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Hyundai Equus: Repair procedures - Evaporative Emission Control System - Emission Control System - Hyundai Equus VI 2009-2025 Service ManualHyundai Equus: Repair procedures

Second generation VI (2009–2025) / Hyundai Equus VI 2009-2025 Service Manual / Emission Control System / Evaporative Emission Control System / Repair procedures

Inspection
[System Inspection]
1.
Disconnect the vapor hose from the throttle body and connect a vacuum pump to the nipple on the throttle body.
2.
Check the following points with applying vacuum using the vacuum pump.
· At Cold Engine [Engine Coolant Temperature < 60°C(140°F)]
Engine
Operating
Condition
Applied
Vacuum
Result
Idle
0.5kgf/cmx
(50kPa,7.3psi)
Vacuum is held
3,000rpm

· At Warmed Engine [Engine Coolant Temperature > 80°C(176°F)]
Engine
Operating
Condition
Applied
Vacuum
Result
Idle
0.5kgf/cmx
(50kPa,7.3psi)
Vacuum is held
Within 3 minutes after engine start at 3,000 rpm
 Try to apply vacuum
 Vacuum is released
In 3 minutes after engine start at 3,000 rpm
0.5kgf/cmx
(50kPa,7.3psi)
 Vacuum will be held momentarily, after which, it will be released

[PCSV Inspection]
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Disconnect the PCSV connector (A).
3.
Disconnect the vapor hose (B) which is connected with the intake manifold from the PCSV.

4.
After connecting a vacuum pump to the nipple, apply vacuum.
5.
With the PCSV control line grounded, check valve operation when applying battery voltage to the PCSV or not.
Battery Voltage
Valve
Vacuum
Connected
Open
Released
Disconnected
Close
Maintained

6.
Measure the coil resistance of the PCSV.
Specification: 14.0 ~ 18.0x [20°C(68°F)]
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