Volkswagen Golf Service & Repair Manual: Charging battery
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. |
|
| INC 940 initial setup performed (dealership number,
date/time)
→ operating manual INC 940. |
| – |
Check general information
→ Chapter. |
| – |
Open bonnet or cover for other installation location of
battery. |
| – |
Perform visual check of battery
→ Chapter. |
| – |
Determine whether battery type is “Standard” (wet battery)
or “AGM” (absorbent glass mat battery). |
| – |
Close all vehicle doors. |
 Note
| Battery temperature must be at least 10°C. |
| For additional information, refer to the
→ operating manual INC 940. |
| Perform charging procedure: |
| – |
Switch off all electrical consumers. |
| – |
Switch off ignition and remove ignition key. |
| – |
Connect red terminal clamp “+” of charger unit to positive
terminal on battery. |
Note
| In vehicles with start/stop function and battery monitor
control unit -J367- fitted, black terminal clamp must be
connected to body earth. Connecting it to battery negative
terminal will cause start/stop system to malfunction. |
| – |
Connect black terminal clamp “-” of battery charger to
negative terminal. |
| – |
Connect Midtronics -INC 940- battery charger to an earthed
socket. |
| – |
Set “ON/OFF” switch of Midtronics -INC 940- battery charger
to “ON”. |
| – |
Select “Automatic” or “Manual” charging mode. |
| – |
Select test “In vehicle” or “Outside vehicle”. |
| – |
Select battery type “Standard ” or “AGM” (absorbent glass
mat). |
| – |
Select test type “Warranty” or “Miscellaneous”. Note
additional details (depending on type of test). |
Note
| For additional information, refer to the
→ operating manual INC 940. |
| If necessary, make a note of menu items required for
“Warranty” test type
→ Warranty service circular. |
| Midtronics -INC 940- battery charger tests battery and
starts charging procedure. The display then shows one of three
results, as well as approximate charging time. |
|
|
|
| Result: |
Measures: |
| Battery OK |
Battery can be returned to
operation. |
| Charging required |
| Test found low charge level. |
| Charging starts and approximate charging duration is
displayed. |
| Achieved cold-start performance and remaining charging time
are displayed, and are updated regularly. |
|
| Renew battery |
Battery defective. Charging
procedure is interrupted. Renew battery. |
Note
| In case Midtronics -INC 940- shows fault messages or text
displays other than those listed above, please refer to
→ Chapter. |
WARNING
| Stop charging if battery is emitting a lot of gas.
Press “Stop” button on front. |
|
| When charging and testing procedure has finished, Midtronics
-INC 940- battery charger displays “Battery good” or “Renew
battery” and total charging time. |
| There are three possible messages depending on individual
circumstance (printout for warranty, repair job, evaluation and
filing): |
| Generate test code (only possible after automatic charging
and test). |
| Print last test result (for warranty). |
| Display last test results. |
Note
| For additional information, refer to the
→ operating manual INC 940. |
|
Batteries in VW vehicles may only be charged with battery
chargers approved by VW. In the USA/Canada, it is permitted for
the Midtronics -INC 940- battery charger to ...
Under certain circumstances, the display may show errors or
messages according to status.
The most frequent display messages are listed below,
...
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General description of Midtronics -INC 940- battery tester
Dealing with problems with Midtronics -INC 940- battery tester