9 Questions
What is a milliohm used to test in electric vehicles?
Stator windings
What type of meter is required to accurately measure milliohms?
Milliohm meter
What does the loss of isolation test detect?
Continuity between high-voltage system and chassis ground
What type of meter is used for loss of isolation test with CAT III rating and capable of providing 1,000 volts?
Digital megohm meter
What protocol is used for vehicle diagnostics since 2003 and became a legal requirement for all vehicles by 2008?
CAN protocol
What features does the CAN protocol offer?
Faster communication, cost-effectiveness, and less affected by electromagnetic interference
What is SAE J2534?
A standard for communications between a computer and a vehicle for reflashing emission-related controllers
What have manufacturers developed for J2534 pass-through device or application programming interface (API)?
A device that only works with their brand
What is required for shops or service technicians to obtain security codes or key specific information during the reprogramming process?
Registration as a vehicle security professional
Study Notes
- Milliohm is one thousandth of an ohm and is used to test stator windings in electric vehicles.
- A milliohm meter is required to accurately measure milliohms.
- Loss of isolation test detects unwanted continuity between high-voltage system and chassis ground.
- Digital megohm meter is used for loss of isolation test with CAT III rating and capable of providing 1,000 volts.
- CAN protocol is used for vehicle diagnostics since 2003 and became a legal requirement for all vehicles by 2008.
- CAN protocol offers features such as faster communication, cost-effectiveness, and less affected by electromagnetic interference.
- SAE J2534 is a standard for communications between a computer and a vehicle for reflashing emission-related controllers.
- Manufacturers have developed their own J2534 pass-through device or application programming interface (API) that is specific to their brands.
- The National Automotive Service Task Force (NASTF) has created a portal for all automotive service professionals to access manufacturer-specific reprogramming information.
- Shops or service technicians must be registered vehicle security professionals to obtain security codes or key specific information during the reprogramming process.
- NASTF developed a system for aftermarket repair industry to access sensitive data.
- Locksmith ID number is required to access data.
- Forms and instructions for ID number can be found on NASTF website.
- On-board reprogramming is done with module connected to vehicle.
- Off-board programming is done at a location other than vehicle.
- Remote programming is a new process where a distant party guides the reprogramming.
- Remote programming requires an internet connection and equipment.
- This option is popular for shops with limited reprogramming events or technical expertise.
- On-board programming occurs in a service facility.
- Off-board programming can be done at a local parts store.
Test your knowledge on automotive diagnostics with this quiz! From measuring milliohms to understanding CAN protocols and the J2534 standard, this quiz covers a variety of topics related to automotive service and repair. Learn about the National Automotive Service Task Force's portal for accessing manufacturer-specific reprogramming information and the different programming methods available for vehicles. Whether you're a seasoned automotive technician or just starting out, this quiz will challenge your understanding of the industry.
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