AUTOMATIC HIGH BEAM SYSTEM TERMINALS OF ECU

*A	Main Body ECU (Multiplex Network Body ECU) with 1 connector	*B	Main Body ECU (Multiplex Network Body ECU) with 3 connectors
*1	Main Body ECU (Multiplex Network Body ECU)	-	-

CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY, MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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2. Connect the instrument panel junction block assembly connectors.

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   A-32 (IG) - Body ground	-	Ignition power supply	Ignition switch ON	11 to 14 V*1 10.5 to 14 V*2
   			Ignition switch off	Below 1 V
   A-30 (BECU) - Body ground	-	Battery power supply	Always	11 to 14 V
   A-29 (ACC) - Body ground	-	ACC power supply	Ignition switch ACC	11 to 14 V
   			Ignition switch off	Below 1 V
   A-11 (GND1) - Body ground	-	Ground	Always	Below 1 Ω

   *1: w/o Stop and Start System

   *2: w/ Stop and Start System

   If the result is not as specified, there may be a malfunction in the wire harness or instrument panel junction block assembly.

4. Install the main body ECU (multiplex network body ECU).

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   3B-54 (DIM) - Body ground	LG - Body ground	DIMMER relay drive output	Headlight dimmer switch in high or high flash position	Below 1 V
   			Headlight dimmer switch not in high or high flash position	11 to 14 V
   G78-5 (HU) - Body ground	Y - Body ground	Headlight dimmer switch high signal input	Headlight dimmer switch in high position	Below 1 V
   			Headlight dimmer switch in low position	Pulse generation*1 11 to 14 V*2
   G78-20 (CLTB) - G78-22 (CLTE)	W - V	Automatic light control sensor power supply output	Ignition switch off	Below 1 V
   			Ignition switch ON Headlight dimmer switch in AUTO position	11 to 14 V
   G78-21 (CLTS) - Body ground	G - Body ground	Automatic light control sensor signal input	Ignition switch off	Below 1 V
   			Ignition switch ON Headlight dimmer switch in AUTO position Automatic light control sensor covered with a hand → Automatic light control sensor exposed to ambient light	Pulse generation (See waveform 1)
   G78-28 (A) - Body ground	G - Body ground	Headlight dimmer switch AUTO position signal input	Headlight dimmer switch in AUTO position	Below 1 V
   			Headlight dimmer switch not in AUTO position	Pulse generation*1 11 to 14 V*2

   *1: Main Body ECU (multiplex network body ECU) with 3 Connectors

   *2: Main Body ECU (multiplex network body ECU) with 1 Connectors

   1. 

      Waveform 1

      Item	Content
      Terminal No. (Symbol)	G78-21 (CLTS) - Body ground
      Tool setting	5 V/DIV., 5 ms./DIV.
      Condition	Ignition switch ON Headlight dimmer switch in AUTO position Automatic light control sensor covered with a hand → Automatic light control sensor exposed to ambient light

      Tip:

      If the ambient light becomes brighter, width A becomes narrower.

CHECK LANE DEPARTURE WARNING CAMERA

1. Check the lane departure warning camera.

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