Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA2008TRIBUTE S SPORT, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 242 (SYMPTOM TROUBLESHOOTING [ENGINE CONTROL SYSTEM 13B-MSP))ENGINE CONTROL SYSTEM OPERATION INSPECTIONAUXILIARY PORT VALVE (APV) CONTROL INSPECTION
2008 Mazda Tribute s Sport, 4WD
Auxiliary Port Valve (APV) Control Inspection
2008 Mazda Tribute s Sport, 4WDSECTION Auxiliary Port Valve (APV) Control Inspection
WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
- Connect the WDS or equivalent to the DLC-2.
- Verify DTC P2004, P2006, P2008 or P2017 is not displayed.
- If DTC P2004, P2006, P2008 or P2017 are displayed, perform DTC inspection. (See DTC TABLES .)
- Access the ECT and RPM PIDs.
- Start the engine and warm-up it above the ECT PID 70 °C {158 °F}.
- Verify that PCM terminal 3B voltage is 1.5 V or more during idle and decreases to less than 1.5 V when the engine speed is increased.
- If not as specified, proceed to next step.
- Inspect and repair or replace the following wiring harnesses and connectors for an open or short circuit.
- APV motor terminal A-PCM terminal 3B
- APV motor terminal B-PCM terminal 3J
- APV motor terminal D-PCM terminal 3G
- Remove APV motor and APV.
- Inspect for the following:
- APV motor (See AUXILIARY PORT VALVE (APV) MOTOR INSPECTION (13B-MSP (HIGH POWER)) .)
- APV (stuck open or closed)
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.