.
      CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
      NOTE:
      • Before measuring the resistance, leave the vehicle for at least 1 minute and do not operate the ignition switch, any switches or doors. If doors need to be opened in order to check connectors, open the doors and leave them open.
      • After the ignition switch is turned OFF, the navigation system requires approximately 90 seconds to record various types of memory and settings. As a result, after turning the ignition switch OFF, wait 90 seconds or more before disconnecting the cable from the negative (-) battery terminal.
  2. JUNCTION CONNECTOR 
    1. NO. 1 JUNCTION CONNECTOR
      Fig 1: Identifying No. 1 Junction Connector
      G05163389Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Wiring color 

      CONNECTOR TERMINAL WIRING COLOR REFERENCE TABLE

      Junction Connector A Side Color (CANH Side) Color (CANL Side)
      Combination meter ECU (J84)*1 SB W
      Center airbag sensor (J83) BR W
      Skid control ECU with actuator (A46) B W
      HINT:
      • *1: for V bus
      • The connectors connected to the junction connector can be distinguished by the colors of the bus lines and the connecting side of the connector.
      • The connectors can be connected to any terminals on the same side.

      Wiring color 

      CONNECTOR TERMINAL WIRING COLOR REFERENCE TABLE

      Junction Connector B Side Color (CANH Side) Color (CANL Side)
      DLC3 (J86) V W
      Main body ECU (J96)*1 L W
      No. 2 junction connector (J94) R W
      Steering angle sensor (J87) G W
      HINT:
      • *1: for V bus
      • The connectors connected to the junction connector can be distinguished by the colors of the bus lines and the connecting side of the connector.
      • The connectors can be connected to any terminals on the same side.
    2. NO. 2 JUNCTION CONNECTOR
      Fig 2: Identifying No. 2 Junction Connector
      G05163390Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Wiring color 

      CONNECTOR TERMINAL WIRING COLOR REFERENCE TABLE

      Junction Connector B Side Color (CANH Side) Color (CANL Side)
      Bus buffer ECU (J98)*1 P W
      No. 1 junction connector (J93) R W
      ECM (J92) GR W
      4WD control ECU (J88)*2 O W
      Air conditioning amplifier (J85) B W
      HINT:
      • *1: w/ Bus Buffer ECU
      • *2: w/ 4WD
      • The connectors connected to the junction connector can be distinguished by the colors of the bus lines and the connecting side of the connector.
      • The connectors can be connected to any terminals on the same side.
    3. NO. 3 JUNCTION CONNECTOR
      Fig 3: Identifying No. 3 Junction Connector
      G05163391Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Wiring color 

      CONNECTOR TERMINAL WIRING COLOR REFERENCE TABLE

      Junction Connector A Side Color (CANH Side) Color (CANL Side)
      Front power seat control ECU and switch LH (J90)*1 GR W
      Multiplex tilt and telescopic ECU (J89)*1 O w
      Main body ECU (J97)*2 B W
      Combination meter ECU (J95)*2 Y W
      HINT:
      • *1: w/ Seat Memory
      • *2: for MS bus
      • The connectors connected to the junction connector can be distinguished by the colors of the bus lines and the connecting side of the connector.
      • The connectors can be connected to any terminals on the same side.

      Wiring color 

      CONNECTOR TERMINAL WIRING COLOR REFERENCE TABLE

      Junction Connector B Side Color (CANH Side) Color (CANL Side)
      Outer mirror control ECU (J91)*1 LG W
      HINT:
      • *1: w/ Seat Memory
      • *2: for MS bus
      • The connectors connected to the junction connector can be distinguished by the colors of the bus lines and the connecting side of the connector.
      • The connectors can be connected to any terminals on the same side.
  3. TERMINALS OF CONNECTORS FOR JUNCTION CONNECTOR (JUNCTION CONNECTOR) 
    CONNECTOR TERMINAL REFERENCE TABLE

    Terminal Terminal Symbol
    1 CANH
    2 CANL
    Fig 4: Identifying CANH And CANL Connector Terminals
    G04953343Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CHECK DLC3 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 5: Identifying DLC3 Connector Terminals
      G05163393Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      CONNECTOR TERMINAL REFERENCE TABLE

