OBDII Code List

C1783 LEXUS - Door Courtesy Switch Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Door Courtesy Switch
  • Door Courtesy Switch harness is open or shorted
  • Door Courtesy Switch circuit poor electrical connection
  • Faulty Suspension Control ECU

Possible symptoms

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

C1783 Lexus Description

The door courtesy switch comes on when the door is opened and goes off when the door is closed. Therefore, battery positive voltage is applied to a terminal of the Suspension Control ECU when all the doors are closed and 0 V is applied when even one door is opened.
OBDII Code C1783 Lexus - Door Courtesy Switch Circuit -

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C1783 LEXUS Comments

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