Lexus ES: Terminals Of Ecu
TERMINALS OF ECU
STEREO COMPONENT EQUALIZER ASSEMBLY
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| G15-1 (CANH) | P | CAN communication signal | - | - |
| G15-2 (ACK1) | V | Serial communication (UART) signal | - | - |
| G15-3 (NEI) - G15-28 (GND) | LA-B - LA | Engine pulse signal | Idling with warm engine | Pulse generation (See waveform 1) |
| G15-5 (MC3+) - G15-28 (GND) | W - LA | Active noise control microphone input signal | No. 3 active noise control microphone tapped with finger | Pulse generation |
| G15-6 (MC2+) - G15-28 (GND) | W - LA | Active noise control microphone input signal | No. 2 active noise control microphone tapped with finger | Pulse generation |
| G15-7 (MC1+) - G15-28 (GND) | V - LA | Active noise control microphone input signal | No. 1 active noise control microphone tapped with finger | Pulse generation |
| G15-10 (CH3+) - G15-28 (GND) | W- LA | Active noise control microphone output signal | Active noise control system operating | Pulse generation |
| G15-11 (CH2+) - G15-28 (GND) | L - LA | Active noise control microphone output signal | Active noise control system operating | Pulse generation |
| G15-12 (CH1+) - G15-28 (GND) | BR - LA | Active noise control microphone output signal | Active noise control system operating | Pulse generation |
| G15-13 (ACC) - G15-28 (GND) | P - LA | Power source (ACC) | Engine switch on (ACC) | 11 to 14 V |
| G15-14 (+B) - G15-28 (GND) | LA-R - LA | Power source | Always | 11 to 14 V |
| G15-15 (CANL) | W | CAN communication signal | - | - |
| G15-16 (ACK2) | BE | Serial communication (UART) signal | - | - |
| G15-17 (ACNT) - G15-28 (GND) | SB - LA | Active noise control system control signal | Engine switch on (IG) | Below 1 V |
| Engine switch on (ACC) | 4.5 V or higher | |||
| G15-19 (MC3-) - G15-28 (GND) | SB - LA | Active noise control microphone input signal | Always | Below 1 Ω |
| G15-20 (MC2-) - G15-28 (GND) | SB - LA | Active noise control microphone input signal | Always | Below 1 Ω |
| G15-21 (MC1-) - G15-28 (GND) | LG - LA | Active noise control microphone input signal | Always | Below 1 Ω |
| G15-24 (CH3-) - G15-28 (GND) | Y - LA | Active noise control microphone output signal | Active noise control system operating | Pulse generation |
| G15-25 (CH2-) - G15-28 (GND) | R - LA | Active noise control microphone output signal | Active noise control system operating | Pulse generation |
| G15-26 (CH1-) - G15-28 (GND) | G - LA | Active noise control microphone output signal | Active noise control system operating | Pulse generation |
| G15-27 (IGN) - G15-28 (GND) | LA-SB - LA | Power source (IG) | Engine switch on (IG) | 11 to 14 V |
| G15-28 (GND) - Body ground | LA - Body ground | Ground | Always | Below 1 Ω |
(a) Waveform 1
HINT:
The oscilloscope waveform shown in the illustration is an example for reference only. The waveform fluctuates according to engine speed.
| Item | Condition |
|---|---|
| Measurement terminal | G15-3 (NEI) - G15-28 (GND) |
| Tool setting | 5 V/DIV., 20 ms./DIV. |
| Vehicle condition | Idling after warming up |
STEREO COMPONENT AMPLIFIER ASSEMBLY
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| G12-2 (ACK1) | V | Serial communication (UART) signal | - | - |
| G12-3 (ACNT) - G11-3 (GND) | SB - W-B | Active noise control system control signal | Active noise control system operating | Below 1 V |
| Active noise control system not operating | 4.5 V or higher | |||
| G12-6 (AN3+) - G11-3 (GND) | W - W-B | Active noise control microphone input signal | Active noise control system operating | Pulse generation |
| G12-7 (AN2+) - G11-3 (GND) | L - W-B | Active noise control microphone input signal | Active noise control system operating | Pulse generation |
| G12-8 (AN1+) - G11-3 (GND) | BR - W-B | Active noise control microphone input signal | Active noise control system operating | Pulse generation |
| G12-10 (ACK2) | BE | Serial communication (UART) signal | - | - |
| G12-13 (ASG1) - G11-3 (GND) | Shielded - W-B | Shield ground | Always | Below 1 Ω |
| G12-14 (AN3-) - G11-3 (GND) | Y - W-B | Active noise control microphone input signal | Active noise control system operating | Pulse generation |
| G12-15 (AN2-) - G11-3 (GND) | R - W-B | Active noise control microphone input signal | Active noise control system operating | Pulse generation |
| G12-16 (AN1-) - G11-3 (GND) | G - W-B | Active noise control microphone input signal | Active noise control system operating | Pulse generation |
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