Field Case Study,Hyundai Sonata(FL)=ATM 3rd GEAR Hold

Model: Sonata (FL)	Year Model: 2009	mileage:40000km
Displacement: 2400 cc	Fuel: Gasoline	T/A: Auto
N code: Impossible to Shift	C code: Poor Contact & Short,Open Circuit	System: Fuse & Relay Information

Subject: ATM 3rd Gear Hold = ATM Control Relay

1) Trouble Condition:

1. Automatic Transaxle 3rd gear Hold During Driving.

2) Trouble Cause:

1. Inoperative ATM control relay due to poor wiring Ground.

3) Trouble Diagnosis:

1. Scan tool check =Diagnostic Trouble Code.
   

DTC	Diagnostic Item
P1723	ATM control relay open

    = Inspect the current data.
    = AT control Volt 0.00V.

1. Inspect A/T control relay.
   = Calculate a resistance value of A/T relay coil:95 ohms = Normal
   = Check contact piont after removing A/T relay cover: Normal.
   = Inspect power source and ground condition using test lamp and multimeter.
   = # 1 terminal: 12Volt
   = # 4 terminal: the power is supplied for about 3.6 seconds the Cut oof when IG ket is turned “ON”
   = #2 Ground does not opperate
2. Check the wire from the C48 connector tpo G14 ground point using multi meter: 0 ohms ( Normal)
3. Inspect G 14 Ground point: Poor volt for tightening ground point.
   
   =Normal Condition After After Retightening the Bolt.