MX-5 Miata Mazdaspeed L4-1.8L DOHC Turbo (2004)
Variable Induction Control Solenoid: Testing and Inspection
Variable Tumble Control System (VTCS) Solenoid Valve
VARIABLE TUMBLE CONTROL SYSTEM (VTCS) SOLENOID VALVE INSPECTION
Airflow Inspection
NOTE: Perform the following test only when directed.
1. Remove the VTCS solenoid valve.
2. Inspect for airflow between each port under the following conditions:
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If as specified but the Simulation Test is failed, inspect for the following and perform the "Circuit Open/Short Inspection":
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Vacuum hose improper routing, kinks or leakage.
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If not as specified, replace the VTCS solenoid valve. (See VARIABLE TUMBLE CONTROL SYSTEM (VTCS) SOLENOID VALVE
REMOVAL/INSTALLATION.)
Circuit Open/Short Inspection
Open circuit
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Power circuit (VTCS solenoid valve connector terminal A and main relay connector terminal D through common connector)
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GND circuit (VTCS solenoid valve connector terminal B and PCM connector terminal 2N)
Short circuit
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VTCS solenoid valve connector terminal A and main relay connector terminal D through common connector to GND
