B13DA

Code

LAND ROVER B — Body

supply Cabin ignition 2

Brand: LAND ROVER

Type: B — Body

Views: UK: 19 EN: 27 RU: 19

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Blown fuse or open fuse link for Cabin Ignition 2 circuit
Faulty ignition/accy relay supplying the cabin ignition rail
Open or high-resistance wiring/connector between battery/ignition feed and cabin distribution
Short to ground or short to battery on the supply circuit
Poor or corroded ground for downstream loads
Faulty Body Control Module (BCM) or other module that controls the supply

Symptoms

Loss of power to one or more cabin systems when ignition ON (e.g., infotainment, climate controls, interior lights)
Warning or dash messages related to cabin electrics or module faults
Intermittent operation of accessories that are ignition-switched
Possible inability to communicate with affected modules or stored multiple related DTCs
Possible crank/starting issues if supply also used for critical systems

What to check

Read and record all stored DTCs and freeze-frame data with a compatible diagnostic tool
Verify battery voltage and charging system before testing (healthy battery ~12.6V static, 13.5–14.8V charging)
Visually inspect fuses, fuse holders and relays associated with Cabin Ignition 2
Inspect wiring harnesses and connectors for damage, corrosion, water ingress or burns
Check module grounds for cleanliness, tightness and continuity
Measure supply voltage at the fuse/relay output and at affected module pins with key in OFF, ACC and ON positions

Signal parameters

Expected: ~Battery voltage (11–14.8 V) at Cabin Ignition 2 supply with ignition in RUN/ON
Expected: ~0 V (or open) with ignition OFF for ignition-switched circuits (verify vehicle-specific behavior)
Fault condition: open circuit = 0 V when supply should be present
Fault condition: short to ground = low voltage (
Fault condition: short to battery = constant battery voltage present with ignition OFF

Diagnostic algorithm

Connect a diagnostic scanner, read/record all DTCs and live data; note freeze-frame and key position when fault occurred.
Verify battery voltage and health. Recharge or replace battery if voltage is low before continuing.
Locate fuse(s) and relay(s) for Cabin Ignition 2 per wiring diagram. Check fuse continuity and relay operation; replace suspect items.
With ignition ON, measure voltage at the fuse output and at the connector pin for Cabin Ignition 2 at the BCM or distribution block. Compare to battery voltage.
If no voltage at fuse output but battery and relay are good, check relay control circuit and BCM output. If relay stuck or not commanded, investigate BCM/ignition switch inputs.
If voltage present at fuse but not at downstream module, trace wiring for opens/connector faults. Check continuity and resistance to ground where appropriate.
If voltage is present but drops under load, identify and isolate downstream loads; disconnect connectors to find which circuit causes the drop (watch for short to ground).
Inspect and test grounds for affected modules; clean and secure ground connections as needed.
If wiring and power distribution check good but DTC persists, test BCM outputs and communication. Reprogram or replace BCM only after verifying wiring and loads are correct and following manufacturer procedures.
After repairs, clear codes, cycle ignition and recheck system operation and scanner live data. Test under conditions that originally produced the fault to confirm repair.

Likely causes

Blown fuse or faulty relay
Open or corroded connector at fuse/relay/module
Wiring open/high resistance or chafed insulation causing intermittent loss
Short to ground on the supply rail
Failed BCM output or internal module fault

Fault status

⚠️ Status

Cabin Ignition 2 supply circuit fault detected — voltage out of range/open/short or loss of supply to cabin ignition feed. Investigate fuses, relays, wiring, grounds and controlling module.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

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

Your experience will help others

+100 karma for a short comment :)

Was this AI description helpful?

Your feedback helps improve AI descriptions.

👍 Like 0 👎 Dislike 0

Send to email