Purge Solenoid Valve
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
Remove purge solenoid valve, located on firewall by throttle body. See Figure. Apply air pressure to purge solenoid valve port. Ensure air does not flow through purge solenoid valve vacuum ports. Using fused jumper wires, apply battery voltage to purge solenoid valve terminals. Apply air pressure to a solenoid valve port again. Air should flow through purge solenoid valve 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
Remove PCM. See COMPUTERIZED ENGINE CONTROLS in REMOVAL, OVERHAUL & INSTALLATION article. Connect 104-pin Breakout Box (49-UN01-130) to PCM harness connector only. Disconnect purge solenoid valve 2-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" (Brown/Red wire) and breakout box terminal No. 67 through common connector.
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 between following:- 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 breakout box terminal No. 67 (Brown/Red wire) through common connector.
If continuity is present, repair short circuit in suspect wire or replace wire harness.