Lexus IS250 · Service Manual BODY

TERMINALS OF ECU

System information


CHECK SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU)
B050671E17
  1. Disconnect the R6 ECU connector.

  2. Measure the resistance and voltage of the wire harness side connector.

    Symbols (Terminal No.)
    Wiring Color
    Terminal Description
    Condition
    Specified Condition
    B (R6-5) - E (R6-7)
    L - W-B
    +B Power supply
    Always
    10 to 14 V
    IG (R6-6) - E (R6-7)
    V - W-B
    Engine switch power supply
    Engine switch off
    Below 1 V
    IG (R6-6) - E (R6-7)
    V - W-B
    Engine switch power supply
    Engine switch on (IG)
    10 to 14 V
    E (R6-7) - Body ground
    W-B - Body ground
    Ground
    Always
    Below 1 Ω

  3. Reconnect the R6 ECU connector.

  4. B131069E01
    Measure the voltage of the connector.
    Switch Position
    Sliding Roof Position
    1
    Over stroke position
    2
    Slide fully open position (Comfort stop position)
    3
    Slide stop position [1]
    4
    Slide stop position [2]
    5
    Slide stop position [3]
    6
    Slide stop position [4]
    7
    Slide stop position [5]
    8
    Slide stop position [6]
    9
    Slide fully close position
    10
    Tilt fully open position
    11
    Auto fully closed, comfort stop position
    Symbols (Terminal No.)
    Wiring Color
    Terminal Description
    Condition
    Specified Condition
    CHK (R6-2) - E (R6-7)
    LG - W-B
    Sliding roof motor auto operation
    Engine switch on (IG), sliding roof switch pushed.
    10 to 14 V
    OPN (R6-9) - E (R6-7)
    B - W-B
    Sliding roof motor open
    Engine switch off, sliding roof switch position [1], [2], [3]
    Below 1 V
    OPN (R6-9) - E (R6-7)
    B - W-B
    Sliding roof motor open
    Engine switch on (IG), sliding roof switch position [1], [2], [3]
    10 to 14 V
    CLS (R6-8) - E (R6-7)
    SB - W-B
    Sliding roof motor close
    Engine switch off, sliding roof switch position [5], [6], [9], [10]
    Below 1 V
    CLS (R6-8) - E (R6-7)
    SB - W-B
    Sliding roof motor close
    Engine switch on (IG), sliding roof switch position [5], [6], [9], [10]
    10 to 14 V
    UP (R6-3) - E (R6-7)
    O - W-B
    Sliding roof motor up
    Engine switch off, sliding roof switch position [2], [3], [4], [5], [6], [7]
    Below 1 V
    UP (R6-3) - E (R6-7)
    O - W-B
    Sliding roof motor up
    Engine switch on (IG), sliding roof switch position [2], [3], [4], [5], [6], [7]
    10 to 14 V
    DWN (R6-4) - E (R6-7)
    Y - W-B
    Sliding roof motor down
    Engine switch off, sliding roof switch position [1], [2], [6], [7], [8], [9]
    Below 1 V
    DWN (R6-4) - E (R6-7)
    Y - W-B
    Sliding roof motor down
    Engine switch on (IG), sliding roof switch position [1], [2], [6], [7], [8], [9]
    10 to 14 V
    If the result is not as specified, the ECU may have a malfunction.

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