LIGHTING SYSTEM(for Halogen Headlight) TERMINALS OF ECU


  1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (except 5L-E)

    B001CIBC01
    *A Main Body ECU (Multiplex Network Body ECU) with 3 connectors *B for LHD
    *C for RHD - -
    *1 Main Body ECU (Multiplex Network Body ECU) - -
    B001HRGC01
    *A Main Body ECU (Multiplex Network Body ECU) with 2 connectors *B for LHD
    *C for RHD - -
    *1 Main Body ECU (Multiplex Network Body ECU) - -

    1. Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.

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    2. Connect the driver side 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 None - Body ground IG power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      A-31 (BECU) - Body ground None - Body ground Battery power supply Always 11 to 14 V
      A-30 (ACC) - Body ground None - Body ground ACC power supply Ignition switch ACC 11 to 14 V
      Ignition switch off Below 1 V
      A-11 (GND1) - Body ground None - Body ground Body ground Always Below 1 Ω

    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
      G216-23 (AHBI) - Body ground*5 P - Body ground Auto high beam switch signal input Auto high beam switch on Below 1 V
      Auto high beam switch off 11 to 14 V
      G218-1 (DIM) - Body ground P - Body ground H-LP HI relay drive output Ignition switch ON, headlight dimmer switch in high or high flash position Below 1 V
      Ignition switch ON, headlight dimmer switch not in high or high flash position 11 to 14 V
      G218-8 (A) - Body ground*6 W - Body ground Light control switch Auto position signal input Light control switch in Auto position Below 1 V
      Light control switch not in Auto position 11 to 14 V
      G218-10 (HF) - Body ground V - Body ground Headlight dimmer switch high flash position signal input Headlight dimmer switch in high flash position Below 1 V
      Headlight dimmer switch not in high flash position 11 to 14 V
      G218-12 (HEAD) - Body ground SB - Body ground Light control switch head position signal input Light control switch in head position Below 1 V
      Light control switch not in head position 11 to 14 V
      G218-19 (CLTB) - G218-21 (CLTE)*6 P - L Automatic light control sensor power supply output Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      G218-20 (CLTS) - Body ground*6 R - Body ground Automatic light control sensor signal input Ignition switch off Below 1 V
      Automatic light control system operating

      Pulse generation

      (See waveform 1)
      G218-22 (TAIL) - Body ground W - Body ground Light control switch tail position signal input Light control switch in tail or head position Below 1 V
      Light control switch not in tail or head position 11 to 14 V
      G218-23 (RFOG) - Body ground*1 SB - Body ground Fog light switch rear position input Fog light switch in rear position Below 1 V
      Fog light switch off 11 to 14 V
      G218-24 (HU) - Body ground LG - Body ground Headlight dimmer switch high position signal input Headlight dimmer switch in high flash position Below 1 V
      Headlight dimmer switch not in high flash position 11 to 14 V
      G218-26 (FFOG) - Body ground*2 G - Body ground Fog light switch front position input Fog light switch in front position Below 1 V
      Fog light switch off 11 to 14 V
      2M-26 - Body ground LG - Body ground Taillight drive output Light control switch in tail or head position Below 1 V
      Light control switch off 11 to 14 V
      2Q-31 - Body ground*3 LG - Body ground Taillight drive output Light control switch in tail or head position Below 1 V
      Light control switch off 11 to 14 V
      2N-9 - Body ground*4 LG - Body ground Taillight drive output Light control switch in tail or head position Below 1 V
      Light control switch off 11 to 14 V
      2M-17 (HRLY) - Body ground GR - Body ground H-LP LO relay drive output Ignition switch ON, light control switch in head position Below 1 V
      Ignition switch ON, light control switch not in head position 11 to 14 V
      2Q-11 - Body ground*1, *3 G - Body ground Rear fog light drive output Light control switch in tail or head position, fog light switch off Below 1 V
      Light control switch in tail or head position, fog light switch in rear position 11 to 14 V
      2P-11 - Body ground*1, *4 G - Body ground Rear fog light drive output Light control switch in tail or head position, fog light switch off Below 1 V
      Light control switch in tail or head position, fog light switch in rear position 11 to 14 V
      2M-19 - Body ground*2 W - Body ground Front fog light drive output Light control switch in tail or head position, fog light switch off Below 1 V
      Light control switch in tail or head position, fog light switch in front position 11 to 14 V
      2O-40 (DRLE) - Body ground*7 P - Body ground DRL relay drive output Daytime running light on Below 1 V
      Daytime running light off 11 to 14 V

