B145E

Code

LAND ROVER B — Body

Proximity sensor power supply - Circuit 2 Trunk control module circuit 2

Brand: LAND ROVER

Type: B — Body

Views: UK: 17 EN: 15 RU: 12

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Page language: EN

Causes

Open or short in proximity sensor power supply wiring (circuit 2)
Poor or corroded connector at the sensor or trunk control module
Failed proximity sensor (internal short/open)
Faulty trunk control module (TCM) power driver or circuit
Blown fuse or faulty fuse connection supplying the module/sensor
Water ingress or physical damage to sensor or wiring

Symptoms

Trunk proximity sensor 2 not responding or erratic
Trunk open/close functions unreliable or not working
DTC B145E stored and possible accompanying warning messages
Intermittent trunk operation when moving/handling harness
Other trunk accessories behaving abnormally (lighting, latches)

What to check

Read stored codes and freeze-frame data with a compatible scan tool
Visually inspect sensor, wiring harness, grommets and connectors for damage or water
Check relevant fuses and power distribution for the trunk control module
Backprobe sensor connector and trunk control module connector for supply and ground with key ON
Perform wiggle/strain test on harness to reproduce fault
Disconnect sensor to see if code changes (isolate sensor vs module)

Signal parameters

Reference/power supply to proximity sensor (typical): ~5 V reference or as specified by OEM — verify with wiring diagram
Battery system voltage with engine OFF/ON: ~11–14 V
Expected continuity: supply circuit should not be open; resistance to ground should be low where applicable
No short to ground or short to battery positive on the sensor supply circuit

Diagnostic algorithm

Retrieve DTCs and any related codes; record freeze-frame data.
Visually inspect sensor 2, connector, harness routing near trunk and liftgate for damage, corrosion or water entry.
Verify fuses and power feeds to trunk control module; repair any blown/loose fuses.
With ignition ON, backprobe the sensor 2 power pin and measure supply voltage. Compare to OEM expected value from wiring diagram.
Check sensor ground continuity to chassis ground; measure voltage drop while operating or wiggling harness.
Check for short to ground or short to battery: measure resistance from supply pin to ground and to battery positive with battery disconnected.
Disconnect sensor 2 and clear codes. If code does not return, suspect the sensor or its immediate wiring/connector; if code returns with sensor disconnected, suspect wiring or trunk control module.
If wiring and connectors test good, substitute a known-good sensor (if available) or repair/replace sensor and retest.
If problem persists after sensor and wiring repair, inspect/replace trunk control module or have module bench-tested; check for software updates or TSBs before replacement.
After repair, clear codes and perform function test and road/operation verification to ensure code does not return.

Likely causes

Damaged/shorted wiring or pin-stressed connector at trunk area (most common)
Corroded/contaminated connector causing intermittent supply
Failed proximity sensor on circuit 2
Faulty trunk control module driver or internal fault (less common)

Fault status

⚠️ Status

Trunk control module detected fault on proximity sensor power supply circuit 2 — open/short/low supply or intermittent connection.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours

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B145E — Proximity sensor power supply - Circuit 2 Trunk control module circuit 2