Circuit Open/Short Inspection; Open Circuit; Short Circuit - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• If there is no malfunction, carry out the "Circuit Open/Short Inspection".
• If there is any malfunction, replace the variable intake-air shutter valve actuator.
Terminal
Gear rotation direction
A B
B+ GND Counterclockwise
GND B+ Clockwise

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 intake-air shutter valve actuator terminal A and PCM terminal 2AO
- Variable intake-air shutter valve actuator terminal B and PCM terminal 2AS

Short circuit

• If there is continuity, the circuit is shorted. Repair or replace the wiring harness.
- Variable intake-air shutter valve actuator terminal A and power supply
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