Code
C1354
HYUNDAI
C — Chassis
Right Rear Low Frequency Initiator Open/Short Failure | Pressure sensor (Wh1) - other
Views:
UK: 20
EN: 26
RU: 16
AI status
Completed
Completed
100%
Causes
- Broken or chafed wiring in right-rear sensor circuit
- Corroded, bent or pushed-out connector pins at sensor or ECU
- Failed right-rear pressure sensor (Wh1) or low-frequency initiator element
- Intermittent connector contact due to contamination or poor mating
- Faulty ABS/ESC hydraulic control unit or ECU driver circuit (less common)
- Aftermarket repairs or body damage affecting harness routing
Symptoms
- ABS/ESC warning lamp illuminated
- Possible reduced braking/traction control functionality or degraded stability control
- Stored DTC(s) related to right-rear wheel or pressure sensor
- Intermittent faults that may appear under suspension movement or after wet conditions
What to check
- Read freeze frame data and full DTC list with a capable scan tool
- Visually inspect right-rear sensor, connector and wiring harness for damage, corrosion or water ingress
- Check for service bulletins or harness routing notes for this model/year
- Perform wiggle / suspension travel test while monitoring live data to reproduce intermittent fault
Signal parameters
- Supply/reference present at sensor connector (typically a 5V reference or system-specific supply; some systems use 12V for pressure sensors)
- Signal should change with wheel rotation or pressure changes (voltage or low-frequency waveform)
- No continuity to ground or permanent short to battery voltage when measured from sensor signal line
- Connector pin integrity: no loose or pushed-out pins
Diagnostic algorithm
- Connect a manufacturer-level scan tool, confirm C1354 and capture freeze-frame/live data for right-rear sensor or pressure circuit
- Visually inspect right-rear sensor, pigtail and harness routing for chafe, corrosion, impact or water entry; repair visible damage
- Disconnect connector at sensor; inspect pins for corrosion, bent or pushed-out terminals and for presence of moisture; clean and repair as needed
- With ignition on, measure supply/reference voltage at sensor connector (backprobe) and compare to manufacturer specification
- Measure sensor signal with wheel rotated (for wheel-initiator) or with applied hydraulic pressure (for pressure sensor) using a multimeter or oscilloscope; look for expected changing waveform or voltage
- Check resistance of sensor element (if manufacturer spec available) for open circuit or short to ground/battery
- Perform continuity check from sensor connector to the ECU/ABS module connector for breaks or shorts; repair any harness faults found
- If wiring, connector and power/reference check good but sensor signal is still out-of-spec, replace the right-rear sensor (or pressure sensor Wh1) and retest
- If new sensor still shows the fault, suspect module driver failure; confirm with scope and consider replacement of ABS/ESC hydraulic unit or ECU only after verifying harness and sensor faults cannot be found
- After repair, clear codes, test-drive and re-scan to confirm code does not return
Likely causes
- Water intrusion/corrosion at the right-rear sensor connector
- Damaged harness where it bends at suspension or near wheel well
- Failed sensor element (open or short internally)
- Pin pushed out or shorted in junction connector or ABS module plug
Fault status
Status
Right Rear Low-Frequency Initiator / Pressure Sensor (Wh1) circuit open or short detected. Check sensor, connector and wiring.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
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