Code
C242800
HYUNDAI
C — Chassis
PSB LH Motor Wire Short
Views:
UK: 13
EN: 12
RU: 11
AI status
Completed
Completed
100%
Causes
- Chafed or pinched wiring harness (short to ground or battery)
- Damaged motor internal short
- Corroded or damaged connector pins/terminals
- Water ingress or contamination in connector
- Poor or incorrect previous repair (pinched wire, incorrect routing)
- Blown/shorted inline fuse, relay, or wiring splice
Symptoms
- LH seat-back will not move or moves intermittently
- Fuses blowing or circuit breaker tripping when seat is operated
- Burning smell or heat near seat motor or wiring (in severe shorts)
- DTC stored and seat control may become disabled
- Possible battery drain if short persists
What to check
- Read and record all stored codes and freeze-frame data with a scan tool
- Visual inspection of LH seat wiring harness, especially at hinge points and under trim
- Inspect connector for corrosion, bent pins, or pushed-out terminals
- Check related fuses and seat motor circuit fuse for continuity or signs of overheating
- Disconnect LH motor connector and check motor resistance and continuity
- Measure voltage at motor connector while operating seat controls (observe for battery voltage or unexpected shorts)
Signal parameters
- Battery supply voltage to motor circuit when activated: approx. 12 V (vehicle-off 0–0.5 V depending on design)
- Motor coil DC resistance: typically low (single- to low-double-digit ohms); infinite/very high indicates open, very low or near 0 indicates short
- Control signal may be PWM: duty cycle varies with position/speed command; frequency typically hundreds of Hz (refer to service manual)
- No significant voltage (
Diagnostic algorithm
- Record codes, clear them, and attempt to re-create the fault while monitoring to verify repeatability.
- Visually inspect LH seat area, connectors, and harness routing (seat base, hinge area, under trim). Look for chafing, pinches, rodent damage, or water.
- With ignition off, disconnect the LH seat-back motor connector. Inspect connectors and pins for corrosion, melted plastic, or shorted pins.
- Measure motor coil resistance across motor terminals with connector disconnected. A very low resistance near 0 ohms suggests an internal short; infinite/high resistance suggests open circuit.
- Check for unintended continuity between motor positive terminal and ground, and between motor negative terminal and battery positive (short to power).
- Check fuses and any inline circuit protection. Replace any blown fuses only after confirming and fixing cause of short.
- With a helper operating seat controls, measure voltage at the motor connector while observing module output. If output is shorted to ground or to battery, locate short in harness between module and motor.
- Perform a wiggle/torque test along the harness while monitoring voltages/DTCs to find intermittent shorts from movement.
- If harness and connector check good but motor tests shorted, replace motor. If motor checks good but short persists, trace and repair wiring (repair, replace harness, or repair connector).
- If wiring and motor are good, suspect seat control module; verify inputs and outputs per service manual before replacing module.
- After repair, clear codes, verify seat function across full travel, and confirm no recurrence during road test or extended operation.
Likely causes
- Wiring harness damage at seat hinge or under trim where harness flexes
- Damaged or corroded connector at the LH seat motor
- Motor internal short (especially if motor ran hot or smelled)
- Short from accessory or improper aftermarket installation
Fault status
Status
C242800 — PSB LH Motor Wire Short: Short circuit detected in the left power seat back motor wiring. Inspect wiring, connectors and motor for shorts to power or ground.
Repair difficulty: Medium
Diagnostic time: 0.5-2 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email