Code
U2014
LAND ROVER
U — Network/User
Hardware of control module
Views:
UK: 4
EN: 8
RU: 3
AI status
Completed
Completed
100%
Causes
- Internal electronic component failure inside the control module (CPU, power regulators, memory).
- Corrosion, water ingress, or physical damage to the module housing or PCB.
- Loss of supply or ground due to connector damage, blown fuse, or wiring fault.
- Electrical overstress from a jump start, high-voltage event, or short circuit.
- Faulty or interrupted communication on vehicle networks (CAN/LIN) due to module hardware.
- Corrupt or failed firmware that prevents normal hardware initialization.
Symptoms
- One or more related systems inoperative or intermittent (depends on which module).
- Malfunction indicator lamp(s) or module-specific warning messages on dash.
- Loss of communication with the affected module on diagnostic scan tool.
- Related network errors such as CAN bus faults or timeouts.
- Vehicle may enter limp mode, fail to start, or exhibit degraded functionality.
- Module may fail self-tests on power-up or immediately set U2014 again after clear.
What to check
- Read all stored DTCs and freeze frame data from all modules; note occurrence history and related U-codes.
- Visually inspect the suspect module for water ingress, corrosion, melted plastic, or impact damage.
- Check module connectors: secure fit, bent pins, corrosion and apply dielectric grease as per tech data.
- Verify vehicle battery voltage (12.6 V at rest) and system voltage while cranking; check for voltage dips.
- Check fuses and relays supplying the module and any ignition-switched supply circuits.
- Measure supply and ground at the module connector (battery positive, ignition-switched, chassis ground).
Signal parameters
- Battery supply voltage to module (VBatt) — nominal ~12–14.5 V depending on charging.
- Ignition-switched supply (IG) — present with key ON/engine running as specified by vehicle data.
- Module ground resistance — low (< 1 Ω) to chassis ground; high resistance indicates poor ground.
- Module internal reference rails — typical 5.0 V or 3.3 V (verify against service data).
- CAN bus differential voltages — recessive ~2.5 V each line, dominant differential ~1–2 V; check bus termination ~60 Ω between CAN_H and CAN_L.
- LIN bus levels and wake/sleep signal patterns (if applicable).
Diagnostic algorithm
- Capture and record all codes from all control modules, including freeze-frame, occurrence count and pattern (permanent, intermittent).
- Attempt a code clear and perform a controlled road test or power cycle to see if U2014 returns and under what conditions.
- Inspect the module and connector for corrosion, moisture, or mechanical damage. Repair or replace damaged connector/repair harness as needed.
- Verify supply and ground at the module connector with a multimeter. Repeat measurements under load/with key ON and during cranking.
- Check fuses and relays related to the module power feed. Replace any faulty items and re-test.
- Check vehicle network integrity: measure CAN_H/CAN_L with an oscilloscope if available, confirm correct idle waveforms and proper termination resistance.
- If power, ground and network are good, attempt software/firmware reflash or module reset using approved Land Rover diagnostic tools following factory procedures.
- If reflash fails or U2014 persists and hardware symptoms remain, consider module replacement. Before replacement, back up module configuration/data where required and confirm correct part number and software level.
- After repair or replacement, program/initialize the replacement module per manufacturer procedure and verify that all related systems function and codes do not return.
- If problem persists after module replacement, continue troubleshooting wiring, shared power/ground circuits and related modules on the same network.
Likely causes
- Failed voltage regulator or internal power rail on the module (3.3 V / 5 V) causing internal faults.
- Damaged or corroded connector pins causing intermittent supply/ground or CAN/LIN connection.
- PCB damage (cracked board, lifted traces) from impact or moisture.
- EEPROM or flash memory failure that prevents normal booting.
- Transient over-voltage event damaging internal components.
- Module temperature sensors or watchdog circuits triggering hardware fault.
Fault status
Status
Control module reports an internal hardware fault. Module failed self-test or detected internal electrical/PCB/component failure; device may be non-functional or intermittent.
