EVAP System Troubleshooting CR-V

EVAP System Troubleshooting

ElectronicCircuitSchematics-button

SystemDescription-button EVAP System Description

EVAP System Troubleshooting

Special Tools Required

Vacuum Pump/Gauge, 0 30 inHg Snap-on YA4000A or equivalent, commercially available

Vacuum/Pressure Gauge, 0 4 inHg 07JAZ-001000B

1- EVAP canister purge valve check (open stuck):

EVAP canister purge valve check (open stuck)

1- Disconnect the vacuum hose (A) from the EVAP canister (B), and connect a vacuum pump/gauge, 0 30 inHg, to the hose-

2- Start the engine, and let it idle- NOTE: The engine coolant temperature must be at least 140 °F (60 °C)- Signal

Current conditions

Values

Unit

ECT SENSOR 1

Is there vacuum

YES

Inspect the vacuum hose routing. If OK, replace the EVAP canister purge valve.

NO

Go to step 2- 2- EVAP canister purge valve check (closed stuck):

EVAP canister purge valve check (closed stuck)

1- Hold the engine speed at 3,000 rpm without load (CVT in P or N, M/T in neutral) until the radiator fan comes on, then continue to hold the engine speed at 3,000 rpm- Is there vacuum

YES

Go to step 3-

NO

Inspect the vacuum hose routing. If OK, replace the EVAP canister purge valve.

3- EVAP canister check:

EVAP canister check

1- Turn the vehicle to the OFF (LOCK) mode- 2- Reconnect the vacuum hose to the EVAP canister- 3- Remove the fuel fill cap- 4- Disconnect the purge air hose (A) from the EVAP canister (B), and connect a T-fitting (C) and a vacuum gauge to the hose as shown-

5- Start the engine, and raise the engine speed to 3,000 rpm- Does vacuum appear on gauge within 1 minute

YES

Do the EVAP two way valve test. If it is OK, the evaporative emission system is OK.

NO

Replace the EVAP canister.

Troubleshooting Start
See also:
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