LEMON Manuals: Even more car manuals for everyone
Home >> Honda >> 2000 >> CR-V SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P1456 & P1457: EVAP System Leak Detected >> D16Y5 M/T

D16Y5 M/T

WARNING: This page is about a different car, the 2000 Honda Civic. However, it is still accessible from the selected car via links, so may be relevant.
  1. If either DTC P1456 or DTC P1457 sets, check for:
    • Faulty fuel filler cap.
    • Proper vacuum hose connections.
    • Fuel tank leak.
    • EVAP control canister Vent Shut Valve (VSV) malfunction.
    • EVAP control canister VSV circuit malfunction.
    • EVAP purge control solenoid valve malfunction.
    • EVAP purge control solenoid valve circuit malfunction.
    • EVAP by-pass solenoid valve malfunction.
    • EVAP by-pass solenoid valve circuit malfunction.
    • Fuel tank pressure sensor malfunction.
    • Fuel tank pressure sensor circuit malfunction.
    • EVAP control canister malfunction.
    • Faulty throttle body.

    Repair as necessary. If no problems are found, go to next step.

  2. Disconnect EVAP control canister Vent Shut Valve (VSV) vacuum hose from EVAP 3-way valve and connect vacuum pump to hose. See Fig 1. See VACUUM DIAGRAMS article. Remove EVAP control canister VSV from top of canister. Ensure EVAP control canister VSV 2-pin connector is connected. Turn ignition on and apply vacuum to hose. If EVAP control canister VSV does not hold a vacuum, go to next step. If EVAP control canister VSV holds a vacuum, disconnect EVAP control canister VSV 2-pin connector. Apply vacuum to EVAP control canister VSV vacuum hose. If EVAP control canister VSV holds a vacuum, replace EVAP control canister VSV. If EVAP control canister VSV does not hold a vacuum, check for short in Light Green/White wire between EVAP control canister VSV and PCM 32-pin connector "A" terminal No. 29. See Figure. See appropriate wiring diagram in WIRING DIAGRAMS article.
  3. Turn ignition off. Using backprobe set, connect a fused jumper wire between ground and PCM 32-pin connector "A" terminal No. 29 (Light Green/White wire). See Figure. Turn ignition on and apply vacuum to EVAP control canister VSV vacuum hose. If EVAP control canister VSV holds a vacuum, go to step 6)  . If EVAP control canister VSV does not hold a vacuum, go to next step.
  4. Turn ignition off. Disconnect EVAP control canister VSV 2-pin connector. Turn ignition on. Measure voltage between ground and EVAP control canister VSV 2-pin harness connector terminal No. 2 (Black/Yellow wire). If battery voltage exists, go to next step. If battery voltage does not exist, check for open in wire between EVAP control canister VSV and No. 15 ALTERNATOR SP SENSOR (7.5-amp) fuse located in underdash fuse/relay box. See appropriate wiring diagram in WIRING DIAGRAMS article.
  5. Turn ignition off. Reconnect EVAP control canister VSV 2-pin connector. Turn ignition on. Using backprobe set, measure voltage between PCM 32-pin connector "A" terminals No. 10 (Black wire) and No. 29 (Light Green/White wire). See Figure. If battery voltage does not exist, check for open in Light Green/White wire between EVAP control canister VSV and PCM 32-pin connector "A". See appropriate wiring diagram in WIRING DIAGRAMS article. If battery voltage exists, replace EVAP control canister VSV.
  6. Reconnect EVAP control canister VSV vacuum hose to EVAP 3-way valve. Disconnect EVAP purge control solenoid valve vacuum hose from EVAP canister (upper left hose). See Fig 1. See VACUUM DIAGRAMS article. Attach vacuum gauge to disconnected hose. Start engine and allow it to idle. Ensure engine coolant temperature is less than 154°F (68°C) and A/C off. Quickly increase engine speed to 3000 RPM and check for vacuum. If vacuum exists, go to next step. If vacuum does not exist, go to step  9.
  7. Disconnect EVAP purge control solenoid valve 2-pin connector. On D16Y7 engine, EVAP purge control solenoid valve is located at right side of engine, below air cleaner-to-air tube connection. On B16A2, D16Y5 and D16Y8, EVAP purge control solenoid valve is located below fuel injector rail cover. Quickly increase engine speed to 3000 RPM and check for vacuum. If vacuum does not exist, go to next step. If vacuum exists, inspect vacuum hose routing. See VACUUM DIAGRAMS article. If vacuum hose routing is okay, replace EVAP purge control solenoid valve.
  8. Turn ignition off. Disconnect PCM 32-pin connector "A". See Figure. Check for continuity between ground and EVAP purge control solenoid valve 2-pin harness connector terminal No. 2 (Red/Yellow wire). If continuity exists, check for short in Red/Yellow wire between EVAP purge control solenoid valve and PCM 32-pin connector "A" terminal No. 15. See appropriate wiring diagram in WIRING DIAGRAMS article. If continuity does not exist, substitute a known-good PCM and recheck. If symptom or problem goes away, replace original PCM.
