How to repair communication error on GDS.

How to repair communication error on DGS?

Model: Hyundai Sonata(FL)
Year Model: 2009
Fuel: Gasoline
Displacement: 2400cc
Subject: GDS(Global Diagnostic System) Communication error.
1) Condition

1. GDS can not communicate with ECM.

2) Cause

1. Open circuit in DLC (Data Link Connector) K-Line wire.

3) Diagnosis

1. Check the fuse related to ECM – Normal.
   
2. Check the DLC connector pin – Normal.
   
3. Check the K-Line, communication terminal using oscilloscope in GDS.
   = No output signal detected (Spec. 5V in IG “ON” condition).
   
4. 5V output signal from K- Line terminal that is connected to multi-purpose check connector.
   
5. Check for a circuit between DLC K-Line and MCC K-Line with multi meter = open circuit.

4) Guide to Repair

1. Repair DLC wire.
   
2. Communication OK.

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