Step 1: Stabilize & Power
Fit a good battery to guarantee stable system voltage. Autel MaxiSys MS908S Pro II boots fast and auto-ID’s the vehicle, eliminating manual setup errors.
Step 2: Global Health Scan
Run a full system scan first. MaxiSys MS908S Pro II flags not only the Air Suspension (RLM / Ride Level Control) module fault (“Pressure increases too slowly”) but also any secondary issues (e.g., intermittent engine DTCs) so scope creep is contained.
Step 3: Drill Into Suspension Module
Retrieve freeze-frame and fault frequency to confirm the fault is hard, not intermittent—justifying physical inspection before random part swapping
Step 4: Live Data Validation
Monitor reservoir (gallery) pressure rise rate, valve states, compressor temperature, motor temperature, and individual corner height values. MS908S Pro II’s graphing shows sluggish pressure climb—classic weak/absent compressor behavior.
Step 5: Physical Inspection & Benchmark
Discover the compressor assembly missing; supplied used units evaluated on the bench. Refit the best candidate; re-run live data. Pressure plateau and rising motor temperature confirm marginal performance—documented with screenshots from the tool.
Step 6: Controlled Actuations
Use bi-directional controls (fill reservoir, vent, raise/lower corners) to ensure that valves, sensors, and bags function properly. This isolates the compressor as the primary fault while ruling out leaks.
Step 7: Thermal & Leak Observation
After achieving target ride height, let the vehicle sit. Re-scan with the Autel MaxiSys MS908S Pro II: no new suspension DTCs; heights stable—no bag leakage stressing the system.
Step 8: Customer Reporting
Generate and export a professional diagnostic report directly from the Autel MaxiSys MS908S Pro II—pre-repair vs post-repair data builds trust and sets the stage for recommending a new OEM compressor later.
Result: Vehicle restored to adjustable height operation; fault cleared; risk of repeat failure transparently communicated.
Tool Advantage: Autel MS908S Pro II Scanner reduced guesswork, validated each stage with data, and turned a chaotic “box of used parts” job into a structured, billable diagnostic success.
Any questions about Autel equipment diagnosis, please contact us
WhatsApp: +86 150 0270 5698
Skype: cardiag.co.uk
E-Mail: sales@CardiagTool.co.uk