Which of these inputs is NOT used by the PCM to modify the read-only map for ignition timing?
A) Intake air temperature
B) Engine coolant temperature
C) Air flow
D) Throttle position

Question

Quizplus · Accepted Answer

The PCM (Powertrain Control Module) uses various inputs to adjust ignition timing for optimal engine performance and efficiency. Inputs such as intake air temperature, engine coolant temperature, and throttle position are directly used to modify the read-only map for ignition timing. However, air flow is not directly used for ignition timing adjustments; it is more closely related to fuel injection calculations.

Which of These Inputs Is NOT Used by the PCM