General Information

Engine Control
P0625 Generator Field/ F Terminal Circuit Low - General Information

Component Location





General Description

PCM monitors the normality of PWM signal in alternator's FR circuit by comparing with the criterion value under IG ON state.
The signal duty is directly propotional to electrical load.

DTC Description

P0625 is set when the PWM signal(Low side) in FR circuit is below 80% during engine stop state.
P0625 is set when the PWM signal(Low side) in FR circuit is below 3% during engine running state.

DTC Detecting Condition





Diagnostic Circuit Diagram





Signal Waveform & Data








1 Normal waveform with IG ON
2 Normal waveform with Idle and no electrical load
3 Normal waveform with Idle and part electrical load
4 Normal waveform with Idle and full electrical load(A/C, Defrost, Head Lamp, Repeater, Audio, etc)