Acura CSX. Instruction — page 181

01

SNR9AA8K72100090497FAAT30

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

02

03

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

04

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

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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