Volkswagen Golf Service & Repair Manual: Current draw test
WARNING
| It is not permissible to test or charge batteries
whose magic eye shows light yellow. Do not slave/jump
start the vehicle! |
| Danger of explosion when checking and charging or
slave/jump starting. |
| These batteries must be renewed. |
|
 Note
| Ensure that the correct charging mode is set on the charger
so that the current draw test is not falsified. |
| To quickly ascertain the state of discharged batteries, the
battery current draw test whilst charging helps to determine
whether the battery must be replaced or fully recharged. |
Note
| For battery tester with printer -VAS 6161-, the current draw
test must always be performed when the test result “Perform
current draw test” appears on the display. |
| The current draw test should always be carried out if
|
| The result of the test with battery tester with printer -VAS
5097A- gave the following results: |
| 1 - |
Starting capability sufficient |
| 2 - |
Starting capability poor |
| 3 - |
Starting capability very poor |
| 4 - |
Cannot be tested – charge battery and repeat test. |
| - |
and when the tester will not switch on (no LED, no printout) |
| The result of the test with battery tester with printer -VAS
6161- gave the following result: |
| 1 - |
Perform current draw test |
| Performing a current draw test whilst charging a battery
will quickly establish whether a partly or fully discharged
battery
→ Chapter can be recharged to return it to a
serviceable condition. |
| When charging the battery, its temperature must be at least
≥ +10°C. |
| The charger must be capable of outputting a charge current
of at least 30 A, as for example with VAS 5095A, VAS 5900, VAS
5903 |
| The battery's current draw must be measured with a current
pick-up clamp, e.g. VAS 5051B/7, when charging with battery
charger -VAS 5095A-. Battery charger -VAS 5900- and battery
charger -VAS 5903- display the current draw on the unit. Battery
charger -VAS 5900- performs the current draw test automatically
with menu guidance. |
| – |
Connect battery to battery charger and start charging
sequence. |
| – |
Measure charge current of battery after 5 minutes. |
| If the current draw A is higher than 10% of the nominal
capacity (e.g. > 6.1 A for a 61 Ah battery), fully charge
battery and test again. |
Note
| For Eos with two 6V absorbent glass mat batteries, the
charge current must only be 5% higher than the nominal capacity
of the battery. Example for Eos: the 50 Ah battery must have a
charge current higher than 2.5 A after 5 minutes of starting the
charging sequence. |
| – |
Fully charge the battery when the charge current is higher
than 10% of the nominal capacity (observe exception for Eos in
above note). |
| – |
Perform battery test after allowing battery to rest for two
hours
→ Chapter. |
| If the charge current, in amperes, lies below 10% of the
nominal capacity after 5 minutes of starting the charging
sequence (5% for the 2 x 6 volt batteries in the Eos) (example
for 50 Ah battery < 5A), renew battery. For warranty and
goodwill cases, please complete the battery test sheet. |
|
Under certain circumstances, the display may show errors or
messages according to status.
The most frequent display messages are listed below,
...
WARNING
Danger of injury! Observe warning notices and safety
regulations
→ Chapter!
...
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Dealing with problems with Midtronics -MCR340V- battery tester
Charging battery