Home / DTC / C1353 — Left Rear LFI Open/Short | Left Rear Low Frequency Initiator Open/Short Failure | Pressure sensor (Wh1) - electrical | Right Rear Low Frequency Initiator Open/Short Failure

C1353 — Left Rear LFI Open/Short | Left Rear Low Frequency Initiator Open/Short Failure | Pressure sensor (Wh1) - electrical | Right Rear Low Frequency Initiator Open/Short Failure

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Code

C1353

HYUNDAI C — Chassis

Left Rear LFI Open/Short | Left Rear Low Frequency Initiator Open/Short Failure | Pressure sensor (Wh1) - electrical | Right Rear Low Frequency Initiator Open/Short Failure

Brand: HYUNDAI
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Page language: EN

Causes

  • Open, short or high-resistance wiring in the left rear LFI/sensor circuit
  • Corroded or loose connector at the left rear sensor or ABS unit
  • Damaged or contaminated left rear LFI / pressure sensor
  • Water intrusion or debris at sensor or connector
  • Faulty ABS/ESC control module or internal driver circuitry (less common)

Symptoms

  • ABS and/or VDC/ESC warning lamp illuminated
  • Traction control disabled or limited braking performance from rear circuits
  • ABS may not activate properly on rear wheel during hard braking
  • Possible stored ABS-related codes and freeze-frame data

What to check

  • Read and record all ABS/traction codes and freeze-frame data with a capable scanner
  • Visually inspect left rear wheel sensor, connector, and wiring harness for damage, corrosion, pin push-out, or water entry
  • Check connector mating surfaces for dirt, corrosion or bent pins
  • Perform wiggle test on harness while monitoring live data for dropouts
  • Measure sensor circuit resistance and compare to specification (open = infinite, short ≈ 0 Ω)
  • Measure supply/reference voltage and ground at the sensor connector (if active sensor)

Signal parameters

  • Open circuit: infinite resistance between sensor signal and ground/return
  • Short circuit: near 0 Ω between signal and ground or signal and +V
  • Passive (inductive) sensors: typical DC resistance often in the several hundred to low thousands of ohms (e.g., ~800–1500 Ω) — vehicle-specific
  • Active/Hall sensors: produce pulsed voltage signal (0.5–5 V) while wheel rotates; stable reference supply typically present when key on/crank
  • Expect a clean, repeatable waveform from the rotating wheel; excessive noise or no waveform indicates fault

Diagnostic algorithm

  1. Connect diagnostic scanner, record all ABS/traction codes and live data. Note freeze-frame.
  2. Visually inspect left rear sensor, mounting area, and wiring for damage, contamination, or incorrect orientation.
  3. Disconnect left rear sensor connector; inspect pins for corrosion, bent or pushed-out terminals; reconnect securely.
  4. With connector disconnected, measure resistance between sensor signal and reference/ground per service manual. Compare to expected range or look for open/short.
  5. With ignition ON (engine off) measure reference supply voltage and ground at the sensor connector (if applicable).
  6. If resistance and supply look correct, rotate the wheel by hand or drive slowly while monitoring live sensor data or scope waveform. Confirm signal presence and shape.
  7. Wiggle harness and connectors during testing to reproduce intermittent faults.
  8. Repair damaged wiring, replace connector terminals or sensor as indicated. Protect repaired harness from chafe and moisture.
  9. Clear codes, perform road test with ABS activation checks. Re-scan to confirm code does not return.
  10. If fault persists after sensor/wiring replacement, test or replace ABS/ESC control module per manufacturer procedures.

Likely causes

  • Wiring abrasion or chafed harness at suspension/wheel area causing intermittent open/short
  • Corroded/loose pin at the left rear sensor connector
  • Failed left rear LFI / pressure sensor
  • Contamination (rust/debris) preventing correct sensor operation

Fault status

⚠️ Status
Left Rear LFI Open/Short — electrical fault detected in left rear low-frequency initiator/pressure sensor circuit. ABS/ESC rear-wheel control may be disabled.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.8-2.0 hours

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