Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Wiper and Washer System| DTC No. | Detection Item | DTC Detection Condition | Link |
|---|---|---|---|
| B1245 | Lost Communication with Wiper ECU LIN | When the battery voltage is 9.5 V or more, a communication malfunction between the main body ECU (multiplex network body ECU) and windshield wiper motor and link assembly (wiper ECU) is detected for 10 seconds or more | |
| B1278 | Lost Communication with Combination Switch ECU | When the battery voltage is 9.5 V or more, a communication malfunction between the main body ECU (multiplex network body ECU) and windshield wiper switch assembly is detected for 10 seconds or more. | |
| B1279 | Lost Communication with Humidity/Rain Sensor LIN | When the battery voltage is 9.5 V or more, a communication malfunction between the main body ECU (multiplex network body ECU) and rain sensor is detected for 10 seconds or more. | |
| B1370 | ECU Malfunction | When the battery voltage is 9.5 V or more, a malfunction is detected for 10 seconds or more during the wiper ECU self-check. | |
| B1372 | Wiper Switch Signal Mismatch between LIN and Line | When the battery voltage is 9.5 V or more, the operation signals sent via LIN communication and direct line do not match for 10 seconds or more. | |
| B1373 | Lost Communication with Wiper System LIN BUS | When the battery voltage is 9.5 V or more, a malfunction in the communication or LIN communication line between the main body ECU (multiplex network body ECU) and components of the wiper system occurs for 7 seconds or more 3 times consecutively. | |
| B1400 | Rain Sensor Malfunction |
| |
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Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a pa ...
Lost Communication with Wiper ECU LIN (B1245)
DESCRIPTION The main body ECU (multiplex network body ECU) and windshield wiper motor and link assembly communicate via LIN communication. The main body ECU (multiplex network body ECU) stores this DT ...
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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