DTC Logic
DTC DETECTION LOGIC
DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condition | Possible cause |
P1800 | VIAS S/V-1 (Variable intake air system control solenoid valve-1) | An excessively low or high voltage signal is sent to ECM through the intake manifold tuning valve. |
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DTC CONFIRMATION PROCEDURE
1.CONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
Is 1st trip DTC detected? YES >> Proceed to EC-408, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.CHECK INTAKE MANIFOLD TUNING VALVE MOTOR POWER SUPPLY
Is the inspection result normal? YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK INTAKE MANIFOLD TUNING VALVE MOTOR POWER SUPPLY CIRCUIT
Is the inspection result normal? YES >> Perform the trouble diagnosis for power supply circuit.
NO >> Repair or replace error-detected parts.
3.CHECK INTAKE MANIFOLD TUNING VALVE MOTOR OUTPUT SIGNAL CIRCUIT
Is the inspection result normal? YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
4.CHECK INTAKE MANIFOLD TUNING VALVE MOTOR
Check the intake manifold tuning valve motor. Refer to EC-409, "Component Inspection (Intake Manifold Tuning Valve)".
Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".
NO >> Replace intake manifold assembly. Refer to EM-27, "Removal and Installation".
Component Inspection (Intake Manifold Tuning Valve)
1.CHECK INTAKE MANIFOLD TUNING VALVE MOTOR
Is the inspection result normal? YES >> INSPECTION END
NO >> Replace intake manifold. Refer to EM-27, "Removal and Installation".
Power window and door lock/unlock switch RH
Removal and Installation
REMOVAL
Release the pawls using a suitable tool and lift the power window and
door lock/unlock switch RH and finisher
as an assembly and remove.
Disconnect the harness connector from the power window and door
lock/unlock switch RH.
Release the four pawls (tw ...
Vehicle Dynamic Control (VDC) off switch
The vehicle should be driven with the Vehicle
Dynamic Control (VDC) system on for most driving
conditions.
If the vehicle is stuck in mud or snow, the VDC
system reduces the engine output to reduce
wheel spin. The engine speed will be reduced
even if the accelerator is depressed to the f ...
Regulations on the use of tire chains
Regulations regarding the use of tire chains vary depending on location
and type of road. Always check local regulations before installing
chains.
â– Tire chain installation
Observe the following precautions when installing and removing chains:
Install and remove tire chains in a safe locati ...