Lexus IS250 · Service Manual COMMUNICATION SYSTEM

TERMINALS OF ECU

System information

HINT:
This section describes the standard CAN values for all CAN related components.


CAN J/C (CAN LH J/C, CAN RH J/C)

HINT:
  1. The connectors connected to the CAN J/C can be distinguished by the colors of the bus lines and the connecting side of the junction connector.
  2. The connectors can be connected to any terminals on the same side.

  1. CAN LH J/C
    C123377E01

    Wiring color: 
    CAN LH J/C A Side (with Earth Terminal)
    		 Code
    		 Color (CANH Side)
    		 Color (CANL Side)
    Steering angle sensor
    		 J1
    		 P
    		 W
    ECM
    		 J2
    		 B
    		 W
    Seat belt control ECU
    		 J3
    		 V
    		 W
    Center airbag sensor
    		 J4
    		 R
    		 W
    Wiring color: 
    CAN LH J/C B Side (without Earth Terminal)
    		 Code
    		 Color (CANH Side)
    		 Color (CANL Side)
    Yaw rate sensor
    		 J5
    		 P
    		 W
    Skid control ECU
    		 J6
    		 R
    		 W
    CAN main bus line (bus line connecting CAN LH J/C and CAN RH J/C)
    		 J7
    		 B
    		 W
    DLC3
    		 J8
    		 G
    		 W
    Distance control ECU
    		 J9
    		 GR
    		 W

  2. CAN RH J/C
    C128122E01

    Wiring color: 
    CAN RH J/C A Side (with Earth Terminal)
    		 Code
    		 Color (CANH Side)
    		Color (CANL Side)
    CAN main bus line (bus line connecting CAN RH J/C and CAN LH J/C)
    		 J81
    		 B
    		 W
    Power steering ECU
    		 J82
    		 P
    		 W
    Television camera ECU
    		 J94
    		 L
    		 W
    Wiring color: 
    CAN RH J/C B Side (without Earth Terminal)
    		 Code
    		 Color (CANH Side)
    		Color (CANL Side)
    Gateway ECU
    		 J84
    		 B
    		 W

  3. G026205E01
    The terminals on connectors for the CAN J/C
    Terminal
    		 Terminal symbol
    1
    		 CANH
    2
    		 CANL

  4. Wiring diagram for identifying CAN J/C connectors.
    C128123E01


DLC3

  1. C126231E04
    Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Terminals
    		 Wiring Color
    		 Terminal Description
    		 Condition
    		Specified Condition
    J21-6 (CANH) - J21-14 (CANL)
    		 G - W
    		 HIGH-level CAN bus line - LOW-level CAN bus line
    		 Engine Switch off
    		 54 to 69 Ω
    J21-6 (CANH) - J21-4 (CG)
    		 G - W-B
    		 HIGH-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    J21-14 (CANL) - J21-4 (CG)
    		 W - W-B
    		 LOW-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    J21-6 (CANH) - J21-16 (BAT)
    		 G - L
    		 HIGH-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher
    J21-14 (CANL) - J21-16 (BAT)
    		 W - L
    		 LOW-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher


SKID CONTROL ECU WITH ACTUATOR (WITHOUT VDIM)

  1. E069126E32
    Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Terminals
    		 Wiring Color
    		 Terminal Description
    		 Condition
    		Specified Condition
    A14-11 (CANH) - A14-25 (CANL)
    		 B - R
    		 HIGH-level CAN bus line - LOW-level CAN bus line
    		 Engine Switch off
    		 54 to 69 Ω
    A14-11 (CANH) - A14-32 (GND1)
    		 B - W-B
    		 HIGH-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    A14-25 (CANL) - A14-32 (GND1)
    		 R - W-B
    		 LOW-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    A14-11 (CANH) - A14-31 (+BS)
    		 B - BR
    		 HIGH-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher
    A14-25 (CANL) - A14-31 (+BS)
    		 R - BR
    		 LOW-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher


