Glossary “HBV” Definition:
Heater Blower Voltage, or Heater By-Pass Valve
h
HC
Glossary “HC” Definition:
Hydrocarbon. Any number of compounds of carbon and hydrogen used as fuel, such as gasoline. High levels of hydrocarbons in tailpipe emissions are a result of unburned gasoline.
HCB
Glossary “HCB” Definition:
Heated Crankcase Breather
Hazard Communication Rules
Glossary “Hazard Communication Rules” Definition:
EPA regulations that outline disposal requirements for cleaning chemicals, used oil, heavy metals, antifreeze/coolant, asbestos, and other hazardous materials.
hazard system
Glossary “hazard system” Definition:
Driver controlled system of flashing front and rear marker lights to warn approaching motorists of a potential hazard.
hazardous material
Glossary “hazardous material” Definition:
Any material that can cause illness, injury, or death or pollute the air , ground, or water
hazardous waste
Glossary “hazardous waste” Definition:
1). Any product used in a system that is considered harmful to people and/or the environment. 2). Any poisonous substance, the byproduct of a poisonous substance, or one that contains carcinogens and is considered unsafe for animal or plant life by the EPA.
hash
Glossary “hash” Definition:
1). Form of electrical noise. 2). An unclear or messy section of a scope pattern.
hat
Glossary “hat” Definition:
Pipe like housing for the injector on a constant flow fuel injection system.
hatchback
Glossary “hatchback” Definition:
Passenger car body style where a full opening hatch, including the rear window, lifts for access to the cargo storage area.
harsh shift
Glossary “harsh shift” Definition:
Opposite of a mushy shift, it is when the transmission makes a gear change that is very fast.
harshness
Glossary “harshness” Definition:
Refers to the vehicle’s ride. It is normally used to describe a firmer than usual response from the suspension system.
HAS
Glossary “HAS” Definition:
High Altitude System
harness clip
Glossary “harness clip” Definition:
Metal or plastic clip used to secure a wiring harness to the car frame or body at various points, providing safe and neat routing.
harness connector
Glossary “harness connector” Definition:
Electrical connector at the end of a wire or harness used to connect the conductor to a device or system.
harn
Glossary “harn” Definition:
Acronym form of Harness
harness
Glossary “harness” Definition:
Group of electrical conductors laced or bundled in a given configuration, usually with several breakouts, or T/O’s.
harmonic balancer
Glossary “harmonic balancer” Definition:
Balance shaft or wheel that reduces or eliminates harmonics.
harmonic damper
Glossary “harmonic damper” Definition:
Term used for harmonic balancer.
harmonic vibration
Glossary “harmonic vibration” Definition:
Rhythmic vibration of a moving part or assembly at a specific speed.