| Checking battery - vehicles with battery monitor control unit -J367- or energy management control unit -J644- and data bus diagnostic interface -J533- |
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| On some models, the electrical system is monitored by the energy management control unit -J644- or the battery monitor control unit -J367- in connection with the data bus diagnostic interface -J533- (allocation → Current flow diagrams, Electrical fault finding and Fitting locations). The battery test for these vehicles is performed via „Guided Fault Finding“. |
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| If is not possible to check the battery in the „Guided Fault Finding“ because of a partially or totally discharged battery, the charge status of the battery can be assessed quickly via „Checking battery by measuring current draw“. |
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| Do not open maintenance-free batteries; this would invalidate the warranty. |
Caution | On the following models, checking the battery in „Guided Fault Finding“ is not possible because, depending on the version, the battery monitor control unit -J367- is installed but the data bus diagnostic interface -J533- is not: |
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