B13D9

Code

LAND ROVER B — Body

Cabin 1

Brand: LAND ROVER

Type: B — Body

Views: UK: 19 EN: 25 RU: 26

AI status

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Page language: EN

Causes

Intermittent or open/shorted wiring to an interior sensor or module
Corroded, loose or contaminated connector in the cabin area
Failed cabin sensor (temperature, occupancy, microphone, light sensor, etc.)
Interior control module malfunction (software or hardware)
Loss of power or ground to the cabin module
CAN/LIN bus communication fault or message corruption

Symptoms

MIL or warning message related to an interior or comfort system
Loss or erratic operation of cabin feature(s) (climate control, occupant detection, interior lights, microphone, infotainment inputs)
Intermittent faults that appear/disappear with door open/close or vehicle vibration
Stored DTCs in one or more body/control modules related to cabin functions

What to check

Use a capable scan tool to read stored and pending DTCs and capture freeze-frame data
Check for related codes in other modules (HVAC, restraint, infotainment, gateway)
Visually inspect connectors and wiring in the cabin area for corrosion, damage or water entry
Check fuses and relays supplying the cabin module
Verify module is powered and has a good ground with a digital multimeter
Monitor CAN/LIN bus for active communications and error frames

Signal parameters

Module supply voltage (approx. battery voltage, ~11–14 V)
Module ground continuity (low ohms to chassis)
CAN_H and CAN_L idle voltages (~2.5 V differential behavior)
LIN wire signals (voltage pulses as applicable)
Sensor analog voltages or resistance values expected for the specific sensor (refer to TSB/service data)
Live-data values for cabin parameters (temperature, occupancy state, microphone level, illumination level)

Diagnostic algorithm

Connect OEM-level scan tool and read all stored/pending DTCs and freeze-frame; note related module names and timestamps
Clear codes and attempt to reproduce the fault to confirm persistence; if intermittent, try door cycles and vehicle start/stop
Inspect the interior area for signs of water ingress, physical damage or connector contamination; reseal or repair as necessary
Visually inspect and gently tug wiring harnesses to identify intermittent faults; repair any chafing or broken wires
Verify power and ground at the suspected cabin module connector with key-on and engine-off; backprobe if necessary
Monitor live data and communication bus messages while exercising affected functions; look for missing or invalid signals
If wiring and power/ground are good but communications are failing, check gateway/gateway fuse and other nodes on the CAN/LIN segment for faults
If the module appears to be at fault after verifying wiring and communications, check for available software updates or known service bulletins before replacing the module
Replace the defective sensor/module only after confirming the fault cause; perform post-repair code clear and vehicle function verification

Likely causes

Loose or corroded connector at the cabin module or sensor
Failed interior sensor (age or impact)
Power/ground disruption to the cabin control unit
CAN/LIN communication error between cabin module and gateway

Fault status

⚠️ Status

Stored when the vehicle detects an anomaly related to the 'Cabin 1' interior subsystem. Refer to module-specific data and manufacturer service information for detailed interpretation.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.5 hours

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LAND ROVER

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