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Home / DTC / C153286 — LKAS Switch Failure

C153286 — LKAS Switch Failure

Detailed page for trouble code C153286.

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Code

C153286

HYUNDAI C — Chassis

LKAS Switch Failure

Brand: HYUNDAI
Type: C — Chassis
Views: UK: 15 EN: 18 RU: 10
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Page language: EN

Causes

  • Faulty LKAS (lane-keeping) switch assembly
  • Damaged or corroded wiring or connector to the switch
  • Poor ground or power supply to the switch
  • Intermittent or lost CAN/serial communication between switch and LKAS/BCM/ECU
  • Software or calibration error in LKAS control module
  • Moisture or contamination inside switch or connector

Symptoms

  • LKAS unavailable or cannot be enabled from switch
  • LKAS warning lamp or message on instrument cluster
  • Switch press has no effect or erratic behavior (on/off not recognized)
  • Possible diagnostic trouble codes for CAN communication or other lane-keeping related faults
  • Reduced driver assistance functions (lane keep assist disabled)

What to check

  • Verify DTC with scan tool and record freeze frame/related codes
  • Check instrument cluster or message center for LKAS warnings
  • Visually inspect the LKAS switch, bezel and connector for damage or moisture
  • Check for loose connectors and poor contacts at switch and gateway/BCM
  • Confirm battery voltage and ground quality at the switch connector
  • Check for related CAN / LIN / serial communication DTCs (U0xxx class codes)

Signal parameters

  • Switch supply voltage: typically battery ~12 V (check spec for model/year)
  • Switch ground continuity: near 0 ohms to chassis ground
  • Switch output: logical on/off signal (voltage toggle or CAN message) — expected to switch between near 0 V and near battery voltage if hardwired
  • If CAN-based: message ID for LKAS switch and expected periodic message rate (e.g., present while ignition ON)
  • Resistance of switch contacts: low (single-digit ohms) when closed; open/infinite when open

Diagnostic algorithm

  1. Connect a manufacturer-level scan tool. Read and record C153286 and any other stored/active codes and freeze frame data. Note related communication codes (U-codes).
  2. Attempt to operate the LKAS switch while watching live data (switch state) on the scan tool. Confirm whether the control module receives the switch input.
  3. Perform a visual inspection of the switch, surrounding trim, and connector. Look for corrosion, bent pins, water ingress, or physical damage.
  4. With ignition OFF, disconnect the switch connector and inspect pins for damage/corrosion. Reconnect securely and check for proper retention.
  5. With appropriate safety and manufacturer guidance, measure supply voltage and ground at the switch connector with ignition ON. Compare to spec.
  6. Measure the signal line(s) while operating the switch. If the switch is hardwired, confirm the expected voltage change or continuity. If signal is CAN/LIN, monitor bus for the switch message and errors.
  7. Perform wiggle tests on the harness and connector while observing live data to check for intermittent faults.
  8. If wiring and connector checks are good but signal is missing or invalid, check for continuity between switch and receiving module (BCM/LKAS ECU). Repair any opens/shorts.
  9. If communication is present but the module reports internal switch failure, check for software updates or known TSBs. Reprogram or update module software if required.
  10. Replace the LKAS switch with a known-good unit if switch is confirmed faulty. After repair, clear DTCs and verify functionality and that the code does not return during road test.
  11. If code returns after switch replacement, inspect and test the LKAS/BCM module and bus termination; consider module replacement only after confirming wiring and power/ground.

Likely causes

  • Defective or worn LKAS switch (contacts or internal PCB failure)
  • Open, short, or high resistance in switch harness (power, ground or signal)
  • Connector pins pushed out, bent, or corroded at switch or gateway module
  • Loss of CAN bus communication (broken shield, short to battery, or bus termination issue)
  • Module software glitch or missing calibration

Fault status

⚠️ Status
LKAS switch input not detected or out of specification; lane keeping assist may be disabled.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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C1530 C1531 C1532 U0121 U0235
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