DEFINITIONS – TECHNICAL TERMS

ADJUST - To bring components to specified operational settings.

ALIGN - To bring to precise alignment or relative position of components.

ANALYZE - To examine the relationship of components of an operation.

ASSEMBLE (REASSEMBLE) - To fit together the components of a device.

BALANCE - To establish correct linear, rotational or weight relationship.

BLEED - To remove air from a closed system.

CHARGE - To bring to "full" state, e.g., battery or air conditioning system.

CHECK - To verify condition by performing an operational or comparative examination.

CLEAN - To rid component of extraneous matter for the purpose of reconditioning, repairing, measuring or reassembling.

CONCENTRICITY - A comparison of the center point between circular measurements in
relation to each other.

DEGLAZE – To remove a smooth, glossy surface.

DETERMINE - To establish the procedure to be used to affect the necessary repair.

DETERMINE NECESSARY ACTION – Indicates that the diagnostic routine(s) is the primary
emphasis of a task. The student is required to perform the diagnostic steps and communicate the diagnostic outcomes and corrective actions required addressing the concern or problem. The training program determines the communication method (worksheet, test, verbal communication, or other means deemed appropriate) and whether the corrective procedures for these tasks are actually performed.

DIAGNOSE - To locate the root cause or nature of a problem by using the specified procedure.

DISASSEMBLE - To separate a component's parts as a preparation for cleaning, inspection or service.

DISCHARGE - To empty a storage device or system.

EVACUATE - To remove air, fluid or vapor from a closed system by use of a vacuum pump.

FLUSH - To use a fluid to clean an internal system.

HONE - To restore or resize a bore by using rotating cutting stones.

JUMP START - To use an auxiliary power supply, e.g., battery, battery charger, etc. to assist a battery to crank an engine.

LOCATE – Determine or establish a specific spot or area.

MEASURE - To compare existing dimensions to specified dimensions by the use of calibrated instruments and gauges.

ON-BOARD DIAGNOSTICS (OBD) - A diagnostic system contained in the Powertrain Control
Module (PCM), which monitors computer inputs and outputs for failures.
OBD II is an industry-standard, second generation OBD system that
monitors emissions control systems for degradation as well as failures.

PARASITIC DRAW - Electrical loads which are still present when the circuit is turned OFF.

PERFORM - To accomplish a procedure in accordance with established methods and standards.

PERFORM NECESSARY ACTION – Indicates that the student is to perform the diagnostic
routine(s) and perform the corrective action item. Where various scenarios (conditions or situations) are presented in a single task, at least one of the scenarios must be accomplished.

PRIORITY RATINGS – Indicates the minimum percentage of tasks, by area, a program must
include in its curriculum in order to be certified in that area.

PURGE - To eliminate an undesired air or fluid from a closed system.

REMOVE - To disconnect and separate a component from a system.

REPAIR - To restore a malfunctioning component or system to operating condition.

REPLACE - To exchange a component with a new or rebuilt component; to reinstall a component.

RESURFACE – To restore correct finish.

SERVICE - To perform a specified procedure when called for in the owner's or service manual.

TEST - To verify condition through the use of meters, gauges or instruments.

TORQUE - To tighten a fastener to specified degree or tightness (in a given order or pattern if multiple fasteners are involved on a single component).

VERIFY - To establish that a problem exists after hearing the customer's complaint and performing a preliminary diagnosis.

VOLTAGE DROP - A reduction in voltage (electrical pressure) caused by the resistance in a component or circuit.