Code
U3006
Generic
U — Network/User
Control Module Input Power A Circuit/Open
Views:
UK: 17
EN: 29
RU: 24
AI status
Completed
Completed
100%
Causes
- Blown fuse or fusible link for the module power supply
- Disconnected, corroded, or damaged battery/ignition power wiring or connector
- Loose or poor battery connections or engine/chassis ground
- Intermittent or failed power distribution relay
- Faulty control module (internal power circuit failure)
- Aftermarket accessory or recent repair disturbed wiring
Symptoms
- Module-related systems inoperative or intermittent (instrument cluster features, body functions, drivability features depending on module)
- Illuminated warning lamps or multiple communication fault messages
- Stored module communication errors or other U-codes
- Vehicle may not start if a critical module loses power
- Random loss of functions controlled by the affected module
What to check
- Scan for related DTCs and note freeze-frame data and module presence on the network
- Measure battery voltage with key off and key on (nominal ~12.4–12.8 V resting, ~13.5–14.8 V charging)
- Verify continuity and voltage at the module power pin(s) with key ON (backprobe the connector where practical)
- Inspect and test fuses, fusible links, and power distribution relays feeding the module
- Visually inspect harness, pins and connector for corrosion, bent pins, burn, or water intrusion
- Check main battery positive and negative terminals and engine/chassis ground connections for tightness and corrosion
Signal parameters
- Module input power (Power A) expected: battery voltage present when key ON — typically 11–14.5 V
- Ignition-switched supply should be near battery voltage with key to RUN
- No-voltage/open = near 0 V at supply pin when it should be powered
- High-resistance condition may show voltage significantly lower than battery under load (voltage drop under 0.5–1.0 V is suspicious)
- Current draw: abnormal spikes or zero current if circuit open (requires clamp meter for in-circuit measurement)
Diagnostic algorithm
- Record scans: note U3006 freeze frame, related codes, and which module reported the fault.
- Check battery condition and terminal connections; charge or replace if low. Re-scan.
- Inspect fuses and fusible links in the power distribution center for the affected module; replace any blown items and re-test.
- With key ON, backprobe the module power (Input Power A) pin and verify expected voltage. If 0 V, trace back toward fuse/relay/battery to find open.
- Wiggle test connectors and wiring while monitoring voltage to find intermittent opens. Repair or secure damaged wiring/connectors.
- Check power distribution relay (if used) for proper operation and swap with known-good relay if appropriate.
- Verify grounds for the module and main chassis/engine grounds; clean and tighten as needed.
- If wiring and fuses are intact and proper voltage reaches the module but code persists, verify module ground return and consider replacing or reprogramming module per manufacturer procedure.
- After repairs, clear codes and perform functional test and road test as required to confirm the fault does not return.
Likely causes
- Open or corroded connector at the module power pin
- Blown main power fuse or fusible link feeding the module
- Broken wire or chafed harness on ignition-switched power circuit
- Weak or missing battery terminal/ground connection causing voltage drop
- Failed power distribution relay that supplies the module
Fault status
Status
Control Module Input Power A Circuit/Open — the control module detected an open or missing voltage on its primary power input (Input Power A). This indicates the module is not receiving expected supply voltage or there is an open/high-resistance condition in the power circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
Workshop Manuals
Available brands with manuals
2
AUDI 11
6-speed manual gearbox 0B1, front-wheel drive — Workshop Manual (Edition 05.2014)
Workshop Manual199,00 UAH
Audi A3 (1997) – 1.6L 4-cylinder (2‑valve) Engine Mechanical Components Service Manual (AEH, AKL, APF) – Edition 07.2002
Workshop Manual199,00 UAH
AUDI A3 (2004) Workshop Manual — 2.0L FSI Turbo (4‑cyl, 4‑valve) Engine, Mechanics — Edition 03.2017
Workshop Manual199,00 UAH
Audi A3 2004 — Electrical System (Workshop Manual, Edition 02.2018)
Workshop Manual199,00 UAH
Audi A4 / A4 Cabriolet – 4.2 l V8 (5‑valve, timing chains) – Workshop Manual (Mechanics) – Edition 04.2007
Workshop Manual199,00 UAH
Audi A4 / A4 Cabriolet — Auxiliary Heater Workshop Manual (Edition 08.2004)
Workshop Manual199,00 UAH
Audi A4 / A4 Cabriolet (1.8T 4‑cyl turbo) — Motronic Injection & Ignition System Service Manual (Edition 01.2015)
Workshop Manual199,00 UAH
Audi A8 (2003) — Electrical System Workshop Manual (Edition 08.2014)
Workshop Manual199,00 UAH
Audi Q4 e-tron (Type F4) - Self-study Programme SSP 685
Workshop Manual199,00 UAH
Audi Q8 (2018) — Electrical System Workshop Manual (Edition 05.2019)
Workshop Manual199,00 UAH
Audi Servicing Manual — 7‑Speed Dual Clutch Transmission 0CJ / 0CL / 0CK / 0DN / 0DP / 0HL (Edition 05.2018)
Workshop Manual199,00 UAH
LAND ROVER 3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
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
Code
U3006
HYUNDAI
U — Network/User
Control Module Input Power “A”
Views:
UK: 13
EN: 23
RU: 12
AI status
Completed
Completed
100%
Causes
- Blown fuse or fusible link for the module power supply
- Disconnected, corroded, or damaged battery/ignition power wiring or connector
- Loose or poor battery connections or engine/chassis ground
- Intermittent or failed power distribution relay
- Faulty control module (internal power circuit failure)
- Aftermarket accessory or recent repair disturbed wiring
Symptoms
- Module-related systems inoperative or intermittent (instrument cluster features, body functions, drivability features depending on module)
- Illuminated warning lamps or multiple communication fault messages
- Stored module communication errors or other U-codes
- Vehicle may not start if a critical module loses power
- Random loss of functions controlled by the affected module
What to check
- Scan for related DTCs and note freeze-frame data and module presence on the network
- Measure battery voltage with key off and key on (nominal ~12.4–12.8 V resting, ~13.5–14.8 V charging)
- Verify continuity and voltage at the module power pin(s) with key ON (backprobe the connector where practical)
- Inspect and test fuses, fusible links, and power distribution relays feeding the module
- Visually inspect harness, pins and connector for corrosion, bent pins, burn, or water intrusion
- Check main battery positive and negative terminals and engine/chassis ground connections for tightness and corrosion
Signal parameters
- Module input power (Power A) expected: battery voltage present when key ON — typically 11–14.5 V
- Ignition-switched supply should be near battery voltage with key to RUN
- No-voltage/open = near 0 V at supply pin when it should be powered
- High-resistance condition may show voltage significantly lower than battery under load (voltage drop under 0.5–1.0 V is suspicious)
- Current draw: abnormal spikes or zero current if circuit open (requires clamp meter for in-circuit measurement)
Diagnostic algorithm
- Record scans: note U3006 freeze frame, related codes, and which module reported the fault.
