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EVAP Bypass Solenoid Valve Test

WARNING: This page is about a different car, the 2000 Honda Prelude. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect vacuum hose, located between EVAP 2-way valve and EVAP control canister, from EVAP 2-way valve. See Fig 1 . Using backprobe set, connect a fused jumper wire between ground and PCM 32-pin connector "A" terminal No. 28 (Green/White wire). See Figure . Turn ignition on. Using vacuum pump, slowly apply vacuum to EVAP 2-way valve as illustrated. See Fig 1 . If vacuum holds, go to next step. If vacuum does not hold, EVAP bypass solenoid valve and EVAP 2-way valve are okay at this time. Perform EVAP control canister Vent Shut Valve (VSV) test. See EVAP CONTROL CANISTER VENT SHUT VALVE (VSV) TEST  .
  2. Turn ignition off. Disconnect EVAP bypass solenoid valve connector. Check for continuity between ground and EVAP bypass solenoid valve harness connector terminal No. 2 (Green/White wire). If continuity exists, go to next step. If continuity does not exist, repair open in Green/White wire between EVAP bypass solenoid valve and PCM 32-pin connector "A" terminal No. 28.
  3. Turn ignition on. Measure voltage between ground and EVAP bypass solenoid valve harness connector terminal No. 1 (Black/Yellow wire). If battery voltage exists, replace EVAP bypass solenoid valve and "O" rings. If battery voltage does not exist, repair open in Black/Yellow wire between EVAP bypass solenoid valve and No. 14 PCM (15-amp) fuse, located in drivers side under dash fuse/relay box.
Fig 1: Locating EVAP 2-Way Valve Vacuum Hoses
G96D09605Courtesy of AMERICAN HONDA MOTOR CO., INC.
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