B11EE

Code

LAND ROVER B — Body

Air Conditioning Compressor

Brand: LAND ROVER

Type: B — Body

Views: UK: 23 EN: 61 RU: 23

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Open or short in compressor clutch coil circuit
Blown fuse or faulty relay for A/C compressor
Low or excessive refrigerant pressure (pressure switch/fault)
Seized or mechanically damaged compressor
High current draw from compressor (internal fault)
Poor power/ground or corroded connector at compressor

Symptoms

A/C clutch fails to engage when A/C is requested
No cold air from vents or intermittent cooling
A/C clutch may engage briefly then drop out
Tripped fuses or blown fuse related to HVAC/A/C circuit
Unusual noise from engine bay when A/C is requested (grinding/seizing)
Stored DTC(s) and HVAC/BCM warning messages displayed

What to check

Read and record all stored DTCs and freeze frame data with a capable scanner (include BCM/ICM and HVAC modules).
Check battery voltage and overall charging system health before testing (low voltage can inhibit clutch engagement).
Visually inspect compressor, clutch connector, wiring harness and ground points for corrosion, damage or disconnection.
Check fuses and A/C compressor relay; swap relay with known good if uncertain.
Command A/C compressor ON from a scan tool while monitoring clutch engagement and scan tool feedback.
Measure voltage at the clutch connector while compressor is commanded ON (expect near battery voltage when energized).

Signal parameters

A/C request (HVAC control) — command state (ON/OFF)
Compressor clutch relay state (energized/de-energized)
Voltage to compressor clutch (V) — expect battery voltage when commanded ON
Compressor clutch coil resistance (Ω)
Compressor running current draw (A)
Low-side pressure (bar or psi) with compressor running and idle/RPM

Diagnostic algorithm

Capture the fault: Connect a full-function scan tool, read B11EE and any other stored/related DTCs; record freeze-frame (voltage, engine speed, temps, pressures if present).
Visual inspection: With ignition OFF, inspect wiring, connectors, fuses and compressor for obvious damage, oil/wetness indicating leaks, or seized pulley.
Power & ground verification: With ignition ON and A/C requested, measure battery voltage at the compressor connector power pin and verify good ground. Lack of voltage indicates relay/fuse/wiring or module issue.
Command test: Use the scan tool to request compressor engagement while monitoring the relay and clutch. Note whether the command is issued and if the clutch responds.
Electrical tests: With ignition OFF, measure clutch coil resistance and compare to spec. With compressor commanded ON, measure current draw (amps). High or no current indicates coil, clutch or mechanical problem.
Pressure check: Connect manifold gauges and observe low/high side pressures during operation. Verify pressure switch opens/closes per specification and that refrigerant charge is correct. Low charge or abnormal pressures can prevent clutch engagement.
Component isolation: If voltage is present but clutch does not engage and coil resistance is within spec, test ground continuity and connector integrity. If clutch receives correct voltage but no mechanical movement, suspect seized compressor or defective clutch.
Module & network: If subsystem does not receive or send appropriate CAN messages, inspect network connections and scan for network-related U-codes. Reflash or update module software only after confirming wiring and component health per service information.
Repair & verify: Repair or replace identified faulty parts (connector, wiring, fuse, relay, pressure sensor, clutch or compressor). After repair, clear codes and perform functional test and pressure/stability check to ensure proper cooling and no recurrence.
Refer to manufacturer service manual for vehicle-specific values, torque, refrigerant handling and required special tools (A/C service must follow safe refrigerant recovery procedures).

Likely causes

Compressor clutch not energising due to missing supply or bad ground
Compressor clutch coil open or shorted (out-of-spec resistance)
Pressure switch or refrigerant level prevents clutch engagement
High current draw because compressor is seized internally
Damaged wiring harness or corroded connector at the compressor
Faulty control module or lost CAN messages commanding compressor

Fault status

⚠️ Status

B11EE — A/C compressor fault detected: control module has logged an issue with compressor operation or control circuit. Could be electrical (clutch/coil, fuse, relay, wiring), pressure-related (low/high refrigerant, pressure switch) or mechanical (seized compressor). Further testing required to isolate cause.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

Repair manuals

Manual library for LAND ROVER

266

Browse 266 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