Title: Differentiate between electrical and engine mechanical problems that cause a slow-crank or a no-crank condition.
Course: Automotive Technology III (20104-III) > Section: Electrical/Electronic Systems: Starting System Diagnosis and Repair

Differentiation should include physically turning over the engine with a breaker bar. (Note: If the engine turns normally, according to vehicle make and age, the problem is electrical.)

ASE Education Foundation
2017 Automobile Service Technology (AST) Level
VI. Electrical/Electronic Systems
C. Starting System Diagnosis and Repair
Task 6

Process/Skill Questions:

- What mechanical problem could cause a slow crank?
- What is the voltage of a fully charged car battery?
- What is the available cold cranking amperage (CCA) of the battery?
- What could cause a no-crank condition?