|  |  | Results of the tests | 
| 0 | PRELIMINARY CHECK | All OK | Problems met | Operation | 
|---|
|  | Check
CID battery charge status. | Continue to Step 1 | Battery charge status
insufficient. | Change the CID battery | 
| 1 | PROTECTIVE FUSE CHECK | All OK | Problems met | Operation | 
|---|
|  | Check
the condition of the fuse in the boot control unit  See   E7018  PASSIVE ENTRY | Continue to Step 2 | Fuse blown | Change fuse  See   E7018  PASSIVE ENTRY | 
| 2 | CHECKING WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation | 
|---|
|  | Connect
the tester and check for errors in the passive entry node. | Continue to Step 3 | Faults present | Continue following the instructions
for the diagnostic equipment. | 
| 3 | CHECKING ELECTRICAL CIRCUIT | All OK | Problems met | Operation | 
|---|
|  | Check
the passive entry node is properly supplied. In particular, check
the supply and earth lines are not broken.  See   E7018  PASSIVE ENTRY | Continue to Step 4 | Electrical supply lead
broken or not insulated. | Restore electrical connection continuity/insulation  See   E7018  PASSIVE ENTRY | 
| Electrical earth connection broken or not insulated. | Restore electrical connection continuity/insulation  See   E7018  PASSIVE ENTRY | 
| 4 | CHECKING CORRECT OPERATION | All OK | Problems met | Operation | 
|---|
|  | Check
that the fault is no longer present |  | The fault persists | Change the passive entry
node  Op.   5580E70   Search for the fault starting
from another symptom' |