WrenchLane

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    Glossary

    The terms you meet in WrenchLane and in workshop diagnostics, in plain language.

    WrenchLane terms

    Admin / Mechanic
    The two user roles. Only admins see Plan & billing and Team and can change the plan.
    AI-estimated values
    Values WrenchLane estimates when the plan does not include verified measurements (Free, and One on vehicles other than its unlocked one), marked as estimates.
    Ask WrenchLane
    The chat for the selected vehicle: ask anything in plain language and get answers using the car's data, the open diagnosis or repair, and cited outside sources. One chat per car. The name is never translated.
    AutoRemote
    WrenchLane's remote programming partner for coding, programming, adaptation and similar dealer-level work the workshop's own tool cannot do, offered on causes and repair steps in 32 European countries.
    Available data
    A popover showing which technical data exists for the selected vehicle.
    Checks to run
    Step-by-step checks on every cause, each with what to expect and a Yes or No answer, saved on the car. Paid plans get checks researched for the exact car; Free gets draft checks.
    Complete diagnostic
    Closing a diagnostic: tick the causes that were fixed, list parts and work, and WrenchLane writes editable invoice text.
    Daily limits
    The per-day caps on Free (diagnostics, chat messages, AI searches, plate lookups), counted per workshop and reset at midnight UTC.
    Demo vehicle
    One fully unlocked vehicle on every plan: a 2015 BMW X5 (F15) xDrive 25d in Europe, a 2018 Ford F-150 3.5L EcoBoost in North America.
    Diagnostic
    A diagnosis session for one car: a description, error codes and mileage go in, ranked possible causes come out. Saved on the car.
    Electronics
    Every electronic system of the vehicle with components, wiring diagrams, CAN-Bus overview, fuses and relays, locations and fault code diagnosis, down to the ECU pin.
    Error code diagnosis
    Guided tests for the entered fault codes: the related components to check one after another.
    Fault code pages
    Public pages on wrenchlane.com per fault code, with evidence counts from diagnostics run in WrenchLane.
    Free
    The default plan: 1 user, 1 diagnostic, 3 chat messages, 10 AI searches and 1 plate lookup a day, the last 5 ongoing diagnostics, the demo vehicle. No card needed.
    Free symptom & DTC checker
    A free, no-signup guide finder that matches a symptom or code to up to 3 published guides. It is keyword matching, not an AI diagnosis.
    Get started
    The checklist of five first tasks with guided tours, in InfoPro countries.
    Help us understand better
    Follow-up questions WrenchLane asks while you type when the description or codes are too vague, with one-tap answers.
    History
    Every car you have worked on, with its ongoing and completed diagnostics and service reports. Free shows the last 5 ongoing diagnostics.
    Images & diagrams
    MOTOR's OEM wiring diagrams and component locations for US, Canadian and Mexican vehicles.
    Invoice text
    The editable text WrenchLane writes for the workshop's own invoice. It is text to copy, not an invoice document.
    Job sheet
    A list of repair tasks with OEM book times; it shows the total if done separately and a lower total if combined, because shared preparation counts once.
    Large
    Same as Small with premium data for 200 vehicles a month.
    Manuals
    The vehicle's InfoPro technical data: adjustments, repair times, lubricants, repair manuals, warning lights, technical drawings and timing belt or chain manuals.
    OEM info
    The manufacturer's own cases (SmartCASE), recall data and technical service bulletins for the vehicle.
    Onboarding reward
    Seven days of higher daily limits (10 diagnostics, 30 chat messages, 100 AI searches) for a Free workshop that finishes the Get started checklist. Once per workshop.
    One
    A one-user paid plan with no daily caps and one permanently unlocked vehicle.
    Possible causes
    The ranked list of causes WrenchLane gives for the exact vehicle, each with a severity, description, suggested tests and related components. Probabilities are per cause and do not add up to 100 percent.
    Premium data
    Licensed OEM technical data: InfoPro in Europe, MOTOR Images & diagrams in North America.
    Premium data vehicles per month
    How many different vehicles a workshop can open premium data for each calendar month: 50 on Small, 200 on Large. Reopening a car in the same month does not count again.
    Refine diagnosis / Re-do diagnosis
    Add information, review answers and excluded causes, then run a new analysis that takes them into account.
    Repair guide
    Starting a repair on a cause confirms it and opens step-by-step instructions to tick off, with a sources block, labor time and parts. The guide is built for the exact car from OEM repair information and technical data and lists its sources; the steps are not copied from the manufacturer's manual.
    Service & maintenance
    The service planner: choose the interval (or let Suggest pick it from mileage and registration date), see tasks and parts, then perform the service as a checklist.
    Service report
    A finished service saved on the car, reopened from the vehicle page or History.
    Severity
    How serious a cause is (High, Medium, Low), shown separately from how likely it is.
    Small
    Workshop plan with up to 11 users, no daily caps, verified measurements and premium data for 50 vehicles a month.
    Sources
    The citation chips under an Ask WrenchLane answer that open the page the information came from.
    This is not it
    The action that rules a cause out so a refined diagnosis can exclude it.
    TSBs (card)
    WrenchLane's technical service bulletin search: describe the problem or enter codes and get the most relevant bulletins for the vehicle.
    Unlock this vehicle
    On One, the action that permanently unlocks premium data for one chosen car.
    Vehicle page
    The page for a selected car, with a vehicle panel and cards for Diagnostic, Images & diagrams, Service & maintenance, TSBs, Manuals, Electronics and OEM info.
    Verified measurements
    OEM-verified torque, voltage and resistance values for the exact car, on Small and Large and on the One plan's unlocked vehicle.
    Workshop country
    The country chosen at sign-up; it decides the vehicle search, data sources and features the workshop gets.
    WrenchLane
    The AI diagnostic and repair assistant for independent workshops, on the web at app.wrenchlane.com and as an iPhone, iPad and Android app.
    WrenchLane Guides
    The free public site guides.wrenchlane.com with plain-language diagnostic guides for common fault codes and symptoms.

