Circuits
References (WH), Commercially Available Tools:
Component Identification:
1 Check trunk or cargo space illumination, replace defective parts, if applicable.
NOTE: Unclip trunk lamp, disconnect insulated cable terminal and measure power consumption with multimeter (amps DC mode). After testing observe shut-off delay of approx. 4 min.
Total quiescent current <= 0.05 A or <= 0.085 A (vehicles with immobilizer) reached, end of test.
Specified total quiescent current exceeded:
2 Open fuse box F1, F4 (Model 202, 208, 210) and cover on light module (N7-1) (model 208, 210).
3 On vehicles with ATA lock engine hood lock with screwdriver.
4 Lock vehicle.
5 Open cover on overvoltage protector.
NOTE: Observe information UPDATE!
First check component circuits listed in information update.
6 Remove fuse for component affected.
NOTE: Remove fuse for ATA only with vehicle unlocked (alarm signal).
7 Connect test cable (6) and test adapter (13) to second multimeter (12) (amps DC mode).
8 Remove first fuse, connect second multimeter in its place and read off quiescent current after 5 sec.
Quiescent current <= 0.02A (20 mA):
Fused circuit okay.
9 Reinstall fuse, wait 5 seconds.
Then measure quiescent current consumption on all fuses according to test step 8.
NOTE: After installing the fuse or test adapter the connected components may have an increased quiescent current for a short time, for the radio this may be as high as 0.240 A (240 mA). The increased quiescent current consumption can be eliminated by switching the radio on and back off.
NOTE: On vehicles with auto-pilot system (APS) the quiescent current increases to approx. 800 mA while the processor is booting (approx. 30 minutes) after inserting the APS processor fuse.
Quiescent current > 0.02 A (20 mA):
Wait 4 minutes then read again.
The fused circuit is defective:
Determine fused components with increased quiescent current consumption.
If rated quiescent current value is still not reached:
Check unfused components with increased quiescent current consumption.