STEERING ANGLE SENSOR

  1. G026357E13
    Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Terminals
    		 Wiring Color
    		 Terminal Description
    		 Condition
    		Specified Condition
    J23-10 (CANH) - J23-9 (CANL)
    		 P - W
    		 HIGH-level CAN bus line - LOW-level CAN bus line
    		 Engine Switch off
    		 54 to 69 Ω
    J23-10 (CANH) - J23-2 (ESS)
    		 P - W-B
    		 HIGH-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    J23-9 (CANL) - J23-2 (ESS)
    		 W - W-B
    		 LOW-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    J23-10 (CANH) - J23-3 (BAT)
    		 P - LG
    		 HIGH-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher
    J23-9 (CANL) - J23-3 (BAT)
    		 W - LG
    		 LOW-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher


YAW RATE SENSOR

  1. G026641E14
    Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Terminals
    		 Wiring Color
    		 Terminal Description
    		 Condition
    		Specified Condition
    J41-3 (CANH) - J41-2 (CANL)
    		 P - W
    		 HIGH-level CAN bus line - LOW-level CAN bus line
    		 Engine Switch off
    		 54 to 69 Ω
    J41-3 (CANH) - J41-1 (GND)
    		 P - W-B
    		 HIGH-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    J41-2 (CANL) - J41-1 (GND)
    		 W - W-B
    		 LOW-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    J41-3 (CANH) - J21-16 (BAT)
    		 P - L
    		 HIGH-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher
    J41-2 (CANL) - J21-16 (BAT)
    		 W - L
    		 LOW-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher


DISTANCE CONTROL ECU

  1. G031969E08
    Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Terminals
    		 Wiring Color
    		 Condition
    		Specified Condition
    J17-8 (CANH) - J17-9 (CANL)
    		 GR - W
    		 Engine Switch off
    		 54 to 69 Ω
    J17-8 (CANH) - J17-12 (GND)
    		 GR - BR
    		 Engine Switch off
    		 1 kΩ or higher
    J17-9 (CANL) - J17-12 (GND)
    		 W - BR
    		 Engine Switch off
    		 1 kΩ or higher
    J17-8 (CANH) - J21-16 (BAT)
    		 GR - L
    		 Engine Switch off
    		 1 kΩ or higher
    J17-9 (CANL) - J21-16 (BAT)
    		 W - L
    		 Engine Switch off
    		 1 kΩ or higher


SEAT BELT CONTROL ECU

  1. C110546E05
    Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Terminals
    		 Wiring Color
    		 Terminal Description
    		 Condition
    		Specified Condition
    Q38-4 (CANH) - Q38-6 (CANL)
    		 B - W
    		 HIGH-level CAN bus line - LOW-level CAN bus line
    		 Engine Switch off
    		 54 to 69 Ω
    Q38-4 (CANH) - Q38-18 (PGND)
    		 B - W-B
    		 HIGH-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    Q38-6 (CANL) - Q38-18 (PGND)
    		 W - W-B
    		 LOW-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    Q38-4 (CANH) - Q38-9 (+B)
    		 B - W
    		 HIGH-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher
    Q38-6 (CANL) - Q38-9 (+B)
    		 W - W
    		 LOW-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher


TELEVISION CAMERA ECU

  1. G031970E08
    Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Terminals
    		 Wiring Color
    		 Terminal Description
    		 Condition
    		Specified Condition
    J92-7 (CANH) - J92-6 (CANL)
    		 L - W
    		 HIGH-level CAN bus line - LOW-level CAN bus line
    		 Engine Switch off
    		 54 to 69 Ω
    J92-7 (CANH) - J93-8 (GND1)
    		 L - W-B
    		 HIGH-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    J92-6 (CANL) - J93-8 (GND1)
    		 W - W-B
    		 LOW-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    J92-7 (CANH) - J93-1 (+B)
    		 L - R
    		 HIGH-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher
    J92-6 (CANL) - J93-1 (+B)
    		 W - R
    		 LOW-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher


