Lexus ES: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Active Noise Control System| DTC No. | Detection Item | Link |
|---|---|---|
| B1AA044 | ANC ECU EEPROM Data Memory Failure | |
| B1AA187 | UART Communication Between ANC and Audio Amplifier Missing Message | |
| B1AA296 | Front Left Microphone Circuit Component Internal Failure | |
| B1AA31C | Front Left Microphone Circuit Circuit Voltage Out of Range | |
| B1AA696 | Front Right Microphone Circuit Component Internal Failure | |
| B1AA71C | Front Right Microphone Circuit Circuit Voltage Out of Range | |
| B1AAA96 | Rear Center Microphone Circuit Component Internal Failure | |
| B1AAB1C | Rear Center Microphone Circuit Circuit Voltage Out of Range | |
| P033531 | Crankshaft Position Sensor "A" No Signal | |
| U010087 | Lost Communication With ECM/PCM "A" Missing Message | |
| U012987 | Lost Communication With Brake System Control Module Missing Message | |
| U014087 | Lost Communication with Body Control Module Missing Message | |
| U016487 | Lost Communication with HVAC Control Module Missing Message | |
| U029387 | Lost Communication With Hybrid Powertrain Control Module Missing Message | |
| U115187 | Lost Communication with Hybrid Powertrain Control Module (C-Bus) Missing Message | |
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Dtc Check / Clear
DTC CHECK / CLEAR CHECK FOR DTC (CHECK USING TECHSTREAM) (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Elec
Freeze Frame Data
FREEZE FRAME DATA CHECK FREEZE FRAME DATA HINT: Whenever an active noise control system DTC is stored, the stereo component equalizer assembly stores the current vehicle state as freeze frame data. (a
How To Proceed With Troubleshooting
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK
NEXT 3. INSPECT AUXILIARY BATTERY VOLTAGE (a)
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Assist Map Number Un-Writing (C1581)
DESCRIPTION This DTC will be stored if the power steering ECU (rack and pinion power steering gear assembly) determines that the assist map is not written in the ECU. DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note C1581
Wheel Speed Sensor Malfunction (C164D)
DESCRIPTION This DTC is stored when the clearance warning ECU assembly receives a wheel speed sensor (front speed sensor RH or front speed sensor LH, rear speed sensor RH or rear speed sensor LH) abnormality signal from the electronically controlled brake system via CAN communication. DTC No. D
