Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
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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.
- IAC valve terminal A and PCM terminal 2X
- IAC valve terminal B and PCM terminal 2AB
Short circuit
• If there is continuity, the circuit is shorted. Repair or replace the wiring harness.
- IAC valve terminal A and body GND
- IAC valve terminal B and power supply
VARIABLE INTAKE-AIR SHUTTER VALVE ACTUATOR
REMOVAL/INSTALLATION [Z6]
B3E011320130W01
Caution
• Be careful of the following after removing the actuator to prevent abnormal gear wear and gear
lock which could result in shutter valve malfunction.
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