Lexus ES manuals

Lexus ES: 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 PARK/NEUTRAL POSITION SWITCH ASSEMBLY (a) Measure the resistance according to the value(s) in the table below when the transmission control shaft lever is moved to each position. Standard Resistance: Tester Connection Condition Specified Condition 4 (B)

 Crankshaft Position - Camshaft Position Correlation Bank 1 Sensor B (P001700)

DESCRIPTION Refer to DTC P001313. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P001700 Crankshaft Position - Camshaft Position Correlation Bank 1 Sensor B Deviation in the crankshaft position sensor signal and camshaft position senso

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