How to repair and inspect alternator

How to repair and inspect alternator

Model: Sonata(NF)

Year Model: 2006

Fuel: Gasoline

Displacement: 2400cc

Subject: Alternator light indicator ON and engine low power.

1) Condition

1. Alternator light indicator ON and engine low power

2) Cause

1. Due to alternator

3) Diagnosis

1. Scan tool check
   = Trouble code  P0625 Generator Field/F Terminal Circuit Low Input.

4) Replace Parts

• Alternator assembly

2006  G 2.4 DOHC  Alternator

Component Location

General Description

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

DTC Description

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

DTC Detecting Condition

Item
Detecting Condition
Possible Cause

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

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

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.

Signal Waveform

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