Description

First of all check damage of harness and terminals : Check terminals for contact resistance, corrosion and deformation.

Perform the battery load test to inspect battery. (Battery has been on charge fully.)

Diagnostic Procedure
Battery load test
1.

IG KEY "OFF"

2.

Remove the main relay (engine control relay) to prevent engine starting from cranking.

3.

Check battery voltage using multimeter.

4.

Install a ampere meter (Clamp type) to power cable of the starter.

5.

Check the flow current and battery voltage while engine cranking.

☞ The flow current should be 180A ~ 250A while engine cranking. [The flow current can be changed by engine temperature and starter capacity (W).] (Fig.1)

☞ Battery voltage should be above 9.8 V while engine cranking. (Fig.2)

Symptom

Inspection procedure

Case1

● Battery voltage is dropped below 9.8 V and flow current is dropped rapidly while engine cranking (load is applied).

● Replace the battery. (Inner cell short and battery life run out.)

Case2

● Battery voltage is above 9.8 V and flow current is regular while engine cranking (load is applied).

● Reuse the battery (Battery is good) after checking the battery fluid leak and corrosion of terminals.

Яндекс.Метрика