Special Tools Required

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 GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch 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 and the ECM/PCM.

NO - Go to step 4.
Turn the ignition switch to LOCK (0).
Check for a loose, clogged, or damaged at EVAP canister purge line between the throttle body 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 from the EVAP canister purge line (EVAP canister side), and connect a T-fitting (A) between the vacuum gauge and the vacuum pump/gauge, 0-30 in.Hg, as shown below.

Fig 2: Identifying EVAP Canister Purge Line & 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 - Go to step 15.

NO - Go to step 10.
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) between the vacuum pump/gauge, 0-30 in.Hg, the vacuum pump, and the EVAP canister purge valve as shown.

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

YES - Check for blockage in the vacuum hose between the EVAP canister purge valve and 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, 0-30 in.Hg, to the 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 throttle body, then go to step 24.
Turn the ignition switch OFF.
Remove the FTP sensor with its connector connected (see FTP SENSOR REPLACEMENT ).
Connect a T-fitting (A) between the vacuum pump/gauge, 0-30 in.Hg, the vacuum pump, and the FTP sensor (B) as shown below.

Fig 5: Identifying Vacuum Pump & FTP Sensor
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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 - Go to step 23.
Replace the FTP sensor (see FTP SENSOR REPLACEMENT ).
Reconnect all hoses.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do ECM/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 and the ECM/PCM, then go to step 1.