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Home / DTC / C242D00 — PSB RH Motor Wire Short to GND

C242D00 — PSB RH Motor Wire Short to GND

Detailed page for trouble code C242D00.

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Code

C242D00

HYUNDAI C — Chassis

PSB RH Motor Wire Short to GND

Brand: HYUNDAI
Type: C — Chassis
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Page language: EN

Causes

  • Damaged or chafed wiring harness where the RH motor control wire contacts chassis ground
  • Corroded, bent or pushed-back connector terminals at the motor or control module
  • Shorted motor (internal winding insulation failure) creating a path to ground
  • Faulty motor control module or driver transistor inside the module
  • Aftermarket modification or pinch point causing wire to contact metal
  • Moisture or contamination in connector creating low resistance to ground

Symptoms

  • Right-hand PSB motor will not operate (no movement or intermittent operation)
  • DTC C242D00 stored and possibly illuminated warning indicator related to the system
  • Blown fuse related to the motor circuit in some cases
  • Unusual noises or single-stroke attempts from the RH motor when commanded
  • Unexpected battery drain or parasitic draw if short is permanent

What to check

  • Read and record stored DTCs and freeze-frame data with a scan tool; clear codes and attempt to re-create
  • Visual inspection of RH motor wiring, protective sleeving, and routing near hinges or moving joints
  • Inspect and reseat connectors at the motor and at the control module; check for corrosion, bent pins or pushed-out terminals
  • Check related fuses/relays for open or evidence of overheating
  • Measure voltage at the motor connector while commanding the motor with a scan tool (backprobe) and observe behavior
  • Check continuity from suspected motor control wire to chassis ground with connector disconnected

Signal parameters

  • When commanded ON: motor drive line voltage should switch between battery voltage and ground (or PWM duty) as defined by the module; a constant near 0 V on both lines indicates a short to ground
  • Idle/no-command (rest): motor control line should be open/high-impedance (no direct short to ground); continuity to ground should be high (OL or >> kilo-ohms)
  • Motor coil DC resistance (typical small DC motors): low ohm value (usually a few ohms); check service data for exact spec — a near-zero or near-infinite reading suggests fault
  • Insulation resistance from motor windings to motor case should be very high (no low-resistance path to ground)

Diagnostic algorithm

  1. Use a scan tool to confirm C242D00 and note any additional related codes. Clear codes and attempt to activate the RH PSB motor while watching for code return.
  2. Perform a careful visual inspection of the RH motor harness from the motor to the module (including through seat/door/tailgate paths). Look for rub-throughs, pinches, crushed sections, or corrosion.
  3. Disconnect the RH motor connector. With the key ON (or as required by service procedure), measure continuity from the motor control wires at the harness side to chassis ground. If low resistance to ground is present on a control wire with the motor disconnected, isolate and repair wiring.
  4. Measure motor coil resistance at the disconnected motor connector. Compare to OEM spec. Check insulation between windings and motor case; a low value indicates internal motor short to ground — replace motor if confirmed.
  5. Backprobe and observe voltage on the motor control lines while commanding the motor with a scan tool. If the control module output is shorted to ground (unable to switch or very low voltage on both lines), consider module driver fault.
  6. Wiggle harness while monitoring continuity/voltage to reproduce intermittent short. Inspect any points where the harness passes through metal edges or pivots.
  7. If wiring appears intact and motor checks good, test or substitute the control module (or motor driver) per OEM procedures. Replace or repair damaged wiring, connectors, or motor as indicated.
  8. After repair, clear codes and verify proper operation through several activation cycles and road/functional tests to ensure the fault does not return.

Likely causes

  • Wiring abrasion at a harness grommet or hinge (doors, seats, tailgate) where wires flex
  • Connector terminal pushed out or corroded at the RH motor harness
  • Motor internals failed and are shorted to the motor case (ground)
  • Control module driver stage damaged from prior short or overload

Fault status

⚠️ Status
Right-hand PSB motor circuit detected as short to chassis ground. Control module detected low/shorted voltage on RH motor drive line.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

U0121 P0627
371

Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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