      Symbols (Terminal No.) Wiring Color Switch Condition Specified Condition
      J17-6 (CANH) - J17-14 (CANL) V - W Ignition switch OFF 54 to 69 Ω
      J17-6 (CANH) - J17-4 (CG) V - W-B Ignition switch OFF 200 Ω or higher
      J17-14 (CANL) - J17-4 (CG) W - W-B Ignition switch OFF 200 Ω or higher
      J17-6 (CANH) - J17-16 (BAT) V - P Ignition switch OFF 6 kΩ or higher
      J17-14 (CANL) - J17-16 (BAT) W-P Ignition switch OFF 6 kΩ or higher
  5. CHECK SKID CONTROL ECU WITH ACTUATOR 
    Fig 6: Identifying Skid Control ECU Connector Terminals
    G05163394Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A17 ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE TABLE

      Terminal No. (Symbols) Wiring Color Switch Condition Specified Condition
      A17-5 (CANH) - A17-4 (CANL) B - W Ignition switch OFF 54 to 69 Ω
      A17-5 (CANH) - A17-1 (GND1) B - W-B Ignition switch OFF 200 Ω or higher
      A17-4 (CANL) - A17-1 (GND1) W - W-B Ignition switch OFF 200 Ω or higher
      A17-5 (CANH) - A17-16 (+BM) B - L Ignition switch OFF 6 kΩ or higher
      A17-4 (CANL) - A17-16 (+BM) W - L Ignition switch OFF 6 kΩ or higher
  6. CHECK MAIN BODY ECU 
    Fig 7: Identifying Main Body ECU Connector Terminals
    G05160738Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J2, DB and DD ECU connectors.
    2. Measure the resistance according to the value(s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE TABLE

      Terminal No. (Symbols) Wiring Color Switch Condition Specified Condition
      J2-5 (CANH) - J2-6 (CANL)*1 L - W Ignition switch OFF 54 to 69 Ω
      J2-5 (CANH) - DD-62 (GND1)*1 L - W-B Ignition switch OFF 200 Ω or higher
      J2-6 (CANL) - DD-62 (GND1)*1 W - W-B Ignition switch OFF 200 Ω or higher
      J2-5 (CANH) - DB-13 (BECU)*1 L - GR Ignition switch OFF 6 kΩ or higher
      J2-6 (CANL) - DB-13 (BECU)*1 W - GR Ignition switch OFF 6 kΩ or higher
      J2-16 (CANP) - J2-15 (CANN)*2 B - W Ignition switch OFF 108 to 132 Ω
      J2-16 (CANP) - DD-62 (GND1)*2 B - W-B Ignition switch OFF 200 Ω or higher
      J2-15 (CANN) - DD-62 (GND1)*2 W - W-B Ignition switch OFF 200 Ω or higher
      J2-16 (CANP) - DB-13 (BECU)*2 B - GR Ignition switch OFF 6 kΩ or higher
      J2-15 (CANN) - DB-13 (BECU)*2 W - GR Ignition switch OFF 6 kΩ or higher
      HINT:
      • *1: for V bus
      • *2: for MS bus
  7. CHECK ECM 
    Fig 8: Identifying A24 And D74 ECM Connector Terminals
    G05163396Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A24 and D74 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE TABLE

      Terminal No. (Symbols) Wiring Color Switch Condition Specified Condition
      A24-10 (CANH) - A24-11 (CANL) GR - W Ignition switch OFF 108 to 132 Ω
      A24-10 (CANH) - D74-81 (E1) GR - BR Ignition switch OFF 200 Ω or higher
      A24-11 (CANL) - D74-81 (E1) W - BR Ignition switch OFF 200 Ω or higher
      A24-10 (CANH) - A24-3 (+B) GR - GR Ignition switch OFF 6 kΩ or higher
      A24-11 (CANL) - A24-3 (+B) W - GR Ignition switch OFF 6 kΩ or higher
  8. CHECK AIR CONDITIONING AMPLIFIER 
    Fig 9: Identifying J19 ECU Connector Terminals
    G05163397Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J19 ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE TABLE

