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Home >> Lexus >> 2021 >> RC F Base >> Repair and Diagnosis (Single Page) >> Steering >> Steering Column >> Power Tilt & Power Telescopic Steering Column System - Diagnostic Codes & Circuit Tests >> Power Tilt And Power Telescopic Steering Column System >> DTC B2603: Tilt and Telescopic Manual Switch Circuit Malfunction [09/2014 - ] >> Description

DTC B2603: Tilt and Telescopic Manual Switch Circuit Malfunction [09/2014 - ]: Description

Different voltage values are sent to the multiplex tilt and telescopic ECU by operating the tilt and telescopic switch. The multiplex tilt and telescopic ECU then judges which motor and in which direction that motor should operate based on the voltage value.

DTC No. Detection Item DTC Detection Condition Trouble Area
B2603 Tilt and Telescopic Manual Switch Circuit Malfunction When operating the tilt and telescopic switch, an abnormal voltage value is sent to the multiplex tilt and telescopic ECU.
  • Tilt and telescopic switch
  • Harness or connector
  • Multiplex tilt and telescopic ECU