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".
Wiring diagram
Power distribution system
Wiring diagram
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Operating tips
When the engine coolant temperature and
outside air temperature are low, the air flow
from the foot outlets may not operate for a
maximum of 150 seconds. However, this is
not a malfunction. After the coolant temperature
warms up, air flow from the foot outlets
will operate normally.
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C1116 Stop lamp switch
DTC Logic
DTC DETECTION LOGIC
DTC
Display item
Malfunction detected condition
Possible cause
C1116
STOP LAMP SW
When stop lamp switch circuit is open.
Harness or connector
Stop lamp switch
ABS actuator and electric unit
(control unit)
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