POWER STEERING ECU

  1. C121570E01
    Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Terminals
    		 Wiring Color
    		 Terminal Description
    		 Condition
    		Specified Condition
    A31-2 (CANH) - A31-3 (CANL)
    		 B - R
    		 HIGH-level CAN bus line - LOW-level CAN bus line
    		 Engine Switch off
    		 54 to 69 Ω
    A31-2 (CANH) - A31-5 (PGND)
    		 B - B
    		HIGH-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    A31-3 (CANL) - A31-5 (PGND)
    		 R - B
    		 LOW-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    A31-2 (CANH) - A31-4 (PIG)
    		 B - R
    		 HIGH-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher
    A31-3 (CANL) - A31-4 (PIG)
    		 R - R
    		 LOW-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher


CENTER AIRBAG SENSOR

  1. C125063E02
    Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Terminals
    		 Wiring Color
    		 Terminal Description
    		 Condition
    		Specified Condition
    J47-13 (CANH) - J47-22 (CANL)
    		 R - W
    		 HIGH-level CAN bus line - LOW-level CAN bus line
    		 Engine Switch off
    		 54 to 69 Ω
    J47-13 (CANH) - J47-25 (E1)
    		 R - W-B
    		 HIGH-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    J47-22 (CANL) - J47-25 (E1)
    		 W - W-B
    		 LOW-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    J47-13 (CANH) - J21-16 (BAT)
    		 R - L
    		 HIGH-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher
    J47-22 (CANL) - J21-16 (BAT)
    		 W - L
    		 LOW-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher


ECM

  1. Measure the resistance according to the value(s) in the table below.
    A103802E15

    Standard resistance:
    Terminals
    		 Condition
    		Specified Condition
    A5-25 (CANH) - A5-24 (CANL)
    		 Engine Switch off
    		 108 to 132 Ω

  2. C125066E02
    Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Terminals
    		 Wiring Color
    		 Terminal Description
    		 Condition
    		Specified Condition
    A5-25 (CANH) - A5-24 (CANL)
    		 B - W
    		 HIGH-level CAN bus line - LOW-level CAN bus line
    		 Engine Switch off
    		 108 to 132 Ω
    A5-25 (CANH) - A5-2 (EC)
    		 B - W-B
    		 HIGH-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    A5-24 (CANL) - A5-2 (EC)
    		 W - W-B
    		 LOW-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    A5-25 (CANH) - A5-4 (BATT)
    		 B - L
    		 HIGH-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher
    A5-24 (CANL) - A5-4 (BATT)
    		 W - L
    		 LOW-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher


GATEWAY ECU

  1. Measure the resistance according to the value(s) in the table below.
    E108405E10

    Standard resistance:
    Terminals
    		 Condition
    		Specified Condition
    J76-17 (CA1H) - J76-18 (CA1L)
    		 Engine Switch off
    		 108 to 132 Ω

  2. G031972E13
    Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Terminals
    		 Wiring Color
    		 Terminal Description
    		 Condition
    		Specified Condition
    J76-17 (CA1H) - J76-18 (CA1L)
    		 B - W
    		 HIGH-level CAN bus line - LOW-level CAN bus line
    		 Engine Switch off
    		 108 to 132 Ω
    J76-17 (CA1H) - J76-24 (GND)
    		 B - W-B
    		 HIGH-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    J76-18 (CA1L) - J76-24 (GND)
    		 W - W-B
    		 LOW-level CAN bus line - Ground
    		 Engine Switch off
    		 1 kΩ or higher
    J76-17 (CA1H) - J76-10 (BATT)
    		 B - LG
    		 HIGH-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher
    J76-18 (CA1L) - J76-10 (BATT)
    		 W - LG
    		 LOW-level CAN bus line - Battery positive
    		 Engine Switch off
    		 1 kΩ or higher

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