U2002

Code

LAND ROVER U — Network/User

General electrical failure of the switch

Brand: LAND ROVER

Type: U — Network/User

Views: UK: 14 EN: 16 RU: 14

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Page language: EN

Causes

Failed or intermittent switch internals (contacts or PCB)
Open or short in switch harness wiring
Corroded, loose, or damaged connector pins
Poor or missing ground or supply voltage to switch
Faulty body or gateway control module reading the switch
Software/firmware glitch or incorrect module programming

Symptoms

Related function(s) do not operate (e.g., windows, lights, locks, ignition depending on switch)
Intermittent operation of the affected function
Warning or message on dash regarding system fault
Related modules log additional communication or electrical DTCs
No response when actuating the switch or inconsistent behavior

What to check

Read and record all stored DTCs and freeze frame data with a diagnostic scan tool
Note whether code is current, intermittent, or history; clear code and attempt to reproduce
Visually inspect switch and nearby wiring for damage, corrosion, or water ingress
Inspect connectors for bent pins, corrosion, pushed-out terminals, and secure locking tangs
Backprobe switch connector while operating switch and measure supply, signal, and ground
Check vehicle battery voltage and ground integrity before and during testing

Signal parameters

Switch supply: typical 12 V (battery) present at connector with ignition on (measure 11–14 V)
Logic/signal line: many switches use a 5 V reference and produce a 0–5 V signal; closed/open states typically near 0 V or near reference (check service data)
Continuity when actuated: closed switch resistance typically
Ground: near 0 Ω to chassis ground when measured between switch ground terminal and known good chassis ground
CAN bus (if switch reports via gateway): bus idle differential ~2.5 V, single-wire modules as specified by manufacturer

Diagnostic algorithm

Connect an OEM-capable scan tool, read all U and B codes and freeze frame data; note event time and conditions
Clear U2002 and attempt to reproduce while monitoring live values related to the switch
Identify the exact switch specified in service information for U2002 on this model/year
Visually inspect the switch, surrounding trim, and harness; repair obvious damage
Backprobe the switch connector: verify reference supply, signal voltage, and ground while operating the switch—compare with expected values from service data
If supply or ground missing, trace and repair power/ground circuit to fuse/junction box; check related fuses and relays
If signal voltage does not change when operating switch but supply and ground are good, remove and bench-test the switch or substitute a known-good switch
If intermittent or only when harness is moved, perform wiggle test along harness path (hinge areas) to locate broken conductor; repair with solder and heat-shrink or replace wire/loom as required
Inspect and clean connector terminals; repair or replace connector pins/terminals if corroded or loose
If wiring and switch test good, check the receiving control module(s) for software updates or known issues; perform module reprogramming or reset per Land Rover service guidance
After repairs, clear codes and perform full function test and a road test or operation cycle to confirm the fault does not recur
Document repairs and advise customer if water damage or progressive wear is suspected

Likely causes

Corroded connector at switch or junction block
Broken wire at flex point (door hinge, steering column)
Failed switch contacts due to wear or moisture
Loose ground or low supply voltage to the switch circuit

Fault status

⚠️ Status

General electrical failure detected in switch circuit — check switch, wiring, connectors, power/ground, and receiving control module.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1-3 hours

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U2002 — General electrical failure of the switch