Toyota Parking Assist-Sensor System (W/O Multi-Display) Terminals Of Ecu

  1. CHECK CLEARANCE WARNING ECU

Toyota Parking Assist-Sensor System (W/O Multi-Display) -- Terminals Of Ecu



CHECK CLEARANCE WARNING ECU

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Park Assist Monitoring.Toyota Parking Assist-Sensor System (W/ Multi-Display).Toyota Parking Assist-Sensor System (W/O Multi-Display) Terminals Of Ecu

  1. Measure the voltage and resistance and check for pulse signals according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    I1-3 (SPD) - I1-21 (E)
    		R - W-B
    		Vehicle speed signal
    		Ignition switch ON, back sonar or clearance sonar switch on
    		Alternating between 1.5 to 4.5 V
    I1-6 (SOR) - I1-22 (E2)
    		W - R
    		Rear ultrasonic sensor communication signal (Rear clearance sonar sensor)
    		Ignition switch ON, back sonar or clearance sonar switch on, shift lever in R
    		Pulse generation
    (See waveform 2)
    I1-8 (CSSW) - I1-21 (E)
    		V - W-B
    		Clearance sonar on/off switch signal
    		Back sonar or clearance sonar switch on
    		11 to 14 V
    I1-10 (IG) - I1-21 (E)
    		L - W-B
    		IG signal/IG power source signal
    		Ignition switch off
    		Below 1 V
    Ignition switch ON
    		11 to 14 V
    I1-13 (RL) - I1-21 (E)
    		R - W-B
    		Reverse signal
    		Ignition switch ON, shift lever in R
    		11 to 14 V
    Ignition switch ON, shift lever not in R
    		Below 1 V
    I1-14 (BBZ) - I1-12 (EF)
    		GR - LG
    		No. 1 clearance warning buzzer signal
    		Buzzer not sounding
    		Below 1 V
    When sonar detects obstacle (buzzer sounds)
    		Pulse generation
    (See waveform 1)
    I1-15 (L1) - I1-21 (E)
    		LG - W-B
    		Clearance warning ECU signal
    		Clearance warning indicator LED for rear right sensor illuminates
    		Below 3 V
    I1-17 (L3) - I1-21 (E)
    		L - W-B
    		Ultrasonic sensor (rear center right and left sensor)
    		Clearance warning indicator LED for rear left sensor illuminates
    		Below 3 V
    I1-19 (L5) - I1-21 (E)
    		P - W-B
    		Ultrasonic sensor (rear left sensor)
    		Clearance warning indicator LED for back sensor illuminates
    		Below 3 V
    I1-20 (L6) - I1-21 (E)
    		R - W-B
    		Ultrasonic sensor (rear right sensor)
    		Clearance warning indicator's operation indicator illuminates
    		Below 3 V
    I1-21 (E) - Body ground
    		W-B - Body ground
    		ECU ground
    		Always
    		Below 1 Ω
    I1-22 (E2) - I1-21 (E)
    		R - W-B
    		ECU ground
    		Always
    		Below 1 Ω
    I1-24 (BOR) - I1-22 (E2)
    		P - R
    		Rear ultrasonic sensor circuit power source
    		Ignition switch off
    		Below 1.5 V
    Ignition switch ON, back sonar or clearance sonar switch on
    		7.2 to 8.8 V


    2. Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Park Assist Monitoring.Toyota Parking Assist-Sensor System (W/ Multi-Display).Toyota Parking Assist-Sensor System (W/O Multi-Display) Terminals Of Ecu

  2. Using an oscilloscope, check waveform 1.

    Measurement Condition
    Item
    		Content
    Terminal No. (Symbol)
    		I1-14 (BBZ) - I1-12 (EF)
    Tool Setting
    		2 V/DIV., 500 μsec./DIV.
    Condition
    		When sonar detects obstacle (buzzer sounds)


    3. Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Park Assist Monitoring.Toyota Parking Assist-Sensor System (W/ Multi-Display).Toyota Parking Assist-Sensor System (W/O Multi-Display) Terminals Of Ecu

  3. Using an oscilloscope, check waveform 2.

    Measurement Condition
    Item
    		Content
    Terminal No. (Symbol)
    		I1-6 (SOR) - I1-22 (E2)
    Tool Setting
    		5 V/DIV., 1 msec./DIV.
    Condition
    		Ignition switch ON, back sonar or clearance sonar switch on, shift lever in R