Tire Pressure Warning System (For Hatchback) Terminals Of Ecu

Suspension. Yaris. Ncp93, 131
Tire Pressure Monitoring. Yaris. Ncp93, 131

  1. CHECK TIRE PRESSURE WARNING ECU AND RECEIVER

Tire Pressure Warning System (For Hatchback) -- Terminals Of Ecu



CHECK TIRE PRESSURE WARNING ECU AND RECEIVER
HINT:
Inspect the connectors from the back side while the connectors are connected.

Yaris. Ncp93, 131.Tire Pressure Monitoring.Tire Pressure Warning System (For Sedan).Tire Pressure Warning System (For Hatchback) Terminals Of Ecu

  1. Measure the voltage and resistance according to the value(s) in the table below. If the result is not as specified, the ECU may have a malfunction.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    J69-1 (IG) - J69-12 (GND)
    		L - W-B
    		IG power source
    		Ignition switch ON
    		11 to 14 V
    J69-3 (CLSW) - J69-12 (GND)
    		LG - W-B
    		Tire pressure warning reset switch
    1. Ignition switch ON
    2. Tire pressure warning reset switch on
    		Below 1.5 V
    1. Ignition switch ON
    2. Tire pressure warning reset switch off
    		8 to 14 V
    J69-4 (RDA) - J69-12 (GND)
    		R - W-B
    		Output signals
    		Ignition switch ON
    		Pulse generation (see waveform 1)
    J69-5 (PRG) - J69-12 (GND)
    		W - W-B
    		Input signals
    		Ignition switch ON
    		Pulse generation (see waveform 1)
    J69-7 (+B) - J69-12 (GND)
    *1
    		R - W-B
    		Battery
    		Always
    		11 to 14 V
    J69-12 (GND) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    1. *1: w/ Wireless Door Lock System


    2. Yaris. Ncp93, 131.Tire Pressure Monitoring.Tire Pressure Warning System (For Sedan).Tire Pressure Warning System (For Hatchback) Terminals Of Ecu

  2. Using an oscilloscope, check waveform 1.

    Text in Illustration
    *a
    		Example
    *b
    		GND
    Waveform 1:
    Item
    		Contents
    Terminal
    		J69-4 (RDA) - J69-12 (GND)
    J69-5 (PRG) - J69-12 (GND)
    Tool setting
    		5 V/DIV, 500 μs./DIV.
    Vehicle condition
    		Ignition switch ON
    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.