Code
U2010
LAND ROVER
U — Network/User
Switch lighting
Views:
UK: 5
EN: 7
RU: 5
AI status
Completed
Completed
100%
Causes
- Open or short in switch illumination power or ground circuit
- Faulty switch or switch illumination lamp/LED
- Corroded or loose connector at the switch or body control module (BCM)
- Body Control Module (BCM) or lighting control module hardware/software fault
- Interrupted CAN/LIN communication or bus errors affecting illumination commands
- Blown fuse or failed wiring harness splice
Symptoms
- Switch backlighting or instrument illumination not working or intermittent
- Interior switch illumination that remains on or off regardless of dimmer setting
- Multiple modules showing related communication faults
- Illumination level incorrect or flickering
- Stored U2010 and possibly other communication-related DTCs
- Warnings or infotainment messages about lighting or module faults
What to check
- Read all stored DTCs and freeze-frame data with a capable scan tool; note related U-codes
- Visually inspect fuses, lighting relays and relevant wiring harnesses for damage or corrosion
- Inspect connectors at the affected switches and at the BCM/lighting module for corrosion, bent pins or water ingress
- Check for recent repairs or aftermarket installations that may have disturbed wiring
- Verify battery voltage and ground integrity under load
- Scan the CAN/LIN bus for errors, missing nodes or incorrect termination
Signal parameters
- Supply voltage: ~12 V (key on) to switch illumination circuit — verify present and stable
- Ground continuity: low resistance ground to chassis and module ground pins
- Illumination control: many systems use PWM dimming — expect a modulated signal rather than steady voltage (frequency and duty are model-specific)
- Network: presence of expected module messages on CAN/LIN (message periodicity/model dependent)
- No excessive bus errors on CAN (CRC, ACK, or error frames) and proper bus voltage levels on CAN_H/CAN_L
Diagnostic algorithm
- Use a scan tool to read U2010 and all related codes; record module and message data. Note when the fault sets and any freeze-frame data.
- Visually inspect fuses, relays, switch housings and harnesses related to switch illumination. Repair any obvious damage.
- With ignition on, verify power and ground at the affected switch connector(s). Operate dimmer and verify voltage or PWM changes at the illumination terminal.
- Backprobe the switch illumination circuit and monitor with a multimeter and oscilloscope (if available) to check for PWM dimming, steady voltage, or intermittent drops.
- Wiggle test harnesses and connectors while observing live data and voltages to reproduce the fault. Check for water ingress or corrosion at connectors.
- Scan the vehicle network for bus errors and missing module messages. Check CAN/LIN physical layer (wiring continuity, resistance, termination) if communication faults are present.
- If supply, ground and network are good but the switch still fails, swap or bench-test the suspect switch or replace the switch lighting element (bulb/LED) as per manufacturer procedure.
- If swapping the switch does not clear the fault, consider BCM/lighting module reprogramming, reflashing or replacement following manufacturer diagnostics.
- Clear codes and perform a road/test re-check and functional test of illumination and other related modules to confirm repair.
Likely causes
- Faulty switch or switch lighting element (bulb/LED)
- Intermittent connector/corrosion at switch or BCM
- Loss of supply or ground to the illumination circuit (blown fuse or damaged wire)
- BCM or lighting module failing to send/receive the expected message
- CAN/LIN bus errors or termination problem causing message corruption
Fault status
Status
Switch lighting — invalid or missing illumination data/power. Inspect supply, ground, connectors, module and vehicle network for faults.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
U2010
Other
U — Network/User
Module is Not Responding (Non SCP)
Views:
UK: 15
EN: 27
RU: 25
AI status
Completed
Completed
100%
Causes
- Open or short in switch illumination power or ground circuit
- Faulty switch or switch illumination lamp/LED
- Corroded or loose connector at the switch or body control module (BCM)
- Body Control Module (BCM) or lighting control module hardware/software fault
- Interrupted CAN/LIN communication or bus errors affecting illumination commands
- Blown fuse or failed wiring harness splice
Symptoms
- Switch backlighting or instrument illumination not working or intermittent
- Interior switch illumination that remains on or off regardless of dimmer setting
- Multiple modules showing related communication faults
- Illumination level incorrect or flickering
- Stored U2010 and possibly other communication-related DTCs
- Warnings or infotainment messages about lighting or module faults
What to check
- Read all stored DTCs and freeze-frame data with a capable scan tool; note related U-codes
- Visually inspect fuses, lighting relays and relevant wiring harnesses for damage or corrosion
- Inspect connectors at the affected switches and at the BCM/lighting module for corrosion, bent pins or water ingress
- Check for recent repairs or aftermarket installations that may have disturbed wiring
- Verify battery voltage and ground integrity under load
- Scan the CAN/LIN bus for errors, missing nodes or incorrect termination
Signal parameters
- Supply voltage: ~12 V (key on) to switch illumination circuit — verify present and stable
- Ground continuity: low resistance ground to chassis and module ground pins
- Illumination control: many systems use PWM dimming — expect a modulated signal rather than steady voltage (frequency and duty are model-specific)
- Network: presence of expected module messages on CAN/LIN (message periodicity/model dependent)
- No excessive bus errors on CAN (CRC, ACK, or error frames) and proper bus voltage levels on CAN_H/CAN_L
Diagnostic algorithm
- Use a scan tool to read U2010 and all related codes; record module and message data. Note when the fault sets and any freeze-frame data.
- Visually inspect fuses, relays, switch housings and harnesses related to switch illumination. Repair any obvious damage.
- With ignition on, verify power and ground at the affected switch connector(s). Operate dimmer and verify voltage or PWM changes at the illumination terminal.
- Backprobe the switch illumination circuit and monitor with a multimeter and oscilloscope (if available) to check for PWM dimming, steady voltage, or intermittent drops.
- Wiggle test harnesses and connectors while observing live data and voltages to reproduce the fault. Check for water ingress or corrosion at connectors.
- Scan the vehicle network for bus errors and missing module messages. Check CAN/LIN physical layer (wiring continuity, resistance, termination) if communication faults are present.
- If supply, ground and network are good but the switch still fails, swap or bench-test the suspect switch or replace the switch lighting element (bulb/LED) as per manufacturer procedure.
- If swapping the switch does not clear the fault, consider BCM/lighting module reprogramming, reflashing or replacement following manufacturer diagnostics.
- Clear codes and perform a road/test re-check and functional test of illumination and other related modules to confirm repair.
Likely causes
- Faulty switch or switch lighting element (bulb/LED)
- Intermittent connector/corrosion at switch or BCM
- Loss of supply or ground to the illumination circuit (blown fuse or damaged wire)
- BCM or lighting module failing to send/receive the expected message
- CAN/LIN bus errors or termination problem causing message corruption
Fault status
Status
Switch lighting — invalid or missing illumination data/power. Inspect supply, ground, connectors, module and vehicle network for faults.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
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👎 Dislike
0
Send to email