Acura CSX. Manual — part 181
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01
SNR9AA8K72100090497FAAT30
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DTC P0497:
Special Tools Required
YES
NO
YES
NO
YES
NO
YES
NO
11-392
EVAP System
A
C
07JAZ-001000B
B
EVAP System Low Purge Flow
Detected
• Vacuum/pressure gauge, 0
4 in.Hg, 07JAZ-001000B
• Vacuum pump/gauge, 0
30 in.Hg, Snap-on YA4000A
or equivalent, commercially available
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
1. Check the fuel fill cap installation (The cap must say
TIGHTEN TO CLICK. The cap should tighten 1/4 turn
after it is tight.).
Go to step 2.
Properly install the fuel fill cap, then go to
step 23.
2. Turn the ignition switch to ON (II).
3. Clear the DTC with the HDS.
4. Do the EVAP FUNCTION TEST in the INSPECTION
MENU with the HDS.
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 ECM/
PCM.
Go to step 5.
5. Check for a loose or damaged EVAP canister purge
line between the intake manifold and the EVAP
canister purge valve.
Go to step 6.
Reconnect or repair the EVAP canister purge
line, then go to step 23.
6. Disconnect the vacuum hose (A) from the EVAP
canister purge valve (B) in the engine compartment,
and connect a T-fitting (C) between the vacuum
gauge, the vacuum pump/gauge, 0
30 in.Hg, and
the vacuum hose as shown.
7. Select EVAP PCS ON in the INSPECTION MENU
with the HDS.
8. Slowly apply about 2 kPa (15 mmHg, 0.6 in.Hg) of
vacuum to the hose.
Replace the EVAP canister purge valve, then
go to step 22.
Go to step 9.
Is the f uel f ill cap installed and pr oper ly
tightened?
Is the r esult OK ?
Is the line OK ?
Does it hold vacuum?
08/08/21 14:33:20 61SNR030_110_0392
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02
03
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YES
NO
11-393
A
07JAZ-001000B
A
B
9. Reconnect the vacuum hose to the EVAP canister
purge valve.
10. Disconnect the vacuum hose from the purge line (at
the EVAP canister side), and connect a T-fitting (A)
between the vacuum gauge and the vacuum pump/
gauge, 0
30 in.Hg, as shown.
11. Select EVAP PCS ON in the INSPECTION MENU
with the HDS.
12. Slowly apply about 2 kPa (15 mmHg, 0.6 in.Hg) of
vacuum to the hose.
Check for a restricted EVAP canister purge
line between the EVAP canister purge valve and the
EVAP canister, then go to step 22.
Go to step 13.
13. Remove the FTP sensor with its connector
connected (see page 11-408).
14. Connect a T-fitting (A) between the vacuum pump/
gauge, 0
30 in.Hg, the vacuum pump, and the FTP
sensor (B) as shown.
15. Check and record the FTP SENSOR reading in the
DATA LIST with the HDS.
16. Slowly apply about 1.3 kPa (10 mmHg, 0.4 in.Hg) of
vacuum to the hose.
Does it hold vacuum?
08/08/21 14:33:21 61SNR030_110_0393
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04
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YES
NO
YES
NO
YES
NO
11-394
EVAP System
C
A
B
07JAZ-00100B
17. Check the FTP SENSOR in the DATA LIST with the
HDS.
Go to step 18.
Replace the FTP sensor (see page 11-408),
then go to step 22.
18. Reconnect the vacuum hoses to the EVAP canister
purge line (EVAP canister side), and reinstall the
FTP sensor.
19. Disconnect the vacuum hose (purge line) (A) from
the EVAP canister purge valve (B), and connect a
T-fitting (C) between the vacuum gauge and the
vacuum pump/gauge, 0
30 in.Hg, as shown.
20. Select EVAP CVS ON in the INSPECTION MENU
with the HDS.
21. Slowly apply about 2 kPa (15 mmHg, 0.6 in.Hg) of
vacuum to the hose.
Check for a blockage at the EVAP canister
port, then go to step 22.
Replace the EVAP canister vent shut valve
(see page 11-409), then go to step 22.
22. Reconnect all hoses.
23. Turn the ignition switch to ON (II).
24. Reset the ECM/PCM with the HDS.
25. Do the ECM/PCM idle learn procedure (see page
11-310).
26. Do the EVAP FUNCTION TEST in the INSPECTION
MENU with the HDS.
Troubleshooting is complete.
Check for poor connections or loose terminals
at the FTP sensor, the EVAP canister purge valve,
the EVAP canister vent shut valve, and the ECM/
PCM, then go to step 1.
Is the dif f er ence mor e than 1.1 kPa ( 8 mmHg,
0.31 in.Hg) bef or e and af ter applying vacuum?
Does the hose hold vacuum?
Is the r esult OK ?
08/08/21 14:33:21 61SNR030_110_0394
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−
01
SNR9AA9K72100090497FAAT30
−
−
−
−
DTC P0497:
Special Tools Required
YES
NO
YES
NO
11-395
A
B
EVAP System Low Purge Flow
Detected
• Vacuum/pressure gauge, 0
4 in.Hg 07JAZ-001000B
• Vacuum pump/gauge, 0
30 in.Hg, Snap-on YA4000A
or equivalent, commercially available
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Do the EVAP FUNCTION TEST in the INSPECTION
MENU with the HDS.
Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at the FTP sensor and the ECM.
Go to step 4.
4. Turn the ignition switch to LOCK (0).
5. Check for poor connections, blockage, or damage
at the EVAP canister purge line between the throttle
body and the EVAP canister.
Go to step 5.
Reconnect or repair the EVAP canister purge
line, then go to step 25.
6. Disconnect the vacuum hose (A) from the EVAP
canister purge valve (B).
Is the r esult OK ?
Is the line OK ?
08/08/21 14:33:21 61SNR030_110_0395
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