VARIABLE TUMBLE SHUTTER VALVE ACTUATOR INSPECTION [ZY]

Motor Inspection

Caution

• The property of the variable tumble shutter valve switch built into the variable tumble shutter valve actuator is adjusted to reduce the effect caused from the production tolerance of the intake manifold and variable tumble shutter valve actuator.

• If the variable tumble shutter valve actuator is removed from the intake manifold, a significant deviation to the switching performance results. Therefore, the variable tumble shutter valve actuator cannot be removed from the intake manifold.

1. Remove the intake manifold. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [ZY].)

2. Connect the battery positive voltage to terminal B or D, and inspection that the valve operation.

• If there is no malfunction, carry out the "Circuit Open/Short Inspection".

• If there is any malfunction, replace the intake manifold. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [ZY].)

Circuit Open/Short Inspection

1. Inspect the following wiring harnesses for an open or short circuit. (Continuity check)

Open circuit

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

- Variable tumble shutter valve actuator terminal B and PCM terminal 2AG

- Variable tumble shutter valve actuator terminal D and PCM terminal 2AK

Short circuit

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

- Variable tumble shutter valve actuator terminal B and power supply

- Variable tumble shutter valve actuator terminal B and body ground

- Variable tumble shutter valve actuator terminal D and power supply

- Variable tumble shutter valve actuator terminal D and body ground