Preparing test with quiescent current retention unit - AR54.10-P-1030-01I

Fig 1: Identifying Electrical Connection Set (201 589 00 99 00)

Work procedures shown on model 220 

1. Switch on quiescent current retention unit (7).
2. Connect quiescent current retention unit (7) as follows:
   • Connect positive terminal (8) of quiescent current retention unit (7) to the positive lead of the battery.
   • Connect negative terminal (9) of the quiescent current retention unit (7) to ground (battery) (W10).
     Fig 2: Identifying Quiescent Current Retention Unit, Positive And Negative Terminal - Shows On Model 220

     
3. Disconnect negative terminal (1) from battery.
4. Connect the multimeter as follows; use the "electrical connection kit" for this purpose:
   • Connect positive test cable (+) to negative battery cable (1).
   • Connect negative test cable (-) to negative battery terminal (3).
     Fig 3: Identifying Battery Cable And Terminals

     
5. Switch on multimeter (2) (do not select measuring range in amp(s) too small. When the central locking system operates, a current of about 20 A  flows).
6. Switch off and disconnect quiescent current retention unit.
7. Take multimeter (2) out of the luggage compartment.

   The measurement cables (6) must not loosen in the process.

8. Close trunk lid.
   Fig 4: Identifying Multimeter And Measurement Cables