Acura TSX / Honda Accord CL. Manual - part 506

Fig. 6: Measuring Voltage Between Ignition Coil Relay 4P Socket Terminals And Body 
Ground 

4. Check for continuity between ignition coil relay 4P socket terminal No. 2 and the No. 1 ignition coil 3P 

connector terminal No. 3. 

Is there continuity? 

YES: Go to step 5.  

NO: Repair an open in the wire between ignition coil relay 4P socket terminal No. 2 and 
ignition coil 3P connector terminal No. 3. 

 

2004 Acura TSX 

2004 Engines Ignition System - TSX

  

 

Fig. 7: Checking For Continuity Between Ignition Coil Relay 4P Socket Terminal No. 2 And 
The No. 1 Ignition Coil 3P Connector Terminal No. 3 

5. Check for continuity between ignition coil relay 4P socket terminal No. 3 and body ground. 

Is there continuity? 

YES: Repair a short in the wire between ignition coil relay 4P socket terminal No. 3 and 
ECM/PCM.  

NO: Repair an open in the wire between ignition coil relay 4P socket terminal No. 3 and 
ECM/PCM.  

 

2004 Acura TSX 

2004 Engines Ignition System - TSX

  

 

Fig. 8: Checking For Continuity Between Ignition Coil Relay 4P Socket Terminal No. 3 And 
Body Ground 

SPARK PLUG INSPECTION 

1. Inspect the electrodes and ceramic insulator. 

Burned or worn electrodes may be caused by:  

z

Advanced ignition timing  

z

Loose spark plug  

z

Plug heat range too hot  

 

2004 Acura TSX 

2004 Engines Ignition System - TSX

  

 

z

Insufficient cooling  

Fouled plug may be caused by:  

z

Retarded ignition timing  

z

Oil in combustion chamber  

z

Incorrect spark plug gap  

z

Plug heat range too cold  

z

Excessive idling/low speed running  

z

Clogged air cleaner element  

z

Deteriorated ignition coils  

 

2004 Acura TSX 

2004 Engines Ignition System - TSX