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Home / DTC / U0229 — Lost Communication With Heated Steering Wheel Module

U0229 — Lost Communication With Heated Steering Wheel Module

Detailed page for trouble code U0229.

34,536codes
59brands
11,925generic
22,611specific
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Code

U0229

Generic U — Network/User

Lost Communication With Heated Steering Wheel Module

Brand: Generic
Type: U — Network/User
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse or loss of module supply power
  • Poor or lost ground at the HSW module
  • Damaged or corroded connector or wiring to the HSW module
  • Open or shorted CAN bus wiring (CAN High/CAN Low) between the HSW module and the rest of the network
  • Failed HSW module
  • Missing or corrupted module software / required reflash

Symptoms

  • Heated steering wheel does not turn on
  • Steering wheel heat indicator or message on instrument cluster
  • U0229 stored in body control or gateway module freeze frame
  • Possible multiple network-related warnings or limited functionality of related systems
  • Intermittent operation of steering wheel heater (may work sometimes)

What to check

  • Use a scanner to read all stored and pending DTCs and freeze frame data from BCM/gateway and HSW module if accessible
  • Check battery voltage and fuses for steering column/body modules
  • Visually inspect connectors at the heated steering wheel module and steering column for corrosion, damage or loose pins
  • Verify good ground(s) for the HSW module (continuity to chassis)
  • Check CAN bus wiring for physical damage, chafing, or pinched sections along harness routes
  • Measure CAN bus voltages with key on, engine off: verify expected idle voltages and compare both sides of the harness

Signal parameters

  • CAN bus idle voltages (approx. recessive levels near vehicle nominal reference; verify against OEM spec)
  • CAN differential voltage under dominant vs recessive states (should switch when commands are sent)
  • Module supply voltage (12V nominal with key on / accessory)
  • Module ground continuity to chassis
  • Presence of wake-up messages and module response intervals on the CAN bus
  • Bus error counters or fault frames reported by gateway/BCM (if available)

Diagnostic algorithm

  1. Record all codes and freeze-frame data from gateway/BCM and related modules. Note whether U0229 is current, pending, or history.
  2. Attempt to communicate with the heated steering wheel module using an OEM-level scan tool. If the tool can’t see the module, confirm if other modules are reachable.
  3. Inspect fuses and measure module supply voltage at the connector with ignition on. Repair/replace blown fuses and restore proper supply if missing.
  4. With battery disconnected for safety, visually inspect module connector and wiring for damage, corrosion, bent pins, or water intrusion. Repair or replace harness/connector as needed.
  5. Restore battery, verify good ground(s) from the module to chassis (low resistance), and re-check supply voltage under load.
  6. Probe CAN_H and CAN_L at the module connector with ignition on. Compare voltages to the other end of the harness and to OEM reference. Look for open, short to ground/battery, or stuck dominant state.
  7. Measure termination resistance across CAN_H and CAN_L (when ignition off and battery disconnected or with modules asleep per OEM procedure). Expected combined termination ≈ 60 ohms (varies by vehicle).
  8. If wiring and power/ground are good but module is non-responsive, try to reflash or reprogram module software per OEM procedure, or perform a module reset if supported.
  9. If a spare/known-good HSW module is available, bench test or swap to confirm module failure before replacement.
  10. After repairs, clear codes, perform communication and function tests (operate heated steering wheel), and road test to confirm fault does not return. Document findings and any parts replaced.
  11. Safety note: When working in the steering column area, follow vehicle-specific procedures to prevent deployment of supplemental restraint systems and to maintain steering angle calibration if removed.

Likely causes

  • Connector corrosion, bent pins or loose connection at the HSW module
  • Blown fuse or poor battery/ignition supply to the module
  • Intermittent or shorted CAN wiring near the steering column
  • Failed HSW module electronics
  • Wake-up message not being received from the BCM or gateway

Fault status

⚠️ Status
Lost Communication With Heated Steering Wheel Module — module not responding on vehicle network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

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Code

U0229

HYUNDAI U — Network/User

Lost Communication With Heated Steering Wheel Module

Brand: HYUNDAI
Type: U — Network/User
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse or loss of module supply power
  • Poor or lost ground at the HSW module
  • Damaged or corroded connector or wiring to the HSW module
  • Open or shorted CAN bus wiring (CAN High/CAN Low) between the HSW module and the rest of the network
  • Failed HSW module
  • Missing or corrupted module software / required reflash

Symptoms

  • Heated steering wheel does not turn on
  • Steering wheel heat indicator or message on instrument cluster
  • U0229 stored in body control or gateway module freeze frame
  • Possible multiple network-related warnings or limited functionality of related systems
  • Intermittent operation of steering wheel heater (may work sometimes)

What to check

  • Use a scanner to read all stored and pending DTCs and freeze frame data from BCM/gateway and HSW module if accessible
  • Check battery voltage and fuses for steering column/body modules
  • Visually inspect connectors at the heated steering wheel module and steering column for corrosion, damage or loose pins
  • Verify good ground(s) for the HSW module (continuity to chassis)
  • Check CAN bus wiring for physical damage, chafing, or pinched sections along harness routes
  • Measure CAN bus voltages with key on, engine off: verify expected idle voltages and compare both sides of the harness

Signal parameters

  • CAN bus idle voltages (approx. recessive levels near vehicle nominal reference; verify against OEM spec)
  • CAN differential voltage under dominant vs recessive states (should switch when commands are sent)
  • Module supply voltage (12V nominal with key on / accessory)
  • Module ground continuity to chassis
  • Presence of wake-up messages and module response intervals on the CAN bus
  • Bus error counters or fault frames reported by gateway/BCM (if available)

