Special Tools Required

Vacuum Pump/Gauge, 0-30 in.Hg, Snap-on YA4000A or equivalent, commercially available
Vacuum/Pressure Gauge, 0-4 in.Hg, 07JAZ-001000 ■

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review GENERAL TROUBLESHOOTING INFORMATION .

Turn the ignition switch to ON (II).
Clear the DTC with the HDS.
Select EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.
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 - Go to step 4.
Turn the ignition switch to LOCK (0).
Check for poor connection, blockage, or damage at the EVAP canister purge line between the intake manifold and the EVAP canister.
Is the line OK?

YES - Go to step 6.

NO - Reconnect or repair the EVAP canister purge line, then go to step 24.
Disconnect the vacuum hose (A) from the EVAP canister purge valve (B).

Fig 1: Identifying Vacuum Hose & EVAP Canister Purge Valve
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Disconnect the vacuum hose (A) from the purge line, and connect a T-fitting (B) from the vacuum gauge and the vacuum pump/gauge, 0-30 in.Hg, to the hose as shown below.

Fig 2: Identifying Vacuum Hose & T-Fitting
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Turn the ignition switch to ON (II).
Apply about 2 kPa (0.6 in. Hg, 15 mmHg) of vacuum to the hose.
Select EVAP PCS ON in the INSPECTION MENU with the HDS.
Does the vacuum release immediately?

YES - Go to step 15.

NO - Go to step 11.
Select EVAP PCS OFF in the INSPECTION MENU with the HDS.
Disconnect the vacuum hose (A) from the EVAP canister purge valve (B). Connect a T-fitting (C) from the vacuum gauge, the vacuum pump/gauge, 0-30 in.Hg, and the EVAP canister purge valve as shown.

Fig 3: Identifying Vacuum Hose, EVAP Canister Purge Valve & T-Fitting
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Apply about 2 kPa (0.6 in.Hg, 15 mmHg) of vacuum to the hose.
Select EVAP PCS ON in the INSPECTION MENU with the HDS.
Does the vacuum release immediately?

YES - Check for a blockage in the vacuum hose between the EVAP canister purge valve and the EVAP canister, then go to step 24.

NO - Replace the EVAP canister purge valve (see EVAP CANISTER PURGE VALVE REPLACEMENT ), then go to step 24.
Connect the vacuum pump/gauge vacuum hose (A) as shown below.

Fig 4: Identifying Vacuum Hose
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Start the engine, and let it idle.
Is there vacuum?

YES - Go to step 17.

NO - Check for blockage in the vacuum hose between the EVAP canister purge valve and the intake manifold, then go to step 24.
Turn the ignition switch to LOCK (0).
Remove the FTP sensor with its connector connected (see FTP SENSOR REPLACEMENT ).
Connect a T-fitting (A) from the vacuum pump/gauge vacuum pump to the FTP sensor (B) as shown.

Fig 5: Identifying T-Fitting & FTP Sensor
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Turn the ignition switch to ON (II).
Check and record the FTP SENSOR reading in the DATA LIST with the HDS.
Slowly apply about 1.3 kPa (0.4 in.Hg, 10 mmHg) of vacuum to the hose.
Check the FTP SENSOR in the DATA LIST with the HDS.
Does the value change?

YES - Check for debris or blockage at the EVAP canister port, then go to step 24.

NO - Replace the FTP sensor (see FTP SENSOR REPLACEMENT ), then go to step 24.
Turn the ignition switch to ON (II).
Reset the PCM with the HDS.
Do PCM IDLE LEARN PROCEDURE .
Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.
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 FTP sensor, and the PCM, then go to step 1.