How to know the code P0625 and the possible cause.

How to know the code P0625 and the possible cause

2008  G 2.4 DOHC  Engine  Unleaded EOBD  P0625 Generator Field/F Terminal Circuit Low Input

Component Location

General Description of Study

Stusy Alternator output and power demand of all electrical loads and systems must be matched to each other as ideally as possible so that the entire system is reliable and trouble-free in operation. Study The ECM monitors alternator output deviation from the signal of the FR terminal of the alternator when the engine is running

StudyDTC Description

Study ECM sets DTC P0625 if the ECM detects output duty signal lower than the possible range of a properly operating alternator

Study DTC Detecting Condition

Item
Detecting Condition
Possible Cause

Study DTC Strategy
● Study Electrical Check
● Study Short to battery in harness
● Study Poor connection or damaged harness

Enable Conditions
Study Case1
● Time after ignition ON > 0.1sec.
● Engine speed=0
● No main relay error

Study Case2
● Engine speed >0rpm
● No relevant failure
● Battery voltage <16V
● 600< Engine speed(rpm) <4000
● Coolant temp. >73°C(140°F)

Threshold Value
Case1
● Alternator load <15%

Case2
● Alternator load <2%

Diagnostic Time
Case1
● 1sec.

Case2
● 20sec. 

Study Signal Waveform

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