How to repair battery intermittently not start

How to repair battery intermittently not start.

Model: Santa Fe

Year Model: 2009

Fuel: Diesel

Displacement: 2000cc

Subject: Intermittently impossible to start – Battery terminal

1)Condition

1. Intermittently impossible to crank the engine.
2. When the ignition key is turn “ON” the instrument light cluster indicator light is not turn on.

2) Cause

1. Loosed battery terminal(+)

3) Diagnosis

1. Inspect the battery using battery checker
   = Battery voltage is 12.5 V
   = CCA ( Cold Cranking Ampere)Test = Good Battery
2. Inspect the battery contact point of the battery terminal.
   =Bolt for fixing the (+) terminal is not tightened well.

4) Repair Guides.

1. Retightened battery terminal. 

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