LANE DEPARTURE ALERT SYSTEM TERMINALS OF ECU


  1. CHECK PRE-CRASH SAFETY CITY SENSOR

    A01VDJLE02

    1. Disconnect the L12 pre-crash safety city sensor connector.

      Note


      • DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the GTS once the inspection has been completed.

      • If a load of more than 10 kg (22 lb) is placed on the connector, it may break. Do not place more load than is necessary on the connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L12-3 (LDSW) - Body ground P - Body ground Resistance Lane departure switch being pressed Below 1 Ω
      L12-3 (LDSW) - Body ground P - Body ground Resistance Lane departure switch not being pressed 10 kΩ or higher
      L12-7 (IG1) - Body ground LG - Body ground Voltage Ignition switch ON (IG) 11 to 14 V
      L12-7 (IG1) - Body ground LG - Body ground Voltage Ignition switch off Below 1 V
      L12-10 (GND) ←→ Body ground W-B - Body ground Resistance Always Below 1 Ω

    3. Reconnect the L12 pre-crash safety city sensor connector.

    4. Check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L12-5 (CA1P) - Body ground R - Body ground CAN communication signal Ignition switch ON (IG) Pulse generation (Refer to waveform 1)
      L12-11 (CA1N) - Body ground W - Body ground CAN communication signal Ignition switch ON (IG) Pulse generation (Refer to waveform 1)

      Tech Tips

      If the result is not as specified, there is a CAN bus line, terminating resistor circuit (or product with this circuit) or pre-crash safety city sensor malfunction.

    5. A01VFCUE01
      Text in Illustration
      *a waveform 1

      Reference (Oscilloscope waveform)

      Measurement Condition
      Item Content
      Measurement Terminal

      • CH1: L12-5 (CA1P) - Body ground

      • CH2: L12-11 (CA1N) - Body ground
      Measurement Setting 1 V/DIV., 50 μsec./DIV.
      Condition Ignition switch ON (IG)