Acura TSX / Honda Accord CL. Manual — part 612

Fig. 81: Removing PGM-FI Main Relay 1 (FI MAIN) From The Under-Dash Fuse/Relay Box

18. Measure voltage between body ground and ECM/PCM connector terminals A3 and A2 individually.

Is there battery voltage?

YES: Repair short to power in the wire between the ECM/PCM (A2, A3) and PGM-FI main
relay 1, then go to step 20 .

NO: Go to step 19.

2004 Acura TSX

2004 ENGINE PERFORMANCE PGM-FI System - TSX

Fig. 82: Measuring Voltage Between Body Ground And ECM/PCM Connector Terminals A3
& A2

19. Replace PGM-FI main relay 1 (A).

2004 Acura TSX

2004 ENGINE PERFORMANCE PGM-FI System - TSX

Fig. 83: Replacing PGM-FI Main Relay 1

20. Turn the ignition switch ON (II).

21. Reset the ECM/PCM with the HDS.

22. Turn the ignition switch OFF.

23. Wait 10 seconds.

24. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).

25. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES: If DTC P0563 is indicated, check for poor connections or loose terminals at PGM-FI
main relay 1 and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs
are indicated, go to the indicated DTC troubleshooting.

NO: Troubleshooting is complete.

26. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see

HOW TO SUBSTITUTE THE ECM/PCM ).

2004 Acura TSX

2004 ENGINE PERFORMANCE PGM-FI System - TSX

27. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES: If DTC P0563 is indicated, check for poor connections or loose terminals at PGM-FI
main relay 1 and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs
are indicated, go to the indicated DTC troubleshooting.

NO: If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was
substituted, replace the original ECM/PCM (see HOW TO REMOVE THE ECM/PCM
FOR TESTING ).

DTC P0603: ECM/PCM INTERNAL CONTROL MODULE KEEP ALIVE MEMORY (KAM) ERROR

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES: Update the ECM/PCM if it does not have the latest software, or substitute a known-
good ECM/PCM, then recheck (see HOW TO SUBSTITUTE THE ECM/PCM ). If the
symptom/indication goes away with a known-good ECM/PCM, replace the original
ECM/PCM.

NO: Intermittent failure, system is OK at this time.

DTC P0606: ECM/PCM PROCESSOR MALFUNCTION

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. Turn the ignition switch OFF.

4. Turn the ignition switch ON (II).

5. Wait 40 seconds.

6. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.

Is DTC P0606 indicated?

YES: Update the ECM/PCM if it does not have the latest software, or substitute a known-
good ECM/PCM, then recheck (see HOW TO SUBSTITUTE THE ECM/PCM ). If the
symptom/indication goes away with a known-good ECM/PCM, replace the original
ECM/PCM.

NO: Intermittent failure, system is OK at this time.

DTC P0685: ECM/PCM POWER CONTROL CIRCUIT MALFUNCTION

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.

Are any Temporary DTCs or DTCs indicated?

2004 Acura TSX

2004 ENGINE PERFORMANCE PGM-FI System - TSX