  9. Turn ignition off. Set parking brake and block rear wheels. Raise and support front suspension with wheels off ground. Start engine and run at 3000 RPM with no loads and transmission in Park or Neutral until radiator fan comes on. Allow engine to idle. Check for vacuum at EVAP purge control solenoid valve vacuum hose with A/T in "2" position or M/T in 1st gear. Carefully increase engine speed quickly to 3000 RPM and check for vacuum. If vacuum does not exist, go to next step. If vacuum exists, Go to step  13.
  10. Turn ignition off. Disconnect EVAP purge control solenoid valve 2-pin connector. Start engine and allow it to idle at normal operating temperature. Measure voltage between EVAP purge control solenoid valve 2-pin harness connector terminals with A/T in "2" position or M/T in 1st gear. If battery voltage does not exist, go to next step. If battery voltage exists, check vacuum hose routing. If vacuum hose routing is okay, replace EVAP purge control solenoid valve.
  11. Measure voltage between ground and EVAP purge control solenoid valve 2-pin harness connector terminal No. 1 (Black/Yellow wire). If battery voltage exists, go to next step. If battery voltage does not exist, check for open in wire between EVAP purge control solenoid valve and No. 15 ALTERNATOR SP SENSOR (7.5 amp) fuse. See appropriate wiring diagram in WIRING DIAGRAMS article.
  12. Turn ignition off. Reconnect EVAP purge control solenoid valve 2-pin connector. Turn ignition on. Using backprobe set, measure voltage between PCM 32-pin connector "A" terminal A10 (Black wire) and terminal A15 (Red/Yellow wire). See Figure. If battery voltage does not exist, check for open in Red/Yellow between EVAP purge control solenoid valve and PCM 32-pin connector "A". See appropriate wiring diagram in WIRING DIAGRAMS article. If battery voltage exists, substitute a known-good PCM and recheck. If symptom or problem goes away, replace original PCM.
  13. Check EVAP 2-way valve. See EMISSION SYSTEMS & SUB SYSTEMS in SYSTEM & COMPONENT TESTING article. Replace EVAP 2-way valve if faulty. If EVAP 2-way valve is okay, disconnect vacuum hoses from EVAP 2-way valve. Connect vacuum pump to EVAP 2-way valve (port to EVAP canister) and apply vacuum. See Fig 2. Turn ignition on. If 2-way valve holds a vacuum, go to step  15. If 2-way valve does not hold a vacuum, go to next step.
  14. Disconnect EVAP by-pass solenoid valve 2-pin connector. Apply vacuum to EVAP 2-way valve hose. If 2-way valve holds a vacuum, check for short in Blue wire between EVAP by-pass solenoid valve and PCM 32-pin connector "A" terminal No. 28. See Figure. See appropriate wiring diagram in WIRING DIAGRAMS article. If 2-way valve does not hold a vacuum, replace EVAP by-pass solenoid valve.
  15. Turn ignition off. Using backprobe set, connect a fused jumper wire between ground and PCM 32-pin connector "A" terminal No. 28 (Blue wire). See Figure. Turn ignition on and apply vacuum to 2-way valve. If 2-way valve holds a vacuum, go to next step. If 2-way valve does not hold a vacuum, check following components for leakage to atmosphere, and repair or replace as necessary: fuel filler cap, fuel tank, fuel vapor pipe, EVAP 2-way valve, EVAP by-pass solenoid valve, fuel tank pressure sensor, EVAP control canister, EVAP control canister VSV, EVAP purge control solenoid valve, and vacuum hoses and connections. See VACUUM DIAGRAMS article.
  16. Turn ignition off. Disconnect EVAP by-pass solenoid valve 2-pin connector. Turn ignition on. Measure voltage between ground and EVAP by-pass solenoid valve 2-pin harness connector terminal No. 1 (Black/White wire). If battery voltage exists, go to next step. If battery voltage does not exist, check for open in Black/White wire between EVAP by-pass solenoid valve connector and No. 15 ALTERNATOR SP SENSOR (7.5 amp) fuse. See appropriate wiring diagram in WIRING DIAGRAMS article.
  17. Turn ignition off. Reconnect EVAP by-pass solenoid valve 2-pin connector. Turn ignition on. Using backprobe set, measure voltage between PCM 32-pin connector "A" terminals No. 10 (Black wire) and No. 28 (Blue wire). See Figure. If battery voltage exists, replace EVAP by-pass solenoid valve. If battery voltage does not exist, check for open in Blue wire between EVAP solenoid valve and PCM 32-pin connector "A" No. 28. See appropriate wiring diagram in WIRING DIAGRAMS article.
Fig 1: Identifying EVAP Control Canister Components
G96A09604Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig 2: Identifying EVAP 2-Way Valve (D16Y5 M/T)
G96F09606Courtesy of AMERICAN HONDA MOTOR CO., INC.
scientia non olet · About LEMON Manuals