Acura TSX / Honda Accord CL. Manual - part 575

NO -Repair open in the wire between the PSP switch and G201.

BRAKE PEDAL POSITION SWITCH SIGNAL CIRCUIT TROUBLESHOOTING 

1. Turn the ignition switch ON (II).  

2. Check the BRAKE SWITCH in the DATA LIST with the HDS. 

Does it indicate OFF? 

YES -Go to step 3. 

NO -Inspect the brake pedal position switch (see BRAKE PEDAL HEIGHT & FREE PLAY ). 

3. Press the brake pedal, and check the BRAKE SWITCH in the DATA LIST with the HDS. 

Does it change to ON? 

YES -The brake pedal position switch signal circuit (BKSW line) is OK. 

NO -Go to step 4. 

4. Turn the ignition switch OFF.  

5. Jump the SCS line with the HDS.  

6. Disconnect the brake pedal position switch 4P connector.  

7. Disconnect ECM/PCM connector E (31P).  

8. Check for continuity between ECM/PCM connector terminal E22 and body ground. 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE Idle Control System - TSX

  

 

Fig. 12: Checking For Continuity Between ECM/PCM Connector Terminal E22 And Body Ground

Is there continuity? 

YES -Repair short in the wire between the ECM/PCM (E22) and the No. 13 HORN, STOP (20A) fuse. 
Replace the No. 13 HORN, STOP (20A) fuse. 

NO -Go to step 9. 

9. Check for continuity between ECM/PCM connector terminal E22 and brake pedal position switch 4P 

connector terminal No. 2. 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE Idle Control System - TSX

  

 

Fig. 13: Checking For Continuity Between ECM/PCM Connector Terminal E22 And Brake Pedal 
Position Switch 4P Connector Terminal No. 2 

Is there continuity? 

YES -Repair open in the wire between the brake pedal position switch and the No. 13 HORN, STOP 
(20A) fuse. Inspect the brake position switch (see BRAKE PEDAL HEIGHT & FREE PLAY ). 

NO -Repair open in the wire between the ECM/PCM (E22) and the brake pedal position switch. 

IDLE SPEED INSPECTION 

NOTE:

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Before checking the idle speed, check these items: 

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The malfunction indicator lamp (MIL) has not been reported on. 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE Idle Control System - TSX

  

 

1. Disconnect the evaporative emission (EVAP) canister purge valve connector.  

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

Fig. 14: Connecting The HDS To The Data Link Connector (DLC) Located Under The Driver's 
Side Of The Dashboard 

3. 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.  

4. Check the idle speed with no-load conditions: headlights, blower fan, radiator fan, and air conditioner off. 

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Ignition timing  

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Spark plugs  

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Air cleaner  

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PCV system  

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Pull the parking brake lever up.  

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE Idle Control System - TSX