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)
SEE MORE:
Hybrid/EV Battery Current/DC/DC Converter Current Signal Compare Failure (P1CFF62)
DTC SUMMARY MALFUNCTION DESCRIPTION If there is a large difference between the reactor current sensor value and the HV battery current sensor value, a malfunction will be detected. Internal inverter malfunction
Current sensor malfunction
Inverter with converter assembly internal circuit malfunc
Voice Guidance does not Function
WIRING DIAGRAM PROCEDURE 1. CHECK VOICE GUIDANCE SETTING (a) Check that the voice guidance settings are not off. OK: Voice guidance settings are not off. NG CHANGE VOICE GUIDANCE SETTINGS TO ON
OK 2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - NA