    Automotive terms

    Adjustments / specifications
    Manufacturer values such as tightening torques, clearances and capacities.
    Aftermarket
    Parts, tools and data not from the carmaker, used by independent workshops.
    CAN-Bus
    The network the control units use to talk to each other; network faults show up as U codes.
    Code systems (P, C, B, U)
    The first letter of a DTC names the system: P powertrain, C chassis, B body, U network (communication between control units).
    Coding, programming and adaptation
    Software work on a control unit after a part is replaced: downloading software, coding it to the car, and teach-in or adaptation. Often needs a factory tool.
    Comeback
    A car that returns because the first repair did not fix the fault.
    Component location
    Where a part sits in the car (engine bay, fuse box, diagnostic connector).
    Diagnostic connector
    The socket in the car where the scan tool plugs in (OBD or EOBD plug); its position is shown under Locations.
    DTC (diagnostic trouble code)
    A standardised code an ECU stores when it detects a fault, such as P0300. WrenchLane accepts several at once and looks each one up as you type.
    ECU (electronic control unit)
    A computer that controls a system in the car, such as the engine, brakes or body. Fault codes are stored per ECU.
    ECU pin and connector
    The pin-by-pin table for a component's or control unit's connector, used to measure at the right point.
    Engine management system
    The engine ECU and its software family; some vehicles need it chosen to get the right data.
    Fault code / error code
    Everyday names for a DTC. The app's form says "Error codes", other screens say "Fault code".
    Freeze frame
    A snapshot of sensor values (speed, temperature, load and so on) the ECU stores at the moment a fault code is set. The app has no freeze-frame field; useful values can go in the Description.
    Fuses and relays
    The circuit-protection and switching components, with their positions and assignments.
    Generic and manufacturer-specific codes
    Generic codes mean the same on every car (for example P0xxx); manufacturer-specific codes are defined by the carmaker (for example P1xxx, or BMW codes like CD0100). WrenchLane keeps manufacturer codes whole when looking them up.
    Independent workshop
    A workshop not tied to one carmaker's dealer network. WrenchLane's core customer.
    Infopro Digital Automotive / HaynesPro / InfoPro
    Infopro Digital Automotive is the European data partner, the team behind HaynesPro. The app shows its technical data as "InfoPro", in 32 EU, EFTA and UK countries.
    Labour time / book time
    The standard time the manufacturer or data provider sets for a repair task, used to quote and invoice.
    Light commercial vehicle (LCV)
    Vans and small trucks, for example from a Caddy to a Sprinter.
    Lubricants and fluids
    The specified oils, coolant, brake fluid and quantities for the vehicle.
    Mileage / odometer reading
    The distance the car has driven; WrenchLane uses it to weight age-related causes and to suggest the service interval.
    MOTOR
    The North American data partner behind Images & diagrams (US, Canada, Mexico). Users accept MOTOR's end-user terms before use.
    OBD reader / scan tool
    The device that reads fault codes from the car. WrenchLane works with the one the workshop already has: photograph its screen or type the codes.
    OBD-II / EOBD
    On-board diagnostics: the standard that makes cars report emission-related faults through a diagnostic socket. OBD-II is the US standard, EOBD its European equivalent.
    OEM (original equipment manufacturer)
    The carmaker, and by extension data and parts that come from it. "OEM data" means manufacturer data.
    Recall
    A manufacturer campaign to fix a safety or compliance defect, usually done by the dealer at no cost to the owner.
    Repair order (RO)
    The workshop's record of the job for a customer's car: work, parts and labour. In WrenchLane the closest things are the job sheet and the invoice text.
    SAE J2012 failure type
    The standard that defines DTCs, including the two-character failure-type byte after a code (the "-12" in P0011-12, for example "Circuit short to battery"). WrenchLane shows the failure-type name next to the code.
    Service indicator reset
    The procedure to reset the service light or message after a service.
    Service interval
    The manufacturer's schedule of service tasks by distance or age.
    SmartCASE
    Documented real repair cases from the data partner: symptom, cause and solution for a vehicle.
    TecDoc
    The parts catalogue standard; service parts lists show TecDoc generic article ids.
    Timing belt / timing chain
    The belt or chain that keeps the crankshaft and camshafts in time; replacing it follows a vehicle-specific procedure.
    Torque value
    The tightening torque a bolt must be tightened to, in Nm.
    TSB (technical service bulletin)
    A notice from the manufacturer to workshops about a known problem and its fix on specific vehicles. Not a recall.
    VESA
    The electronics data set (systems, components, wiring, locations, fault codes) behind the Electronics card; the pricing page lists "Wiring diagrams (VESA Electronics)".
    VIN (vehicle identification number)
    The 17-character code that identifies an individual vehicle. WrenchLane decodes it to the exact vehicle in InfoPro countries (EU, EFTA, UK); the US, Canada and Mexico pick the car by year, make, model and engine instead.
    VRM / license plate
    The vehicle registration mark on the plate. In WrenchLane, plate lookup works for Swedish plates only.
    Warning lights
    The dashboard symbols and what each one means.
    Wiring diagram
    A drawing of an electrical circuit: components, connectors, wire colours and pins.