Kia Optima: NVLD(Natural Vacuum Leakage Detection) Repair procedures
| Removal |
| 1. |
Turn the ignition switch OFF and disconnect the battery negative (-) terminal. |
| 2. |
Disconnect the NVLD connector (A). |
| 3. |
Disconnect the ventilation hoses (B,C).
|
| 4. |
Remove the NVLD after by loosening the bolts (A).
|
| Installation |
| • |
Install the component with the specified torques. |
| • |
Note that internal damage may occur when the component is dropped.
If the component has been dropped, inspect before installing.
|
| 1. |
Install in the reverse order of removal. |
NVLD mounting bolt:
2.3 ~ 3.3 N.m (0.2 ~ 0.3 kgf.m, 1.7 ~ 2.5 lb-ft) |
| Inspection |
[Mechanical inspection]
| 1. |
Turn ignition switch OFF. |
| 2. |
Disconnect the NVLD connector. |
| 3. |
Remove the NVLD. |
| 4. |
Connect the hose (A) to the canister hose connected port as below. |
| 5. |
After immersing the hose (A) in water, Apply more than 6 mbar (positive) pressure to Atmosphere port (B). |
| 6. |
If the NVLD is normal, many bubbles will indicate large leak.
|
[Electrical inspection]
| 1. |
Connect power supply line and ground line to the NVLD terminals as below. |
| 2. |
Measure current between the NVLD terminal 1 and battery (+) terminal during NVLD switch open. |
| 3. |
Measure current between the NVLD terminal 1 and battery (+) terminal during NVLD switch closed. |
| 4. |
Measure current between the NVLD terminal 2 and battery (+) terminal during NVLD switch open. |
| 5. |
Check the current is within the specification.
|
NVLD(Natural Vacuum Leakage Detection) Schematic Diagrams
Circuit Diagram
...
Canister Close Valve (CCV) Description and Operation
Description
Canister Close Valve (CCV) is installed on the canister
ventilation line. It seals evaporative emission control system by
shutting the canister from the atmosphere when leakage dete ...
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