2008 - MX-5 - Engine

VARIABLE TUMBLE SHUTTER VALVE SWITCH INSPECTION [LF]

NOTE:

• Perform the following inspection only when directed.

Voltage Inspection

1. Turn the ignition switch to the ON position (Engine off).

2. Verify that the PCM terminal 2AE voltage is as shown in the following table when the variable tumble shutter valve actuator rod is depressed and released by hand.

• If not as specified, perform the “Circuit Open/Short Inspection”.

• If there is no open or short circuit, replace the intake manifold. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [LF].)

Variable tumble shutter valve switch output voltage

Condition	PCM terminal 2AE
Released (Open position)	B+
Depressed (Closed position)	Below 1.0

Circuit Open/Short Inspection

1. Disconnect the PCM connector.

2. Inspect the following harness for an open or short wiring. (Continuity inspection)

Open circuit

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

• Variable tumble shutter valve switch terminal A and PCM terminal 2AE

• Variable tumble shutter valve switch terminal B and body ground

Short circuit

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

• Variable tumble shutter valve switch terminal A and body ground

• Variable tumble shutter valve switch terminal B and power supply