B101C

Code

LAND ROVER B — Body

Switch of search

Brand: LAND ROVER

Type: B — Body

Views: UK: 20 EN: 38 RU: 24

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Page language: EN

Causes

Faulty search/seek switch (steering wheel or dash)
Damaged wiring or chafed insulation in switch circuit
Corroded or loose connector at switch or module
Poor ground or power supply to switch/module
Water ingress or contamination in switch assembly
Intermittent CAN/LIN communication fault with infotainment or BCM module

Symptoms

Search/seek function (radio/media) does not respond or works intermittently
Steering wheel audio/search buttons fail or operate inconsistently
Related infotainment features slow or non-responsive
Stored B101C DTC and possibly related comms/body codes
Function works sometimes and then fails, often after vibration or movement

What to check

Retrieve DTC with a scan tool and note freeze frame/tester data; clear code and attempt to reproduce
Visually inspect switch, steering wheel area, and wiring harness for damage, corrosion, or water ingress
Check connectors at the switch and the receiving module for bent pins, corrosion or poor retention
Verify vehicle battery voltage and ground integrity for the body/infotainment modules
Check for related communication U-codes (CAN/LIN) that might affect the switch signal

Signal parameters

Switch type: normally a momentary contact or resistive keypad feeding BCM/infotainment via LIN/CAN or direct digital input
Expected idle voltage: near 0 V on grounded contact or nominal module reference voltage when open (vehicle-specific)
Active signal: brief change to reference voltage or a LIN/CAN message when pressed (consult vehicle wiring/repair data for exact values)

Diagnostic algorithm

Use a factory-level scan tool to read B101C and any related codes; record conditions when code set (ignition state, accessory on, etc.).
Recreate the symptom: operate the search/seek switch while monitoring inputs with the scan tool to see if a switch event is registered.
Visually inspect switch and harness; unplug connector and inspect pins for corrosion, damage or water. Repair or clean as required.
With connector disconnected, check switch continuity or resistance when operating the switch (use service wiring diagram to identify correct pins). Replace switch if contacts do not change as specified.
Backprobe the harness at the module input and observe signal while pressing switch. If no change, trace wiring to the switch for opens/shorts, repair any broken conductors.
If wiring and switch check good, verify module ground/power and LIN/CAN communication. Use scope or multimeter to check signal integrity.
If module input shows intermittent behavior or communications errors persist, consider replacement or reprogramming of the affected control module per manufacturer procedure.
After repair, clear codes and test-drive/reproduce the function multiple times to confirm the fault is resolved.

Likely causes

Worn or stuck switch contacts preventing a clean signal
Connector pins pushed out or contaminated at the switch harness
Broken conductor inside the steering column ribbon cable or clock spring
Module input pin with intermittent connection or internal fault

Fault status

⚠️ Status

Search/seek switch circuit fault detected — input missing or invalid to control module.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-1.5 hours

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