      Terminal No. (Symbols) Wiring Color Switch Condition Specified Condition
      J19-11 (CANH) - J19-12 (CANL) B - W Ignition switch OFF 54 to 69 Ω
      J19-11 (CANH) - J19-14 (GND) B - W-B Ignition switch OFF 200 Ω or higher
      J19-12 (CANL) - J19-14 (GND) W - W-B Ignition switch OFF 200 Ω or higher
      J19-11 (CANH) - J19-21 (B) B - R Ignition switch OFF 6 kΩ or higher
      J19-12 (CANL) - J19-21 (B) W - R Ignition switch OFF 6 kΩ or higher
  9. CHECK CENTER AIRBAG SENSOR 
    Fig 10: Identifying J46 ECU And J17 Connector Terminals
    G05163398Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J46 ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE TABLE

      Terminal No. (Symbols) Wiring Color Switch Condition Specified Condition
      J46-13 (CANH) - J46-22 (CANL) BR - W Ignition switch OFF 54 to 69 Ω
      J46-13 (CANH) - J46-25 (E1) BR - W-B Ignition switch OFF 200 Ω or higher
      J46-22 (CANL) - J46-25 (E1) W - W-B Ignition switch OFF 200 Ω or higher
      J46-13 (CANH) - J17-16 (BAT) BR - P Ignition switch OFF 6 kΩ or higher
      J46-22 (CANL) - J17-16 (BAT) W - P Ignition switch OFF 6 kΩ or higher
  10. CHECK COMBINATION METER ECU 
    Fig 11: Identifying J28 ECU Connector Terminals
    G05163399Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J28 ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE

      Terminal No. (Symbols) Wiring Color Switch Condition Specified Condition
      J28-33 (CANH) - J28-34 (CANL)*1 SB - W Ignition switch OFF 108 to 132 Ω
      J28-33 (CANH) - J28-40 (E1)*1 SB - W-B Ignition switch OFF 200 Ω or higher
      J28-34 (CANL) - J28-40 (E1)*1 W - W-B Ignition switch OFF 200 Ω or higher
      J28-33 (CANH) - J28-18 (B)*1 SB - LG Ignition switch OFF 6 kΩ or higher
      J28-34 (CANL) - J28-18 (B)*1 W - LG Ignition switch OFF 6 kΩ or higher
      J28-22 (CANH) - J28-21 (CANL)*2 Y - W Ignition switch OFF 108 to 132 Ω
      J28-22 (CANH) - J28-40 (E1)*2 Y - W-B Ignition switch OFF 200 Ω or higher
      J28-21 (CANL) - J28-40 (E1)*2 W - W-B Ignition switch OFF 200 Ω or higher
      J28-22 (CANH) - J28-18 (B)*2 Y - LG Ignition switch OFF 6 kΩ or higher
      J28-21 (CANL) - J28-18 (B)*2 W - LG Ignition switch OFF 6 kΩ or higher
      HINT:
      • *1: for V bus
      • *2: for MS bus
  11. CHECK STEERING ANGLE SENSOR 
    Fig 12: Identifying J6 Steering Angle Sensor Connector
    G05163400Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J6 sensor connector.
    2. Measure the resistance according to the value(s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE TABLE

      Terminal No. (Symbols) Wiring Color Switch Condition Specified Condition
      J6-10 (CANH) - J6-9 (CANL) G - W Ignition switch OFF 54 to 69 Ω
      J6-10 (CANH) - J6-2 (ESS) G - W-B Ignition switch OFF 200 Ω or higher
      J6-9 (CANL) - J6-2 (ESS) W - W-B Ignition switch OFF 200 Ω or higher
      J6-10 (CANH) - J6-3 (BAT) G - R Ignition switch OFF 6 kΩ or higher
      J6-9 (CANL) - J6-3 (BAT) W - R Ignition switch OFF 6 kΩ or higher
  12. CHECK 4WD CONTROL ECU 

    HINT:

    For vehicle with 4 wheel drive only.

