Lexus ES: Diagnostic Trouble Code Chart
Lexus ES (XZ10) Service Manual / Engine & Hybrid System / Cruise Control / Front Radar Sensor System (for Hv Model) / Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Front Radar Sensor System| DTC No. | Detection Item | Link |
|---|---|---|
| C1A1100 | Front Radar Sensor Optical Axis Misalignment Malfunction | |
| C1A8C46 | Main Microcomputer in Front Radar Sensor Calibration/Parameter Memory Failure | |
| C1A8D1C | Power Supply Circuit in Front Radar Sensor Circuit Voltage Out of Range | |
| C1A9000 | Malfunction of Millimeter-wave Circuit in Front Radar Sensor | |
| C1A9100 | Malfunction of Acceleration Sensor in Front Radar Sensor | |
| U010487 | Lost Communication with Cruise Control Module Missing Message | |
| U030557 | Software Incompatibility with Cruise Control Module Invalid/Incompatible Software Component | |
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Vehicle Control History
VEHICLE CONTROL HISTORY NOTICE: When checking the Vehicle Control History, make sure to record the output codes. Then, clear the Vehicle Control History (RoB) and check it again. CHECK VEHICLE CONTROL
Front Radar Sensor Optical Axis Misalignment Malfunction (C1A1100)
DESCRIPTION The millimeter wave radar sensor assembly performs self-diagnosis to check for misalignment of its beam axis. If misalignment is detected, the millimeter wave radar sensor assembly stores
Main Microcomputer in Front Radar Sensor Calibration/Parameter Memory Failure (C1A8C46,C1A8D1C,C1A9000,C1A9100)
DESCRIPTION When an internal malfunction is detected in the millimeter wave radar sensor assembly, a DTC is stored. DTC No. Detection Item DTC Detection Condition Trouble Area C1A8C46 M
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Inspection
INSPECTION PROCEDURE 1. INSPECT AIR FUEL RATIO SENSOR (for Bank 1) (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition 1 (HA1A) - 2 (+B) 20°C (68°F) 1.6 to 3.2 Ω 1 (HA1A) - 4 (A1A-)
Precaution
PRECAUTION PRECAUTIONS FOR INSPECTING POWER SOURCE FOR MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) NOTICE: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected. System Name See Procedure Lane Control System (for
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