S 600 (140.057) V12-6.0L (120.982) (1998)
Fuse for auto pilot system (when present)
remove.
Multimeter (2)
disconnect from negative pole of battery (3).
Connector or connection on possible quiescent current consumer
disconnect and tie back safe from contact (determine connector or connection in wiring diagram.
Multimeter (2)
connect to negative pole on battery (3) and wait approx. 4 minutes(after-running time for electronic components).
NOTE: The quiescent current consumption can increase by approx. 0.240 A (240 mA) due to the radio.
This high quiescent current consumption can be eliminated by switching the radio on and off again.
Read off quiescent current on multimeter (2) and compare with noted value
If total quiescent current drops by <= 0.02 A (20 mA) or <= 0.035 A (35 mA) on vehicles with immobilizer control module.
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Component is okay.
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Connect multimeter (2) to negative pole of battery (3).
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Reconnect connector or connection to component.
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Repeat test as described on all possible quiescent current consumers.
If total quiescent current drops by >0.02 A (20 mA) or >0.035 A (35 mA) on vehicles with immobilizer control module.
-
Replace component.
Check total quiescent current consumption on multimeter (2)
readout <= 0.05 A (50 mA) or <= 0.085 A (85 mA) on vehicles with immobilizer.
-
End of test.
NOTE: On vehicles with anti-theft warning system (ATA) unlock engine hood lock on right.
Readout >0.05 A (50 mA) or >0.085 A (85 mA on vehicles with immobilizer)
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Perform test as described on unfused quiescent current consumers not yet tested.
Commercially available tester
Multimeter
e.g. Sun DMM-5
e.g. Fluke, 88
Testing Battery Capacity (Load Test)
Preliminary work:
Checking state of charge, See: Check Condition of Battery