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Home >> Mazda >> 2007 >> B4000 SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 64 (Engine Controls [System & Component Testing]) >> Idle Control System >> System Check
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System Check

WARNING: This page is about a different car, the 2003 Mazda Protege5, 2003 Mazda Protege, 2003 Mazda MX-5 Miata, 2003 Mazda MPV, and 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ensure engine is at ambient temperature. Connect scan tool to DLC-2. Using PID/DATA MONITOR AND RECORD function, select ECT and RPM PIDs. Start engine.
  2. Engine speed should decrease as engine reaches operating temperature. If engine speed does not decrease or decreases slowly, check ECT sensor, IAC valve and related wiring.
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