Starting and Charging Diagnosis

Schematic:

The F-terminal circuit is for Pulse Width Modulated (PWM) duty cycle output which the PCM monitors to determine electrical system load. The PCM will adjust idle speed according to electrical load.

DTC Parameters
DTC P0622 will set under either of the following conditions:
- F-terminal duty cycle is less than five percent for 30 seconds.

-OR-

- F-terminal duty cycle is greater than 65 percent for 5 seconds and engine is not running.

Starting and Charging Diagnosis

Schematic:

Diagnostic Chart: