U3007

Code

LAND ROVER U — Network/User

Input power of control module B

Brand: LAND ROVER

Type: U — Network/User

Views: UK: 30 EN: 74 RU: 34

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Page language: EN

Causes

Blown or corroded fuse or fusible link feeding the module
Faulty power relay or ignition-switched power source
Open, shorted, damaged, or corroded wiring or connectors in the module power feed or ground
Poor or high-resistance ground at module or chassis ground point
Battery low, weak, or poor terminal connection
Intermittent connection due to water intrusion or connector damage

Symptoms

Related subsystem inoperative (depends on what Control Module B controls)
Communication errors for the module on scan tool (no response or intermittent)
Multiple related DTCs stored
Vehicle may not start or certain features fail if module is critical
Possible instrument cluster warnings or lamp illumination
Intermittent operation of functions controlled by module

What to check

Verify vehicle battery voltage and state of charge; check battery terminals for tightness and corrosion
Read all stored DTCs and freeze frame data with a capable scan tool; note related communication codes
Visually inspect fuses, fusible links and power relays for the affected circuit
Inspect module connector for corrosion, bent pins, water ingress, or damage
Measure voltage at the module power pin(s) with key off/key on/engine run per service manual
Check module ground(s) for continuity to battery negative and low resistance (

Signal parameters

Battery voltage at rest: ~12.4–12.8 V (vehicle-specific acceptable range)
Battery/ignition-switched supply at module with key ON: ~11–14.5 V depending on engine running/charging
Ground continuity: low resistance (
Supply feed should be steady; no repeated voltage dropouts or large transients when key is ON
CAN bus idle voltages (if module communicates on CAN): CAN_H ~2.5–3.5 V, CAN_L ~1.5–2.0 V (varies by system) — tool-dependent values

Diagnostic algorithm

Connect a professional scan tool and record U3007 plus any related codes and freeze-frame data.
Verify battery health and charge; ensure battery terminals are clean and tight. If battery is weak, recharge and retest.
Inspect all fuses and fusible links for the affected power feed; replace any blown item and recheck for reoccurrence.
With key OFF and battery disconnected, visually inspect the wiring harness and connector at Control Module B for damage, corrosion, or water intrusion.
Reconnect battery. With a DVOM, measure voltage at the module power pin(s) with key OFF/ON/ENGINE RUN per the service manual. Confirm presence and stability of expected supply.
Measure resistance/continuity from module ground pins to battery negative. Repair or clean grounds if resistance is high.
If supply is missing, trace power feed back to the fuse/relay/ignition source checking continuity and voltage at intermediate points. Repair open or shorted wiring as found.
If power is present but intermittent, perform wiggle test on harness and connector while watching live data or voltage. Repair or replace connector/harness sections showing intermittent contact.
If wiring, fuses and grounds check good, compare module behavior by checking communication on CAN/LIN with a scope or bus monitor. If module shows no power but all supplies are correct, suspect internal module failure.
Follow vehicle manufacturer procedure for module replacement and programming if replacement is necessary. After repair, clear codes and verify system operation and that U3007 does not return.

Likely causes

Blown fuse or faulty relay supplying module power
Loose or corroded battery terminal or main power feed
High-resistance ground at module or nearby ground strap
Damaged power wire (pinched, chafed or disconnected) between fuse/relay and module
Intermittent connector contact (moisture/corrosion) at module
Failed Control Module B (less common — verify wiring/power first)

Fault status

⚠️ Status

Control Module B input power is missing, out of range, or intermittent. The module may be unpowered or unable to communicate; verify battery, fuses, relays, wiring, and grounds before replacing the module.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1-3 hours

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U3007 — Input power of control module B