2008 - MX-5 - Engine

VARIABLE TUMBLE SOLENOID VALVE INSPECTION [LF]

AT

NOTE:

• Perform the following inspection only when directed.

Airflow Inspection

1. Remove the battery cover.

2. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [LF].)

3. Remove the variable tumble solenoid valve. (See VARIABLE TUMBLE SOLENOID VALVE REMOVAL/INSTALLATION [LF].)

4. Inspect airflow between the ports under the following conditions.

• If not as specified, replace the variable tumble solenoid valve.

• If as specified, carry out the “Circuit Open/Short Inspection”.

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [LF].)

2. Inspect the following wiring harness for open or short (continuity check).

Open circuit

• If there is no continuity, the circuit is open. Repair or replace the wiring harness.

• Variable tumble solenoid valve terminal B and PCM terminal 2I

• Variable tumble solenoid valve terminal A and main relay

Short circuit

• If there is continuity, the circuit is shorted. Repair or replace the wiring harness.

• Variable tumble solenoid valve terminal B and power supply

• Variable tumble solenoid valve terminal B and body ground

• Variable tumble solenoid valve terminal A and body ground