Determining circuit with increased quiescent current consumption - AR54.10-P-1030-04C

	Determining circuit with increased quiescent current consumption	Nominal value ≤ 0.02 A (20 mA): ↓
		Determine fused components in which quiescent current is too high	AR54.10-P-1030-05AB
		To check test quiescent current again. Nominal value ≤ 0.05 A (50 mA) or 0.09 A: ↓	AR54.10-P-1030-03C
		Determine unfused components in which quiescent current is too high	AR54.10-P-1030-06AB
		To check test quiescent current again	AR54.10-P-1030-03C

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

Fig 2: Identifying Quiescent Current Test Adapter 1 (140 589 12 21 00)

Fig 3: Identifying Quiescent Current Test Adapter 2 (140 589 13 21 00)

Fig 4: Identifying Test Adapter, Second Multimeter And Test Cable

1. Check trunk illumination, if necessary replace damaged part.

   

   Unclip trunk lamp, pull off insulated terminal and measure current with multimeter (amps range). After checking observe after-running time of approx. 10 min. again.

   If total current consumption is ≤ 0.05 A or ≤ 0.09 A 

   (vehicles with alarm system code 551), end of test:

   If total quiescent current  is not reached: ↓

2. Open fuse boxes F1, F4 and light module cover (N7-1).
3. On vehicles with ATA, lock engine hood lock with screwdriver.
4. Lock vehicle.
5. Open cover on overvoltage protection device.

   

   Observe information update (AI)!

   Observe information update (AI)!

   First check circuits for components listed in the information update.

6. Remove fuse for affected component.

   

   Remove fuse for ATA only with vehicle unlocked (alarm signal).

7. Connect test cable (6) and test adapter (13) to a second multimeter (12) (amps mode).
8. Pull out first fuse and connect second multimeter in its place. Read off quiescent current after waiting 5 seconds.

   Quiescent current ≤ 0.02A (20 mA): 

   The fused circuit is okay.

9. Reinstall fuse, wait 5 seconds.

   Then check quiescent current for all fuses according to test step  8.

After reinstalling the fuses or the test adapter, the connected components may have an increased quiescent current momentarily; the quiescent current for the radio may be as high as 0.240 A (240 mA). The increased quiescent current consumption is eliminated by switching the radio on and off again.

Quiescent current > 0.02 A (20 mA): 

The fused circuit is defective: ↓

Determine fused components for which quiescent current is too high. If nominal value for total quiescent current  is still not reached: ↓

Determine unfused components for which quiescent current is too high.