Acura TSX / Honda Accord CL. Manual — part 576

Idle speed should be:

Fig. 15: Idle Speed Specifications Table (No-Load)

5. Let the engine idle for 1 minute with the heater fan switch on HI and air conditioner on, then check the

idle speed.

Idle speed should be:

Fig. 16: Idle Speed Specifications Table (With Load)

6. Reconnect the EVAP canister purge valve connector.

ECM/PCM IDLE LEARN PROCEDURE

The idle learn procedure must be done so the ECM/PCM can learn the engine idle characteristics.

Do the idle learn procedure whenever you do any of these actions:

z

The ECM/PCM is replaced.

z

The ECM/PCM is reset.

NOTE:

If the idle speed is not within specification, do the ECM/PCM idle learn
procedure (see ECM/PCM IDLE LEARN PROCEDURE ). If the idle is still out
of specification, go to the Symptom Troubleshooting Index.

NOTE:

Erasing DTCs with the HDS does not require you to do the idle learn

2004 Acura TSX

2004 ENGINE PERFORMANCE Idle Control System - TSX

z

The throttle body is replaced.

PROCEDURE:

1. Make sure all electrical items (A/C, audio, rear window defogger, lights, etc.,) are off.

2. Do the ECM/PCM RESET in the CLEAR MENU with the HDS.

3. Turn the ignition switch ON (II), and wait for 2 seconds.

4. Start the engine, and hold it at 3,000 RPM with no load (in Park or neutral) until the radiator fan comes

on, or until the engine coolant temperature reaches 194°F (90°C).

5. Let the engine idle for about 5 minutes with the throttle fully closed.

procedure.

NOTE:

If the radiator fan comes on, do not include its running time in the 5 minutes.

2004 Acura TSX

2004 ENGINE PERFORMANCE Idle Control System - TSX

2004 ENGINE PERFORMANCE

Intake Air System - TSX

COMPONENT LOCATION INDEX

Fig. 1: Locating Intake Air System Components

THROTTLE BODY TEST

1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.

2004 Acura TSX

2004 ENGINE PERFORMANCE Intake Air System - TSX

2004 Acura TSX

2004 ENGINE PERFORMANCE Intake Air System - TSX

Fig. 2: Connecting The HDS To The Data Link Connector (DLC) Located Under The Driver's Side
Of The Dashboard

2. Start the engine. Hold the engine at 3,000 RPM with no load (in Park or neutral) until the radiator fan

comes on, then let it idle.

3. Check the TP SENSOR A in the DATA LIST with the HDS. The reading should be above 2.73%. If it is

not, clean the throttle body (see THROTTLE BODY CLEANING ).

THROTTLE BODY CLEANING

1. Check for damage to the air cleaner.

2. Remove the throttle body (see THROTTLE BODY REMOVAL/INSTALLATION ).

CAUTION:

z

Do not insert your fingers into the installed throttle body when you
turn the ignition switch ON (II) or while the ignition switch is ON (II). If
you do, there will be serious injury to your fingers if the throttle body
is activated.

2004 Acura TSX

2004 ENGINE PERFORMANCE Intake Air System - TSX