C101F — Right front valve failure

Diagnostic algorithm

1. Use a capable diagnostic scanner to read stored/active DTCs and live data for ride height, valve command and compressor status.
2. Verify vehicle on level surface and record static ride heights for all corners.
3. Visually inspect right front valve, air lines and connectors for damage, corrosion or unplugged fittings.
4. Check related fuses and relays and verify supply voltage at the valve connector (key on and when commanded).
5. Measure valve coil resistance at the connector (with harness disconnected) and compare to specification.
6. Command the right front valve on/off using the diagnostic tool while monitoring voltage and listen for operation. If no response, try supplying 12 V directly (bench or fused jumper) to confirm valve function — only if safe and recommended by shop procedures.
7. If valve operates when directly powered, trace wiring back to module for opens/shorts and check connector pins for corrosion or poor contact.
8. If valve does not operate when powered, remove and bench-test or replace the valve assembly. Inspect valve block for contamination.
9. Check for air leaks at fittings and air spring; repair any leaks and re-test.
10. If wiring and valve are good, check suspension control module inputs/outputs and CAN communication. Reflash or replace module only after verifying external components.
11. Clear codes and perform a system learn/initialization and road/functional test to confirm repair.