    Fig 13: Identifying A25, A26 & J17 ECU Connector Terminals
    G05163401Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A25 and A26 ECU connectors.
    2. Measure the resistance according to the value(s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE TABLE

      Terminal No. (Symbols) Wiring Color Switch Condition Specified Condition
      A25-19 (CANH) - A25-20 (CANL) O - W Ignition switch OFF 54 to 69 Ω
      A25-19 (CANH) - A26-4 (GND) O - W-B Ignition switch OFF 200 Ω or higher
      A25-20 (CANL) - A26-4 (GND) W - W-B Ignition switch OFF 200 Ω or higher
      A25-19 (CANH) - J17-16 (BAT) O - P Ignition switch OFF 6 kΩ or higher
      A25-20 (CANL) - J17-16 (BAT) W - P Ignition switch OFF 6 kΩ or higher
  13. CHECK BUS BUFFER ECU 

    HINT:

    For vehicle with bus buffer ECU only.

    1. Disconnect the J59 ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 14: Identifying J59 ECU Connector Terminals
      G05163402Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      CONNECTOR TERMINAL WIRING COLOR REFERENCE TABLE

      Terminal No. (Symbols) Wiring Color Switch Condition Specified Condition
      J59-3 (CAN+) - J59-2 (CAN-) P - W Ignition switch OFF 54 to 69 Ω
  14. CHECK FRONT POWER SEAT CONTROL ECU AND SWITCH LH 

    HINT:

    For vehicle with front power seat control system (w/ Seat memory) only.

    Fig 15: Identifying Z9 And Z10 ECU Connector Terminals
    G05163403Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the Z9 and Z10 ECU connectors.
    2. Measure the resistance according to the value(s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE TABLE

      Terminal No. (Symbols) Wiring Color Switch Condition Specified Condition
      Z10-5 (CANH) - Z10-1 (CANL) GR - W Ignition switch OFF 54 to 69 Ω
      Z10-5 (CANH) - Z9-1 (GND) GR - W-B Ignition switch OFF 200 Ω or higher
      Z10-1 (CANL) - Z9-1 (GND) W - W-B Ignition switch OFF 200 Ω or higher
      Z10-5 (CANH) - Z9-5 (+B) GR - L Ignition switch OFF 6 kΩ or higher
      Z10-1 (CANL) - Z9-5 (+B) W - L Ignition switch OFF 6 kΩ or higher
  15. CHECK OUTER MIRROR CONTROL ECU 

    HINT:

    For vehicle with front power seat control system (w/ Seat memory) only.

    Fig 16: Identifying N7 And N8 ECU Connector Terminals
    G05163404Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N7 and N8 ECU connectors.
    2. Measure the resistance according to the value(s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE TABLE

      Terminal No. (Symbols) Wiring Color Switch Condition Specified Condition
      N8-1 (CAN) - N8-21 (CGND) LG - W Ignition switch OFF 54 to 69 Ω
      N8-11 (CAN) - N7-9 (GND) LG - W-B Ignition switch OFF 200 Ω or higher
      N8-21 (CGND) - N7-9 (GND) W - W-B Ignition switch OFF 200 Ω or higher
      N8-1 (CAN) - N7-3 (B) LG - R Ignition switch OFF 6 kΩ or higher
      N8-21 (CGND) - N7-3 (B) W - R Ignition switch OFF 6 kΩ or higher
  16. CHECK MULTIPLEX TILT AND TELESCOPIC ECU 

    HINT:

    For vehicle with front power seat control system (w/ Seat memory) only.

    Fig 17: Identifying J47 ECU Connector Terminals
    G05163405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J47 ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      CONNECTOR TERMINAL WIRING COLOR REFERENCE TABLE

      Terminal No. (Symbols) Wiring Color Switch Condition Specified Condition
      J47-5 (CANH) - J47-14 (CANL) O - W Ignition switch OFF 54 to 69 Ω
      J47-5 (CANH) - J47-11 (GND) O - W-B Ignition switch OFF 200 Ω or higher
      J47-14 (CANL) - J47-11 (GND) W - W-B Ignition switch OFF 200 Ω or higher
      J47-5 (CANH) - J47-2 (+B) O - V Ignition switch OFF 6 kΩ or higher
      J47-14 (CANL) - J47-2 (+B) W - V Ignition switch OFF 6 kΩ or higher
scientia non olet · About LEMON Manuals