Volkswagen Golf Service & Repair Manual: Charging battery

Volkswagen Golf Service & Repair Manual / Electrical system, general information / Starter- current supply- CC / Charging battery / Charging battery

Prerequisites:

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.

General description of Midtronics -INC 940- battery tester

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 ...

Dealing with problems with Midtronics -INC 940- battery tester

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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