Repair difficulty: Hard
Diagnostic time: 2-4 hours
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Code
U2014
Other
U — Network/User
Audio Subwoofer Unit is Not Responding
Views:
UK: 16
EN: 25
RU: 16
AI status
Completed
Completed
100%
Causes
- Internal electronic component failure inside the control module (CPU, power regulators, memory).
- Corrosion, water ingress, or physical damage to the module housing or PCB.
- Loss of supply or ground due to connector damage, blown fuse, or wiring fault.
- Electrical overstress from a jump start, high-voltage event, or short circuit.
- Faulty or interrupted communication on vehicle networks (CAN/LIN) due to module hardware.
- Corrupt or failed firmware that prevents normal hardware initialization.
Symptoms
- One or more related systems inoperative or intermittent (depends on which module).
- Malfunction indicator lamp(s) or module-specific warning messages on dash.
- Loss of communication with the affected module on diagnostic scan tool.
- Related network errors such as CAN bus faults or timeouts.
- Vehicle may enter limp mode, fail to start, or exhibit degraded functionality.
- Module may fail self-tests on power-up or immediately set U2014 again after clear.
What to check
- Read all stored DTCs and freeze frame data from all modules; note occurrence history and related U-codes.
- Visually inspect the suspect module for water ingress, corrosion, melted plastic, or impact damage.
- Check module connectors: secure fit, bent pins, corrosion and apply dielectric grease as per tech data.
- Verify vehicle battery voltage (12.6 V at rest) and system voltage while cranking; check for voltage dips.
- Check fuses and relays supplying the module and any ignition-switched supply circuits.
- Measure supply and ground at the module connector (battery positive, ignition-switched, chassis ground).
Signal parameters
- Battery supply voltage to module (VBatt) — nominal ~12–14.5 V depending on charging.
- Ignition-switched supply (IG) — present with key ON/engine running as specified by vehicle data.
- Module ground resistance — low (< 1 Ω) to chassis ground; high resistance indicates poor ground.
- Module internal reference rails — typical 5.0 V or 3.3 V (verify against service data).
- CAN bus differential voltages — recessive ~2.5 V each line, dominant differential ~1–2 V; check bus termination ~60 Ω between CAN_H and CAN_L.
- LIN bus levels and wake/sleep signal patterns (if applicable).
Diagnostic algorithm
- Capture and record all codes from all control modules, including freeze-frame, occurrence count and pattern (permanent, intermittent).
- Attempt a code clear and perform a controlled road test or power cycle to see if U2014 returns and under what conditions.
- Inspect the module and connector for corrosion, moisture, or mechanical damage. Repair or replace damaged connector/repair harness as needed.
- Verify supply and ground at the module connector with a multimeter. Repeat measurements under load/with key ON and during cranking.
- Check fuses and relays related to the module power feed. Replace any faulty items and re-test.
- Check vehicle network integrity: measure CAN_H/CAN_L with an oscilloscope if available, confirm correct idle waveforms and proper termination resistance.
- If power, ground and network are good, attempt software/firmware reflash or module reset using approved Land Rover diagnostic tools following factory procedures.
- If reflash fails or U2014 persists and hardware symptoms remain, consider module replacement. Before replacement, back up module configuration/data where required and confirm correct part number and software level.
- After repair or replacement, program/initialize the replacement module per manufacturer procedure and verify that all related systems function and codes do not return.
- If problem persists after module replacement, continue troubleshooting wiring, shared power/ground circuits and related modules on the same network.
Likely causes
- Failed voltage regulator or internal power rail on the module (3.3 V / 5 V) causing internal faults.
- Damaged or corroded connector pins causing intermittent supply/ground or CAN/LIN connection.
- PCB damage (cracked board, lifted traces) from impact or moisture.
- EEPROM or flash memory failure that prevents normal booting.
- Transient over-voltage event damaging internal components.
- Module temperature sensors or watchdog circuits triggering hardware fault.
Fault status
Status
Control module reports an internal hardware fault. Module failed self-test or detected internal electrical/PCB/component failure; device may be non-functional or intermittent.
Repair difficulty: Hard
Diagnostic time: 2-4 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