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