POWER BACK DOOR SYSTEM > TERMINALS OF ECU

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CHECK POWER BACK DOOR ECU


  1. Disconnect the P10 and P11 connectors from power back door ECU.


    B068464E04

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

    Standard resistance:

    Symbols
    (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    BDDN (P10-4) - Body ground
    		W - Body ground
    		Power back door closer switch signal input
    		Power back door closer switch
    OFF → ON
    		10 kΩ or higher →
    Below 1 Ω
    MSE (P10-5) - MSW (P10-6)
    		W-B - G
    		Power back door main switch signal circuit
    		Power back door main switch
    OFF → ON
    		10 kΩ or higher →
    Below 1 Ω
    CTYE (P10-7) - Body ground
    		P - Body ground
    		Back door courtesy switch signal input
    		Back door is closed → opened
    		10 kΩ or higher →
    Below 1 Ω
    OSL (P10-14) - OSE (P10-15)
    		G - Y
    		Power back door touch sensor LH circuit
    		Back door touch sensor LH not
    pressed → pressed
    		Approx. 1 kΩ →
    Below 100 Ω
    OSR (P10-16) - OSE (P10-15)
    		L - Y
    		Power back door touch sensor RH circuit
    		Back door touch sensor RH not
    pressed → pressed
    		Approx. 1 kΩ →
    Below 100 Ω
    CTYO (P10-19) - Body ground
    		BR - Body ground
    		Back door courtesy switch signal output
    		Back door is closed → opened
    		10 kΩ or higher →
    Below 1 Ω
    GND (P11-8) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω

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

  3. Measure the voltage according to the value(s) in the table below.

    Standard voltage:

    Symbols
    (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    IG (P10-9) - Body ground
    		GR - Body ground
    		Ignition switch input
    		Ignition switch OFF → ON
    		Below 1 V →
    10 to 14 V
    ECUB (P10-10) - Body ground
    		BR - Body ground
    		ECU power supply
    		Always
    		10 to 14 V
    MPX1 (P10-22) - Body ground
    		SB - Body ground
    		Multiplex communication signal circuit
    		Ignition switch ON
    		Signal waveform
    B (P11-2) - Body ground
    		Y - Body ground
    		Motor drive power supply
    		Always
    		10 to 14 V

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

  4. Reconnect the P10 and P11 connectors to the back door ECU.

  5. Measure the voltage according to the value(s) in the table below.

    Standard voltage:

    Symbols
    (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    BZR- (P10-1) - BZR+ (P10-2)
    		O - B
    		Power back door warning buzzer signal input
    		Back door warning buzzer is
    stopped → sounded
    		Below 1 V →
    10 to 14 V
    HAF (P10-8) - Body ground
    		R - Body ground
    		Back door lock half-latch switch signal input
    		Back door is opened →
    back door closer motor is operated →
    back door is closed
    		Below 1 V →
    10 to 14 V →
    Below 1 V
    DC- (P10-11) - DC+ (P10-12)
    		B - G
    		Back door closer motor circuit
    		Back door closer motor is stopped → operated
    		Below 1 V →
    10 to 14 V
    FUL (P10-18) - Body ground
    		V - Body ground
    		Back door lock full-latch switch signal input
    		Back door is closed → opened
    		10 to 14 V →
    Below 1 V
    POS (P10-21) - Body ground
    		LG - Body ground
    		Back door lock position switch signal input
    		Back door is opened →
    back door closer motor is operated →
    back door is closed
    		Below 1 V →
    10 to 14 V →
    Below 1 V
    DS2 (P10-24) - DSG (P10-23)
    		GR - R
    		Power back door drive unit pulse sensor 2 signal input circuit
    		Power back door motor is stopped → operated
    		Below 1 V →
    Alternating between 10 to 14 V and below 1 V
    DS1 (P10-25) - DSG (P10-23)
    		Y - R
    		Power back door drive unit pulse sensor 1 signal input circuit
    		Power back door motor is stopped → operated
    		Below 1 V →
    Alternating between 10 to 14 V and below 1 V
    DSV (P10-26) - DSG (P10-23)
    		L - R
    		Power back door drive unit pulse sensor power supply circuit
    		Always
    		10 to 14 V
    BD+ (P11-1) - BD- (P11-3)
    		B - W
    		Power back door drive unit motor circuit
    		Power back door motor is stopped → operated
    		Below 1 V →
    10 to 14 V
    CL- (P11-6) - CL+ (P11-7)
    		G - BR
    		Power back door drive unit clutch circuit
    		Power back door motor is stopped → operated
    		Below 1 V →
    10 to 14 V

    HINT:
    1. Use an oscilloscope to check the output voltages of the power back door main switch, buzzer and pulse sensor.
    2. If the result is not as specified, the ECU may have a malfunction.


CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY(BODY ECU)


  1. Disconnect the 1A, 1D, 1F, 1M and B7 connectors from the instrument panel junction block assembly and body ECU.


    B112734E03

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

    Standard resistance:

    Symbols
    (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    GND1 (1F-10) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    GND2 (1M-9) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    PBDS (B7-2) - Body ground
    		V - Body ground
    		Power back door opener/ closer switch signal input
    		Power back door opener/closer switch OFF → ON
    		10 kΩ or higher →
    Below 1 Ω
    BCTY (B7-25) - Body ground
    		P - Body ground
    		Back door courtesy light switch signal input
    		Back door is closed → opened
    		10 kΩ or higher →
    Below 1 Ω

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

  3. Measure the voltage according to the value(s) in the table below.

    Standard voltage:

    Symbols
    (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    BATB (1A-1) - Body ground
    		B - Body ground
    		+B (power system, battery system) power supply
    		Always
    		10 to 14 V
    BECU (1D-10) - Body ground
    		W - Body ground
    		+B (BECU) power supply
    		Always
    		10 to 14 V
    ALTB (1D-16) - Body ground
    		W - Body ground
    		+B (power system, generator system) power supply
    		Always
    		10 to 14 V

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

  4. Reconnect the 1A, 1D, 1F, 1M and B7 connectors to the instrument panel junction block assembly and body ECU.

  5. Measure the voltage according to the value(s) in the table below.

    Standard voltage:

    Symbols
    (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    IG (1I-4) - Body ground
    		O - Body ground
    		Ignition switch power supply
    		Ignition switch OFF → ON
    		10 to 14 V → Below 1 V

    HINT:
    If the result is not as specified, the instrument panel junction block assembly and body ECU may have a malfunction.