Code
C162385
HYUNDAI
C — Chassis
CAN Time-out Steering Angle Sensor
AI status
Completed
Completed
100%
Causes
- Open or short in CANH/CANL wiring between SAS and CAN network
- Loose, corroded or damaged connector at the steering angle sensor or BCM
- Failed steering angle sensor (SAS) module
- Faulty clockspring/spiral cable or damaged steering column wiring
- Blown fuse or loss of power/ground to the SAS
- Intermittent or dominant CAN bus fault (short to Vb or ground)
Symptoms
- Steering angle data unavailable or incorrect in vehicle systems
- Warning lights illuminated (ESC, ABS, VSM, or steering-related warnings)
- Vehicle stability/traction control disabled or degraded
- Steering-related features (lane-keeping, adaptive systems) not available
- Fault stored in vehicle diagnostic memory; possible limp/limited functionality of stability systems
What to check
- Read all modules with a capable scan tool; confirm C162385 and note freeze-frame/data and whether SAS appears on network
- Check for additional U0xxx or C16xxx communication codes (gateway/BCM issues)
- Visually inspect SAS connector, steering column harness, and clockspring for damage or corrosion
- Confirm fuses and power/ground at SAS connector with ignition ON and key OFF as required by OEM
- Measure CANH and CANL voltages at SAS connector with a multimeter/scope (see signal_params)
- Perform resistance check across CANH-CANL with ignition off to verify termination (~60 ohms)
Signal parameters
- CANH idle ≈ 2.5 V; CANL idle ≈ 2.5 V. During bus activity CANH typically rises ≈ +1 V and CANL falls ≈ −1 V relative to idle (so differential swings ~2 V)
- Resistance across CANH–CANL with ignition OFF ≈ 60 Ω (two 120 Ω terminators in parallel)
- Expected message presence: steering angle messages are periodically broadcast — absence indicates timeout (use OEM scan tool to view message rate)
- Supply voltage to SAS (check vehicle-specific harness, typically ignition-switched 12 V)
- Ground continuity from SAS ground pin to chassis ground should be low (near 0 Ω)
Diagnostic algorithm
- Connect full-function scan tool and confirm C162385; record freeze-frame, module list and any related U/C codes.
- Attempt to communicate directly with the steering angle sensor module. If the module is reachable, view live steering angle messages and compare to expectations.
- Inspect visually: connectors, pin damage, corrosion, steering column harness, and clockspring/spiral cable condition. Repair/secure any obvious faults.
- Verify power and ground at the SAS connector (with ignition ON per OEM procedure). Replace or repair blown fuses or poor grounds.
- Measure CANH and CANL at the SAS connector with ignition ON: verify idle voltages (~2.5 V each) and that bus activity occurs when other modules talk. If both lines are shorted to battery or ground, trace and repair.
- With ignition OFF, measure resistance across CANH–CANL; expect about 60 Ω. If open or very high, suspect open circuit/connector. If very low (
- Use an oscilloscope to check CAN waveforms while exercising systems that should broadcast steering angle. Look for missing messages, excessive noise, dominant bus state, or corrupted frames.
- Wiggle-test harness/clock spring/steering wheel while monitoring live data to locate intermittent breaks; repair wiring or replace clockspring as required. Take airbag/steering wheel safety precautions when servicing the clockspring.
- If wiring/power/ground and bus integrity are confirmed, consider SAS module internal failure—replace module per OEM procedure and perform any required calibration/relearn of steering angle and stability systems.
- After repairs, clear codes, perform relearn/calibration procedures required by the manufacturer, and road test while monitoring live data to confirm no recurrence.
Likely causes
- Damaged/poor connector at SAS or steering column (common)
- Broken or chafed CAN pair inside steering column / clockspring (common with steering wheel work)
- Failed steering angle sensor module
- Open/shorted CAN bus caused by aftermarket device or recent repair
- Missing power or blown fuse to SAS
Fault status
Status
CAN Time-out — Steering Angle Sensor (C162385): The vehicle detected no CAN bus messages from the steering angle sensor module within the expected time window. Check CAN bus wiring, power/ground, connectors, clockspring, and module communication.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
Similar codes
Repair manuals
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