Diagnostic algorithm

  1. Record all codes and freeze-frame data from gateway/BCM and related modules. Note whether U0229 is current, pending, or history.
  2. Attempt to communicate with the heated steering wheel module using an OEM-level scan tool. If the tool can’t see the module, confirm if other modules are reachable.
  3. Inspect fuses and measure module supply voltage at the connector with ignition on. Repair/replace blown fuses and restore proper supply if missing.
  4. With battery disconnected for safety, visually inspect module connector and wiring for damage, corrosion, bent pins, or water intrusion. Repair or replace harness/connector as needed.
  5. Restore battery, verify good ground(s) from the module to chassis (low resistance), and re-check supply voltage under load.
  6. Probe CAN_H and CAN_L at the module connector with ignition on. Compare voltages to the other end of the harness and to OEM reference. Look for open, short to ground/battery, or stuck dominant state.
  7. Measure termination resistance across CAN_H and CAN_L (when ignition off and battery disconnected or with modules asleep per OEM procedure). Expected combined termination ≈ 60 ohms (varies by vehicle).
  8. If wiring and power/ground are good but module is non-responsive, try to reflash or reprogram module software per OEM procedure, or perform a module reset if supported.
  9. If a spare/known-good HSW module is available, bench test or swap to confirm module failure before replacement.
  10. After repairs, clear codes, perform communication and function tests (operate heated steering wheel), and road test to confirm fault does not return. Document findings and any parts replaced.
  11. Safety note: When working in the steering column area, follow vehicle-specific procedures to prevent deployment of supplemental restraint systems and to maintain steering angle calibration if removed.

Likely causes

  • Connector corrosion, bent pins or loose connection at the HSW module
  • Blown fuse or poor battery/ignition supply to the module
  • Intermittent or shorted CAN wiring near the steering column
  • Failed HSW module electronics
  • Wake-up message not being received from the BCM or gateway

Fault status

⚠️ Status
Lost Communication With Heated Steering Wheel Module — module not responding on vehicle network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

U0100 U0121 U0142 U0164 U0231 U0240
371

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

HYUNDAI

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

U0229

LAND ROVER U — Network/User

Lost communication with the heated steering wheel module

Brand: LAND ROVER
Type: U — Network/User
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Blown fuse or loss of module supply power
  • Poor or lost ground at the HSW module
  • Damaged or corroded connector or wiring to the HSW module
  • Open or shorted CAN bus wiring (CAN High/CAN Low) between the HSW module and the rest of the network
  • Failed HSW module
  • Missing or corrupted module software / required reflash

Symptoms

  • Heated steering wheel does not turn on
  • Steering wheel heat indicator or message on instrument cluster
  • U0229 stored in body control or gateway module freeze frame
  • Possible multiple network-related warnings or limited functionality of related systems
  • Intermittent operation of steering wheel heater (may work sometimes)

What to check

  • Use a scanner to read all stored and pending DTCs and freeze frame data from BCM/gateway and HSW module if accessible
  • Check battery voltage and fuses for steering column/body modules
  • Visually inspect connectors at the heated steering wheel module and steering column for corrosion, damage or loose pins
  • Verify good ground(s) for the HSW module (continuity to chassis)
  • Check CAN bus wiring for physical damage, chafing, or pinched sections along harness routes
  • Measure CAN bus voltages with key on, engine off: verify expected idle voltages and compare both sides of the harness

Signal parameters

  • CAN bus idle voltages (approx. recessive levels near vehicle nominal reference; verify against OEM spec)
  • CAN differential voltage under dominant vs recessive states (should switch when commands are sent)
  • Module supply voltage (12V nominal with key on / accessory)
  • Module ground continuity to chassis
  • Presence of wake-up messages and module response intervals on the CAN bus
  • Bus error counters or fault frames reported by gateway/BCM (if available)

Diagnostic algorithm

  1. Record all codes and freeze-frame data from gateway/BCM and related modules. Note whether U0229 is current, pending, or history.
  2. Attempt to communicate with the heated steering wheel module using an OEM-level scan tool. If the tool can’t see the module, confirm if other modules are reachable.
  3. Inspect fuses and measure module supply voltage at the connector with ignition on. Repair/replace blown fuses and restore proper supply if missing.
  4. With battery disconnected for safety, visually inspect module connector and wiring for damage, corrosion, bent pins, or water intrusion. Repair or replace harness/connector as needed.
  5. Restore battery, verify good ground(s) from the module to chassis (low resistance), and re-check supply voltage under load.
  6. Probe CAN_H and CAN_L at the module connector with ignition on. Compare voltages to the other end of the harness and to OEM reference. Look for open, short to ground/battery, or stuck dominant state.
  7. Measure termination resistance across CAN_H and CAN_L (when ignition off and battery disconnected or with modules asleep per OEM procedure). Expected combined termination ≈ 60 ohms (varies by vehicle).
  8. If wiring and power/ground are good but module is non-responsive, try to reflash or reprogram module software per OEM procedure, or perform a module reset if supported.
  9. If a spare/known-good HSW module is available, bench test or swap to confirm module failure before replacement.
  10. After repairs, clear codes, perform communication and function tests (operate heated steering wheel), and road test to confirm fault does not return. Document findings and any parts replaced.
  11. Safety note: When working in the steering column area, follow vehicle-specific procedures to prevent deployment of supplemental restraint systems and to maintain steering angle calibration if removed.

Likely causes

  • Connector corrosion, bent pins or loose connection at the HSW module
  • Blown fuse or poor battery/ignition supply to the module
  • Intermittent or shorted CAN wiring near the steering column
  • Failed HSW module electronics
  • Wake-up message not being received from the BCM or gateway

Fault status

⚠️ Status
Lost Communication With Heated Steering Wheel Module — module not responding on vehicle network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

U0100 U0121 U0142 U0164 U0231 U0240
413

Browse 413 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

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