- Check battery condition and terminal connections; charge or replace if low. Re-scan.
- Inspect fuses and fusible links in the power distribution center for the affected module; replace any blown items and re-test.
- With key ON, backprobe the module power (Input Power A) pin and verify expected voltage. If 0 V, trace back toward fuse/relay/battery to find open.
- Wiggle test connectors and wiring while monitoring voltage to find intermittent opens. Repair or secure damaged wiring/connectors.
- Check power distribution relay (if used) for proper operation and swap with known-good relay if appropriate.
- Verify grounds for the module and main chassis/engine grounds; clean and tighten as needed.
- If wiring and fuses are intact and proper voltage reaches the module but code persists, verify module ground return and consider replacing or reprogramming module per manufacturer procedure.
- After repairs, clear codes and perform functional test and road test as required to confirm the fault does not return.
Likely causes
- Open or corroded connector at the module power pin
- Blown main power fuse or fusible link feeding the module
- Broken wire or chafed harness on ignition-switched power circuit
- Weak or missing battery terminal/ground connection causing voltage drop
- Failed power distribution relay that supplies the module
Fault status
Status
Control Module Input Power A Circuit/Open — the control module detected an open or missing voltage on its primary power input (Input Power A). This indicates the module is not receiving expected supply voltage or there is an open/high-resistance condition in the power circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 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
Code
U3006
LAND ROVER
U — Network/User
Module input power of Control A
Views:
UK: 9
EN: 20
RU: 8
AI status
Completed
Completed
100%
Causes
- Blown fuse or fusible link for the module power supply
- Disconnected, corroded, or damaged battery/ignition power wiring or connector
- Loose or poor battery connections or engine/chassis ground
- Intermittent or failed power distribution relay
- Faulty control module (internal power circuit failure)
- Aftermarket accessory or recent repair disturbed wiring
Symptoms
- Module-related systems inoperative or intermittent (instrument cluster features, body functions, drivability features depending on module)
- Illuminated warning lamps or multiple communication fault messages
- Stored module communication errors or other U-codes
- Vehicle may not start if a critical module loses power
- Random loss of functions controlled by the affected module
What to check
- Scan for related DTCs and note freeze-frame data and module presence on the network
- Measure battery voltage with key off and key on (nominal ~12.4–12.8 V resting, ~13.5–14.8 V charging)
- Verify continuity and voltage at the module power pin(s) with key ON (backprobe the connector where practical)
- Inspect and test fuses, fusible links, and power distribution relays feeding the module
- Visually inspect harness, pins and connector for corrosion, bent pins, burn, or water intrusion
- Check main battery positive and negative terminals and engine/chassis ground connections for tightness and corrosion
Signal parameters
- Module input power (Power A) expected: battery voltage present when key ON — typically 11–14.5 V
- Ignition-switched supply should be near battery voltage with key to RUN
- No-voltage/open = near 0 V at supply pin when it should be powered
- High-resistance condition may show voltage significantly lower than battery under load (voltage drop under 0.5–1.0 V is suspicious)
- Current draw: abnormal spikes or zero current if circuit open (requires clamp meter for in-circuit measurement)
Diagnostic algorithm
- Record scans: note U3006 freeze frame, related codes, and which module reported the fault.
- Check battery condition and terminal connections; charge or replace if low. Re-scan.
- Inspect fuses and fusible links in the power distribution center for the affected module; replace any blown items and re-test.
- With key ON, backprobe the module power (Input Power A) pin and verify expected voltage. If 0 V, trace back toward fuse/relay/battery to find open.
- Wiggle test connectors and wiring while monitoring voltage to find intermittent opens. Repair or secure damaged wiring/connectors.
- Check power distribution relay (if used) for proper operation and swap with known-good relay if appropriate.
- Verify grounds for the module and main chassis/engine grounds; clean and tighten as needed.
- If wiring and fuses are intact and proper voltage reaches the module but code persists, verify module ground return and consider replacing or reprogramming module per manufacturer procedure.
- After repairs, clear codes and perform functional test and road test as required to confirm the fault does not return.
Likely causes
- Open or corroded connector at the module power pin
- Blown main power fuse or fusible link feeding the module
- Broken wire or chafed harness on ignition-switched power circuit
- Weak or missing battery terminal/ground connection causing voltage drop
- Failed power distribution relay that supplies the module
Fault status
Status
Control Module Input Power A Circuit/Open — the control module detected an open or missing voltage on its primary power input (Input Power A). This indicates the module is not receiving expected supply voltage or there is an open/high-resistance condition in the power circuit.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
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