testing wg solenoid volt meter
- Thread starter willyson
- Start date
turbodog
Donating Member
Re: testing wg solenoid volt meter
Test Description:
Numbers below refer to circled
numbers on the diagnostic chart.
1. A Code 31 will set when the manifold absolute
pressure exceeds 205 kPa of boost for two seconds, and a Code 33 has not previously been set. Code 31 will set, but the “Check Engine” light will stay “ON” only while the overboost exists. The light will stay “ON” for 10 seconds after the condition exists and then go “OUT.”
An overboost condition could be caused by:
l CKT 471 shorted to ground
l A sticking wastegate actuator or wastegate
l A control valve stuck in the closed position With key “ON” and engine not running, the
l A cut or pinched hose solenoid should not be energized.
l A faulty ECM
l An extremely dirty air filter
With ignition shut “OFF,” the control valve solenoid is open.
2. After the 103 kPa (15 psi) is applied to valve and then the pressure source is removed, the actuator should slowly move back and close the wastegate.
If the pressure does not bleed “OFF,” the vent in the control valve solenoid could be plugged.
3. With the ignition “ON” and the diagnostic terminal grounded, the’ control valve solenoid should be energized. This closes “OFF” the manifold to the wastegate actuator.
4. Check the electrical control portion of the system.
Test Description:
Numbers below refer to circled
numbers on the diagnostic chart.
1. A Code 31 will set when the manifold absolute
pressure exceeds 205 kPa of boost for two seconds, and a Code 33 has not previously been set. Code 31 will set, but the “Check Engine” light will stay “ON” only while the overboost exists. The light will stay “ON” for 10 seconds after the condition exists and then go “OUT.”
An overboost condition could be caused by:
l CKT 471 shorted to ground
l A sticking wastegate actuator or wastegate
l A control valve stuck in the closed position With key “ON” and engine not running, the
l A cut or pinched hose solenoid should not be energized.
l A faulty ECM
l An extremely dirty air filter
With ignition shut “OFF,” the control valve solenoid is open.
2. After the 103 kPa (15 psi) is applied to valve and then the pressure source is removed, the actuator should slowly move back and close the wastegate.
If the pressure does not bleed “OFF,” the vent in the control valve solenoid could be plugged.
3. With the ignition “ON” and the diagnostic terminal grounded, the’ control valve solenoid should be energized. This closes “OFF” the manifold to the wastegate actuator.
4. Check the electrical control portion of the system.