Lexus ES: Terminals Of Ecu
TERMINALS OF ECU
STEREO COMPONENT EQUALIZER ASSEMBLY
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| 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) | Power switch on (ACC) | 11 to 14 V |
| G15-14 (+B) - G15-28 (GND) | LA-R - LA | Power source | Power switch off | 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 | Power switch on (IG) | Below 1 V |
| Power 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) | Power 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.
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| 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
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| 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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Lost Communication With ECM/PCM "A" Missing Message (U010087,U012987,U014087,U016487,U029387,U115187)
DESCRIPTION These DTCs are stored when a malfunction occurs in the CAN communication circuit. DTC No. Detection Item DTC Detection Condition Trouble Area U010087 Lost Communication With
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Check For Intermittent Problems
CHECK FOR INTERMITTENT PROBLEMS NOTICE:
If the vehicle or vehicle controls are operated (for example, during initial inspection when the vehicle is brought in for repair) before operation history has been read and saved, the operation history information could be lost.
The Operation History fun
