Lexus ES: System Description
SYSTEM DESCRIPTION
ACTIVE NOISE CONTROL SYSTEM
(a) The active noise control system is a system that detects muffled engine sounds produced in sync that fluctuates according to the engine speed, by using the active noise control microphone and outputs anti-phase control sound through the audio speakers to reduce muffled engine sounds.
The active noise control system includes the following functions.
| Function Name | Function Description | Operation Conditions |
|---|---|---|
| ANC (Active Noise Control) Function | Function that reduces noise by using anti-phase and vibration control sound to interfere with muffled sounds | Engine running |
| ESE (Engine Sound Enhancement) Function | Function that produces realistic engine sounds by adding frequency component sound according to driving conditions such as vehicle speed and accelerator pedal depression | Both of the following conditions are met:
|
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System Diagram
SYSTEM DIAGRAM
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
Lost Communication With ECM/PCM "A" Missing Message (U010087,U012987,U014087,U016487)
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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DC/DC Converter Temperature Sensor 2 Circuit Voltage Out of Range (P0E581C)
DTC SUMMARY MALFUNCTION DESCRIPTION These DTCs indicate that the boost converter temperature sensor 2 (lower) value is abnormal. The cause of this malfunction may be one of the following: Internal inverter malfunction
Inverter with converter assembly internal circuit malfunction
Hybrid coolin
Lost Communication with Battery Monitor Module Missing Message (P162B87)
DESCRIPTION The hybrid vehicle control ECU communicates with the battery state sensor assembly via LIN communication. If a LIN communication error is detected, the hybrid vehicle control ECU stores this DTC. DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Me
