OBD Testing Procedures and Protocols Exam 2025 Questions and Answers

OBD Testing Procedures and
Protocols Exam 2025 Questions and
Answers


OBD Cable Connection Failure - ANSWER✔✔-Test results vary based on connection

issue.


Connector Cannot Be Located - ANSWER✔✔-Result: FAIL if connector is missing.


Connector Damaged or Tampered - ANSWER✔✔-Result: FAIL if connector is

compromised.


Connector Inaccessible - Handicap Modifications - ANSWER✔✔-Result: MIL Bulb Test

performed.


Connector Inaccessible - BAIID Device - ANSWER✔✔-Result: MIL Bulb Test

performed.


Connector Inaccessible - Aftermarket Devices - ANSWER✔✔-Result: REJECTED due to

unapproved modifications.

, MIL Bulb Test Reasons - ANSWER✔✔-Performed if DLC is blocked or manufacturer

defect.


Fallback MIL Bulb Test Vehicles - ANSWER✔✔-Examples: 1997 Acura 2.5TL, 2006

Mercedes C230.


KOEO Check Failure - ANSWER✔✔-Fails both KOEO and KOER checks result in FAIL.


RDF Incomplete Consequence - ANSWER✔✔-Vehicle rejected; motorist sent to front

office.


RDF Completion Checks - ANSWER✔✔-Verify motorist signature and repair details.


VIN Record Not Found - ANSWER✔✔-Manually enter license plate to retrieve VIN.


Truck Plate Entry Format - ANSWER✔✔-Format: number then B, letter then -B.


Specialty Plate Entry Format - ANSWER✔✔-BD for Bears, BH for Blackhawks.


Test Type Determinants - ANSWER✔✔-Based on model year and vehicle weight rating.


Last 3 Digits of VIN Purpose - ANSWER✔✔-To retrieve OBD VIN from vehicle's

computer.


No Communication Attempts - ANSWER✔✔-Three attempts made during

communication failure.