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Home >> Lexus >> 2019 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System / Washer System - Diagnostic Codes & Circuit Tests >> Wiper And Washer System >> DTC B1372: Wiper Switch Signal Mismatch between LIN and Line [12/2017 - 10/2023] >> Description

DTC B1372: Wiper Switch Signal Mismatch between LIN and Line [12/2017 - 10/2023]: Description

Under normal operation, the windshield wiper motor assembly receives operation signals from the windshield wiper switch assembly via LIN communication.

The windshield wiper motor assembly and windshield wiper switch assembly are also connected via direct line in order to operate the front wipers in HI in an emergency. If the operation signals sent via LIN communication and direct line do not match, this DTC is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory DTC Output from
B1372 Wiper Switch Signal Mismatch between LIN and Line DTC Detection Condition: 
  1. Engine switch on (IG) (IG+ voltage 9.5 V or higher)

Malfunction Condition: 
  1. LIN communication and direct line input signals do not match

Malfunction Duration: 
  1. Malfunction determined if the status continues for 10 seconds or more
  • Windshield wiper motor assembly
  • Steering sensor
  • Harness or connector
Wiper