P1800
P1800 VIAS Control Solenoid Valve 1Component Description
The VIAS control solenoid valve cuts the intake manifold vacuum signal for power valve control. It responds to ON/OFF signals from the ECM. When the solenoid is off, the vacuum signal from the intake manifold is cut. When the ECM sends an ON signal the coil pulls the plunger downward and sends the vacuum signal to the power valve actuator.
On Board Diagnosis Logic
The MIL will not illuminate for this self-diagnosis.
P1800:
DTC Confirmation Procedure
NOTE: If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 11V at idle.
1. Start engine and let it idle for at least 5 seconds.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to [P1800 VIAS Control Solenoid Valve 1].
Diagnosis Procedure
Step 1-2:
Step 3-5:
Component Inspection
VIAS CONTROL SOLENOID VALVE
With SDT
1. Reconnect harness connectors disconnected.
2. Turn ignition switch ON.
3. Perform "VIAS SOL VALVE" in "Active test" mode.
4. Check air passage continuity and operation delay time under the following conditions.
Operation takes less than 1 second.
With GST
Check air passage continuity and operation delay time under the following conditions.
Operation takes less than 1 second.