Tire Pressure Warning System Terminals Of Ecu

Suspension. Land Cruiser. Urj200, 202 Grj200 Vdj200
Tire Pressure Monitoring. Land Cruiser. Urj200, 202 Grj200 Vdj200

  1. CHECK TIRE PRESSURE WARNING ECU AND RECEIVER

Tire Pressure Warning System -- Terminals Of Ecu



CHECK TIRE PRESSURE WARNING ECU AND RECEIVER


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Tire Pressure Monitoring.Tire Pressure Warning System.Tire Pressure Warning System Terminals Of Ecu

  1. Disconnect the L65*1 or L75*2 tire pressure warning ECU and receiver connector and measure the voltage and resistance on the wire harness side.

    1. *1: w/o Front Antenna
    2. *2: w/ Front Antenna
    Text in Illustration
    *A
    		w/o Front Antenna
    *B
    		w/ Front Antenna
    *a
    		Front view of wire harness connector
    (to Tire Pressure Warning ECU and Receiver)

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    L65-1 (IG) - L65-12 (GND)*1
    L75-1 (IG) - L75-12 (GND)*2
    		B - BR
    		IG power source
    		Engine switch on (IG)
    		10 to 16 V
    L65-7 (+B) - L65-12 (GND)*1
    		R - BR
    		Power supply (from battery)
    		Always
    		10 to 16 V
    L65-9 (CANH) - L65-10 (CANL)*1
    L75-9 (CANH) - L75-10 (CANL)*2
    		R - W
    		CAN communication line
    		Engine switch off
    		54 to 69 Ω
    L65-12 (GND) - Body ground*1
    L75-12 (GND) - Body ground*2
    		BR - Body ground
    		Ground
    		Always
    		Below 1 Ω
    1. *1: w/o Front Antenna
    2. *2: w/ Front Antenna

  2. Connect the L65*1 or L75*2 tire pressure warning ECU and receiver connector.

    1. *1: w/o Front Antenna
    2. *2: w/ Front Antenna


  3. Measure the voltage and resistance according to the value(s) in the table below. If the result is not as specified, the ECU may be malfunctioning.

    HINT:
    Measure the values on the wire harness side while the connector is connected.

    Land Cruiser. Urj200, 202 Grj200 Vdj200.Tire Pressure Monitoring.Tire Pressure Warning System.Tire Pressure Warning System Terminals Of Ecu


    Text in Illustration
    *A
    		w/o Front Antenna
    		*B
    		w/ Front Antenna
    *a
    		Component with harness connected
    (Tire Pressure Warning ECU and Receiver)
    		-
    		-

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    L65-3 (CLSW) - L65-12 (GND)*1
    L75-3 (CLSW) - L75-12 (GND)*2
    		W - BR
    		Tire pressure warning reset switch
    1. Engine switch on (IG)
    2. Tire pressure warning reset switch on
    		Below 1.5 V
    1. Engine switch on (IG)
    2. Tire pressure warning reset switch off
    		8 to 15 V
    L65-4 (RDA) - L65-12 (GND)*1
    L75-4 (RDA2) - L75-12 (GND)*2
    		G - BR
    		Output signals
    		Engine switch on (IG)
    		Pulse generation (see waveform 1)
    L65-5 (PRG) - L65-12 (GND)*1
    L75-5 (PRG2) - L75-12 (GND)*2
    		L - BR
    		Input signals
    		Engine switch on (IG)
    		Pulse generation (see waveform 1)
    1. *1: w/o Front Antenna
    2. *2: w/ Front Antenna


    4. Land Cruiser. Urj200, 202 Grj200 Vdj200.Tire Pressure Monitoring.Tire Pressure Warning System.Tire Pressure Warning System Terminals Of Ecu

  4. Using an oscilloscope, check waveform 1.

    Text in Illustration
    *a
    		Example
    *b
    		GND
    Waveform 1:
    Item
    		Contents
    Terminal
    		L65-4 (RDA) - L65-12 (GND)*1
    L75-4 (RDA2) - L75-12 (GND)*2
    L65-5 (PRG) - L65-12 (GND)*1
    L75-5 (PRG2) - L75-12 (GND)*2
    Tool setting
    		5 V/DIV, 50 μs./DIV.
    Vehicle condition
    		Engine switch on (IG)
    1. *1: w/o Front Antenna
    2. *2: w/ Front Antenna
    HINT:
    The waveform shown in the illustration is an example. If the tester displays a waveform that alternates between high and low, where high is a voltage that is between the IG power source voltage and a voltage 2.2 V lower than the IG power source voltage, and where low is a voltage of between 0 and 1.2 V, the ECU can be judged normal.