2017 XC60. Dash drops out, windows and climate stop working. Happens on and off. Still starts and drives. Where do I start?
Delivered · vehicle concern
Automotive diagnostics
The right next step.
For complex electrical
and communication faults.
STEP brings your symptoms, vehicle technical data, and test results together, then gives you one focused next check with the reasoning behind it.
You bringThe problem and test results
→STEP connectsThe vehicle and the evidence
→You getThe next right check
01 / A CASE IN MOTION
Follow the evidence.
Find the next step.See how STEP finds the next step
A complex automotive fault. A clear diagnostic path, one result at a time.Dash, windows and climate control fail together. Follow the evidence through seven diagnostic steps.
Illustrative case · 7 steps
STEP diagnostic conversationIllustrative case
The concern2017 Volvo XC60
Applicable diagrams, procedures and test information
SSTEP
Next step
Run a full-system scan
Connect the scan tool and record faults across all modules while the concern is present.
What this check answersIdentify the communication faults and affected systems before selecting a network test.
Recorded result
The scan records multiple lost-communication faults and medium-speed CAN bus faults.
A complex electrical problem. One clear next step.
Scroll to follow the case
- 01
Capture the fault: Run a full-system scan
Connect the scan tool and record faults across all modules while the concern is present.
Result: The scan records multiple lost-communication faults and medium-speed CAN bus faults.
- 02
Measure during the fault: Check the network signal
Observe communication on the relevant network while the systems are failing.
Result: No network activity is present; the signal is close to ground potential.
- 03
Narrow the search: Test the connected branches
Follow the diagram and compare the network response as the suspect areas are checked.
Result: Door wiring checks and disconnecting the instrument cluster do not restore communication.
- 04
Follow a new clue: Correlate movement with the fault
Record whether physical movement in this area consistently changes the network signal.
Result: Pressure on the dashboard changes the fault reproducibly.
- 05
Locate the cause: Inspect the affected wiring route
Inspect the harness around the climate-control and radio area for physical contact or damage.
Result: A network wire is found touching a metal bracket behind the radio.
- 06
Repair and retest: Retest the network after repair
Confirm that communication operates correctly after repairing the wiring and protecting it from contact.
Result: Normal network communication is restored.
- 07
Verify the original concern: Verify the original failures
Recheck the affected systems after reassembly and complete the road test.
Result: The vehicle performs as expected during the final road test.
A REAL STEP SESSION
A real case.
One clear path.
The Check Engine light stays on. The car drives normally. Two faults, one hidden cause.
68 files processed → one clear next step.
STEP DiagnosticsShortened diagnostic conversation
2010 Honda Civic · P0135 + P0498 · Shared power supply
Follow the current circuit fault. With the connector identified from the wire-side view, check the vent valve’s supply in DC volts against the same ground as the battery.
Vent-valve connector · wire-side viewCase illustration Power reaches the fuse. Next, identify the PGM-FI subrelay at position E and inspect it. Its connections and downstream wiring are still possible causes.
Under-hood relay location · position ECase illustration Confirm the socket’s contact-side orientation before probing. Then, with ignition off and relay removed, measure feeds 1 and 4 using suitable insulated probes. Stop if identification is uncertain.
Relay socket · contact-side orientationCase illustration
02 / How STEP does the work
Scattered information in.
The right next step out.
STEP does the work between the two.
The information
Your vehicle. Your symptoms.
Your test results.
STEP gathers the story, scan reports, photos and measurements — including the details that are still missing.
SymptomsScans & photosMeasurements
MOTOR
motor.comVehicle technical information and manufacturer data, supplied to STEP under contract.
The diagnostic work
STEP
STEP builds the case.
It turns scattered information into facts, test history and open questions.
STEP reads the technical picture.
It sees wiring diagrams, reads connector views and locations, and relates manufacturer information to the case.
STEP narrows the possibilities.
It compares possible causes with the evidence and chooses a check that moves the diagnosis forward.
Your next right step
One specific
diagnostic check.
What to do.
Why it matters.
What result to report back.
03 / The next right step, your way
Choose the support behind your next step.
Every plan is built around a clear diagnostic action, with the evidence and reasoning to move your case forward.
DIY
For vehicle owners
The next right check for your own vehicle.
$79 / year
Annual subscription- A focused next step for your electrical or communication fault
- The reason for each check, tied to your case and vehicle data
- A diagnostic path that develops with your results
PRO
For mechanics and shops
Keep difficult cases moving, one right check at a time.
$199 / month
Monthly subscription- Guided next checks for complex electrical and network faults
- Reasoning that builds on each measurement and result
Mobile mechanicsMore diagnostic reach and confidence at the vehicle.
Independent workshopsFill gaps in specialist knowledge and technical resources.
PRO + Expert
With a live diagnostician
The next right step, with a professional alongside you.
$599 / month
Monthly subscription- Everything in PRO
- Online support from a live professional diagnostician
- Discuss results and work through the next check together
Support arrangements and availability are confirmed when we connect.
Request PRO + Expert accessToken usage is billed separately, in addition to the subscription price. Plan access, included capabilities, support availability, and vehicle coverage are confirmed before paid access begins.
04 / Request access
Bring your next
difficult case.
Tell us how you plan to use STEP. Get a clearer path through complex automotive electrical and communication faults.
Focused onAutomotive electrical faults.
Communication problems.
A clear next check.
Communication problems.
A clear next check.