Purge Control Solenoid Valve
- Label and disconnect both vacuum hoses from solenoid valve. Disconnect electrical connector. Connect hand vacuum pump to solenoid valve nipple where Red-striped hose was connected. Apply vacuum to solenoid valve. Vacuum should hold.
- Apply battery voltage to terminals of solenoid valve. Vacuum should bleed down when voltage is applied to terminals. Using an ohmmeter, check resistance across solenoid valve terminals. Reading should be 36-44 ohms at 68°F (20°C). If reading is not within specification, replace valve.
- This step checks voltage at purge solenoid. Disconnect purge solenoid harness connector. Turn ignition on. Using DVOM, measure voltage at harness connector terminal No. 2 (vertical terminal). If voltage is battery voltage, go to step 4. If voltage is not battery voltage, check and repair circuit between purge solenoid and MPI control relay.
- This step checks continuity between ECM and purge solenoid. Disconnect ECM harness connector. Connect jumper wire between ECM terminal and vehicle ground. See ECM TERMINAL ID
table.
- Using DVOM, check for continuity between purge solenoid harness connector terminal No. 1 (horizontal terminal) and vehicle ground. If continuity exists, harness is good. If continuity does not exist, check and repair circuit.
- If preceding tests do not show any system or component malfunction and ECM is suspected, replace ECM and retest system.
ECM TERMINAL ID
| Application |
Terminal Number |
| Eclipse |
62 |
| Galant |
9 |