DTC P0497
DTC P0497 : EVAP System Low Purge Flow Detected
Special Tools Required
Vacuum Pump/Gauge, 0-30 inHg Snap-on YA4000A or equivalent, commercially available
Vacuum/Pressure Gauge, 0-4 inHg 07JAZ-001000B
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P0497 EVAP System Low Purge Flow Detected |
DTC (PGM-FI)
- Problem verification
-1. Turn the vehicle to the ON mode.
-2. Clear the DTC with the HDS.
-3. Select the EVAP TEST in the INSPECTION MENU, then select the FUNCTION TEST with the HDS.
FUNCTION TEST
Is the result OK?
YES
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, the EVAP canister vent shut valve, and the PCM.
NO
The failure is duplicated. Go to step 2
- EVAP canister purge line visual check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Check for a poor connection, a blockage, or damage at the EVAP canister purge line between the throttle body and the EVAP canister.
Is the line OK?
YES
Go to step 3.
NO
Reconnect or repair the EVAP canister purge line, then do the repair verification.
- Determine possible failure area (EVAP canister purge valve, others)
-1. Disconnect the vacuum hose (purge line) (A) from the EVAP canister purge valve (B) in the engine compartment, then connect a T-fitting (C), a vacuum gauge, and a vacuum pump/gauge, 0-30 inHg, to the vacuum hose as shown.
-2. Turn the vehicle to the ON mode.
-3. Select the EVAP TEST in the INSPECTION MENU, then select the EVAP PCS ON in the SINGLE SOLENOID with the HDS.
SINGLE SOLENOID
Apply about 2 kPa (0.6 inHg, 15 mmHg) of vacuum to the hose.
Does it hold vacuum?
YES
Replace the EVAP canister purge valve , then do the repair verification.
NO
Go to step 4.
- Determine possible failure area (EVAP canister purge line, others)
-1. Select the EVAP TEST in the INSPECTION MENU, then select the EVAP PCS OFF in the SINGLE SOLENOID with the HDS.
SINGLE SOLENOID
Reconnect the vacuum hose to the EVAP canister purge valve.
-3. Disconnect the EVAP canister purge line (A) from the canister (B). Connect the T-fitting (C), the vacuum gauge, and the vacuum pump/gauge to the EVAP canister purge line as shown.
-4. Apply about 2 kPa (0.6 inHg, 15 mmHg) of vacuum to the hose.
-5. Do the EVAP PCS ON in the SINGLE SOLENOID with the HDS.
SINGLE SOLENOID
Does it hold vacuum?
YES
Check for a blockage in the purge line between the EVAP canister purge valve and the EVAP canister, then do the repair verification.
NO
Go to step 5.
- FTP sensor performance check
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Remove the FTP sensor with its connector connected .
-3. Connect the T-fitting (A) to the vacuum pump/gauge, and the vacuum gauge to the FTP sensor (B) as shown.
-4. Turn the vehicle to the ON mode.
-5. Check and record the FTP sensor reading in the DATA LIST with the HDS.
Signal Current conditions Values Unit FTP SENSOR -6. Slowly apply about 1.3 kPa (0.4 inHg, 10 mmHg) of vacuum to the hose.
NOTE: Be careful not to exceed the vacuum. If you do, the FTP sensor can be damaged.-7. Check the FTP SENSOR in the DATA LIST with the HDS.
Signal Current conditions Values Unit FTP SENSOR Does the value change?
YES
Go to step 6.
NO
Replace the FTP sensor , then do the repair verification.
- EVAP canister purge line check
-1. Reconnect the EVAP canister purge line to the canister, and reinstall the FTP sensor .
-2. Disconnect the vacuum hose (purge line) (A) from the EVAP canister purge valve (B) in the engine compartment, then connect the T-fitting (C), the vacuum gauge, and the vacuum pump/gauge to the vacuum hose as shown.
-3. Do the EVAP CVS ON in the SINGLE SOLENOID with the HDS.
SINGLE SOLENOID
Slowly apply about 2 kPa (0.6 inHg, 15 mmHg) of vacuum to the hose.
Does the hose hold vacuum?
YES
Check for a blockage at the EVAP canister purge line port, then do the repair verification.
NO
Replace the EVAP canister vent shut valve , then do the repair verification.
- Repair verification
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Install the parts in the reverse order of removal.
-3. Turn the vehicle to the ON mode.
-4. Reset the PCM with the HDS .
Reset PCM
-5. Do the PCM idle learn procedure .
-6. Select the EVAP TEST in the INSPECTION MENU, then select the FUNCTION TEST with the HDS.
FUNCTION TEST
Is the result OK?
YES
Troubleshooting is complete.
NO
Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, the EVAP canister vent shut valve, and the PCM, then go to step 1.