Omega B
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This TI replaces TI - C - 19, N - 83 dated January 1989
Subject:
Battery Charging and Discharging - Quiescent Current Check
Vehicles:
All
Condition:
Complaints about battery discharges, which are particularly prevalent during colder seasons, have given cause for a new edition of and supplement to the TI - C - 19, N - 83, January 1989.
Cause:
Long periods of disuse, extreme operating conditions, e. g. due to short trips, frequent stops, longer journeys at low engine speeds, increased current consumption with heated rear screen, auxiliary headlamps, air conditioning, telephone and service installed accessories.
Remedy:
1. Vehicles in storage - disconnect the battery
2. Inform the customer that under extreme conditions current consumers not absolutely required (see page 1) are switched off.
3. Tuning the battery and alternator output for service - installed electrical accessories.
4. Quiescent current check
For customer complaints that the battery discharges too quickly, check the total vehicle quiescent current.
Ignition OFF. If the total vehicle quiescent current - ampere measurement with Multimeter MKM -587 - A between the battery's negative terminal and disconnected ground lead - amounts to more than 60 mA, check the individual consumers.
Note:
The maximum quiescent current per consumer in a vehicle is 5 mA. To facilitate speedier trouble - shooting or fault localization, using the circuit diagram of the valid Model Year remove the relevant fuses from the fuse box while measuring and check the multimeter display. If several consumers are protected by one fuse, carry out a separate measurement on each control unit.
Time Allowance:
N 0007 00 Quiescent Current .2 hrs TC: 99
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