Lexus ES manuals

Lexus ES: Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

Wiper and Washer System

DTC No.

Detection Item

DTC Output from

Link

B1245

Lost Communication with Wiper ECU LIN

Main Body

B1279

Lost Communication with Humidity/Rain Sensor LIN

Main Body

B1370

ECU Malfunction

Windshield wiper motor assembly

B1372

Wiper Switch Signal Mismatch between LIN and Line

Wiper

B1373

Lost Communication with Wiper System LIN BUS

Main Body

B1400

Rain Sensor Malfunction

Rain sensor

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 Lost Communication with Wiper ECU LIN (B1245)

DESCRIPTION The main body ECU (multiplex network body ECU) and windshield wiper motor assembly communicate via LIN communication. The main body ECU (multiplex network body ECU) stores this DTC if comm

 Lost Communication with Humidity/Rain Sensor LIN (B1279)

DESCRIPTION The main body ECU (multiplex network body ECU) and rain sensor communicate via LIN communication. The main body ECU (multiplex network body ECU) stores this DTC if communication becomes ab

 ECU Malfunction (B1370)

DESCRIPTION This DTC is stored when the windshield wiper motor assembly detects an internal malfunction. DTC No. Detection Item DTC Detection Condition Trouble Area Memory DTC Output from

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 Motor Control Relay Stuck ON (Fr Shade) (B234A)

DESCRIPTION This DTC will be stored if the operation of the front roof sunshade is suspended and a pulse input of 10 Hz or more is detected when the motor relay is off. DTC No. Detection Item DTC Detection Condition Trouble Area B234A Motor Control Relay Stuck ON (Fr Shade) Position

 On-vehicle Inspection

ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT RAIN SENSOR (a) Disconnect the rain sensor connector. *a Front view of wire harness connector (to Rain Sensor) (b) Measure the voltage according to the value(s) in the table below. Standard Voltage: Tester Connection Conditi

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