B1B24

Code

LAND ROVER B — Body

Key of identifier 22

Brand: LAND ROVER

Type: B — Body

Views: UK: 15 EN: 25 RU: 20

AI status

Completed

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Completed 100%

Page language: EN

Causes

Key transponder (remote key) not programmed or corrupted
Faulty key transponder or dead key battery
Antenna/coiled reader (immobiliser reader) fault or wiring problem
Body control / immobiliser module software or hardware fault
CAN or LIN communication fault between modules
Intermittent power/ground to immobiliser/reader

Symptoms

Engine will not start or cranks but does not run
Immobiliser / key warning lamp illuminated or flashing
Remote locking/unlocking or keyless entry functions not working
Intermittent recognition of key; starts sometimes, fails other times
Diagnostic tool shows key ID mismatch or unrecognised key entries

What to check

Scan vehicle with a dealer-level diagnostic tool; read all B and U codes and immobiliser status
Check the key battery voltage and replace if low
Try a known-good/spare programmed key to see if problem follows the key
Inspect antenna/reader connectors and wiring for damage and secure connections
Verify module power and ground voltages at the immobiliser/body control module
Check for recent module programming or software updates and relevant TSBs

Signal parameters

Key transponder ID reported by immobiliser (key ID register / list)
Antenna/reader coil signal strength or waveform when key presented
Immobiliser module supply voltage and ground status
CAN/LIN messages between immobiliser, body control module, and engine ECU (message presence and error counters)
Number of failed authentication attempts and timestamp

Diagnostic algorithm

Read and record all DTCs from immobiliser, body control module and engine ECU. Note freeze frame/occurrence data.
Verify key battery voltage and replace battery if below specification. Re-test with the same key.
Attempt to start using a confirmed-good programmed spare key. If spare works, suspect the original key.
Use diagnostic tool to read the stored key IDs. Confirm whether ID 22 is present, listed as unprogrammed, or flagged as invalid.
Inspect antenna/reader wiring and connectors (ignition barrel, steering column, mirror, or roof module depending on vehicle). Repair any damage and clear connector corrosion.
Use scope or diagnostic tool to monitor the RF/coil waveform while presenting the key; look for absent or noisy waveform.
Check immobiliser/module power and ground circuits for proper voltages and continuity to chassis ground.
If wiring and keys are OK, attempt key re-learn/ reprogramming per manufacturer procedure. Follow security steps and tool prompts.
If reprogramming fails or key ID table is corrupt, update module software/firmware per latest service information or perform module replacement if directed by manufacturer guidance.
Clear codes, retest multiple start cycles and verify remote/key functions. Document findings and any module updates.

Likely causes

Key battery low or key electronics failed
Key was not correctly programmed after replacement
Damaged or disconnected antenna coil at ignition barrel or mirror module
Faulty immobiliser/body control module or corrupted key table
Wiring chafe, short to ground, or poor connector at immobiliser unit
Module software mismatch or known software bug

Fault status

⚠️ Status

Stored when the immobiliser/body module detects that key identifier 22 is missing, unreadable, not programmed, or does not pass authentication during a key read attempt.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours

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Repair manuals

Manual library for LAND ROVER

320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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B1B24 — Key of identifier 22