Lexus NX: Terminals Of Ecu
TERMINALS OF ECU
CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
| *1 | Main Body ECU (Multiplex Network Body ECU) | - | - |
(a) Measure the voltage and check for pulses according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| I48-1 (DIM) - Body ground | L - Body ground | High beam headlight drive output | Power switch off | Below 1 V |
| Power switch on (IG) | 11 to 14 V | |||
| I48-8 (A) - Body ground | G - 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 | |||
| I48-23 (AHBI) - Body ground | P - Body ground | Combination switch assembly (automatic high beam main switch) signal input | Combination switch assembly (automatic high beam main switch) on | Below 1 V |
| Combination switch assembly (automatic high beam main switch) off | 11 to 14 V | |||
| I48-24 (HU) - Body ground | Y - Body ground | Headlight dimmer switch high position signal input | Headlight dimmer switch in high position | Below 1 V |
| Headlight dimmer switch not in high position | 11 to 14 V | |||
| I48-19 (CLTB) - I48-21 (CLTE) | W - V | Automatic light control sensor power supply output | Power switch off | Below 1 V |
| Power switch on (IG) | 11 to 14 V | |||
| I48-20 (CLTS) - Body ground | P - Body ground | Automatic light control sensor signal input | Power switch off | Below 1 V |
| Automatic light control system operating | Pulse generation (See waveform 1) |
(b) Waveform 1
| Item | Content |
|---|---|
| Terminal No. (Symbol) | I48-20 (CLTS) - Body ground |
| Tool Setting | 2 V/DIV., 10 ms./DIV. |
| Condition | Automatic light control system operating |
HINT:
The communication waveform changes according to the surrounding brightness.
CHECK FORWARD RECOGNITION CAMERA
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