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Home >> Kia >> 2020 >> Optima SX >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Anti-Lock Brake System (Abs)/Electronic Stability Control (ESC) Diagnosis) >> DTC C1503-01: TCS Switch Error >> Component Inspection >> ESP (ESC/TCS) OFF Switch Inspection

ESP (ESC/TCS) OFF Switch Inspection

WARNING: This page is about a different car, the 2021 Hyundai Kona. However, it is still accessible from the selected car via links, so may be relevant.
Item Normal Value Prerequisite Condition Probe (+) Probe (-)
Switch: Resistance Less than 1.0 Ω
  1. Ignition Switch: OFF
  2. ESP Switch Connector: Disconnected
  3. ESP switch: ON
ESP OFF Switch (+) Terminal ESP OFF Switch (-) Terminal
  1. Is the result within specifications?

    YES 

    • Fault is intermittent caused by poor connection in ESP OFF switch harness and/or ESP (ESC)'s connector. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    • Replace it with a new ESP OFF switch and see if it properly operates. If the problem is cleared, put the new ESP OFF switch in place and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.