Purge Solenoid Valve - Miata

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.

Airflow Inspection

Disconnect purge solenoid valve 2-pin harness connector and vacuum hoses. Purge solenoid valve is located by throttle body. See Figure. Ensure air does not flow through purge solenoid valve vacuum ports. Using fused jumper wires. Connect battery voltage to purge solenoid valve terminals. Air should pass through vacuum ports. If purge solenoid valve operates as specified, check for open or short circuit. Go to next step. If purge solenoid valve does not operate as specified, replace purge solenoid valve.

Open Circuit Inspection

Disconnect PCM 24-pin harness connector. Check for continuity between following terminals:
- Purge solenoid valve harness connector terminal "A" and main relay 4-pin harness connector terminal "D" (White/Red wire) through common connector.
- Purge solenoid valve harness connector terminal "B" and PCM 24-pin harness connector terminal No. 3C (Green/Yellow wire).
If continuity is present, go to next step. If continuity is not present, repair open circuit in suspect wire or replace wire harness. See appropriate WIRING DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS.

Short Circuit Inspection

Check for continuity in Green/Yellow wire between purge solenoid valve harness connector terminal "B" and PCM 24-pin harness connector terminal No. 3C to ground. If continuity is present, repair short circuit in Green/Yellow wire between purge solenoid valve harness connector terminal "B" and PCM 24-pin harness connector terminal No. 3C or replace wire harness.