      *1: w/ Rear Fog Light

      *2: w/ Front Fog Light

      *3: for LHD

      *4: for RHD

      *5: w/ Automatic High Beam System

      *6: w/ Automatic Light Control System

      *7: w/ Daytime Running Light

    6. B001ELCE04

      Waveform 1

      Item Content
      Terminal No. (Symbol) G218-20 (CLTS) - Body ground
      Tool Setting 2 V/DIV., 10 ms./DIV.
      Condition Automatic light control system operating

      Tech Tips

      The communication waveform changes according to the surrounding brightness.

  2. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (for 5L-E)

    B001H5NC01
    *A for LHD *B for RHD
    *1 Main Body ECU (Multiplex Network Body ECU) - -

    1. Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.

      Click here

    2. Connect the driver side 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 None - Body ground IG power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      A-30 (BECU) - Body ground None - Body ground Battery power supply Always 11 to 14 V
      A-29 (ACC) - Body ground None - Body ground ACC power supply Ignition switch ACC 11 to 14 V
      Ignition switch off Below 1 V
      A-11 (GND1) - Body ground None - Body ground Body ground Always Below 1 Ω

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

      Click here

    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
      G64-15 (DIM) - Body ground P - Body ground H-LP HI relay drive output Ignition switch ON, headlight dimmer switch in high or high flash position Below 1 V
      Ignition switch ON, headlight dimmer switch not in high or high flash position 11 to 14 V
      2F-40 (HRLY) - Body ground GR - Body ground H-LP LO relay drive output Ignition switch ON, light control switch in head position Below 1 V
      Ignition switch ON, light control switch not in head position 11 to 14 V
      G64-8 (HF) - Body ground V - Body ground Headlight dimmer switch high flash position signal input Headlight dimmer switch in high flash position Below 1 V
      Headlight dimmer switch not in high flash position 11 to 14 V
      G64-29 (HEAD) - Body ground SB - Body ground Light control switch head position signal input Light control switch in head position Below 1 V
      Light control switch not in head position 11 to 14 V
      G64-30 (TAIL) - Body ground W - Body ground Light control switch tail position signal input Light control switch in tail or head position Below 1 V
      Light control switch not in tail or head position 11 to 14 V
      G64-23 (RFOG) - Body ground*1 SB - Body ground Fog light switch rear position input Fog light switch in rear position Below 1 V
      Fog light switch off 11 to 14 V
      G64-5 (HU) - Body ground LG - Body ground Headlight dimmer switch high position signal input Headlight dimmer switch in high flash position Below 1 V
      Headlight dimmer switch not in high flash position 11 to 14 V
      G64-27 (FFOG) - Body ground*2 G - Body ground Fog light switch front position input Fog light switch in front position Below 1 V
      Fog light switch off 11 to 14 V
      2F-7 - Body ground LG - Body ground Taillight drive output Light control switch in tail or head position Below 1 V
      Light control switch off 11 to 14 V
      2I-16 - Body ground*3 LG - Body ground Taillight drive output Light control switch in tail or head position Below 1 V
      Light control switch off 11 to 14 V
      2D-32 - Body ground*4 LG - Body ground Taillight drive output Light control switch in tail or head position Below 1 V
      Light control switch off 11 to 14 V
      2F-19 - Body ground*1 GR-L - Body ground Rear fog light drive output Light control switch in tail or head position, fog light switch in rear position Below 1 V
      Light control switch in tail or head position, fog light switch off 11 to 14 V
      2F-9 - Body ground*2 W - Body ground Front fog light drive output Light control switch in tail or head position, fog light switch off Below 1 V
      Light control switch in tail or head position, fog light switch in front position 11 to 14 V

      *1: w/ Rear Fog Light

      *2: w/ Front Fog Light

      *3: for LHD

      *4: for RHD

  3. CHECK COMBINATION METER ASSEMBLY

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