Acura TSX / Honda Accord CL. Manual - part 572

1. Start the engine.  

2. Turn the blower switch on.  

3. Turn the A/C switch on.  

4. Check the A/C CLUTCH in the DATA LIST with the HDS. 

Is it ON? 

YES -Go to step 5. 

NO -Go to the A/C pressure switch circuit test (see A/C PRESSURE SWITCH AND THERMAL 
PROTECTOR CIRCUIT TEST ). 

5. Check the A/C system. 

Does the A/C system operate? 

YES -The air conditioning system circuit is OK. 

NO -Go to step 6. 

6. Turn the ignition switch OFF.  

7. Turn the ignition switch ON (II).  

8. Activate the A/C CLUTCH in the INSPECTION MENU with the HDS. 

Is there a clicking noise from the A/C compressor clutch? 

YES -Do the A/C system troubleshooting. 

NO -Go to step 9. 

9. Momentarily connect under-hood fuse/relay box 16P connector terminal No. 15 to body ground with a 

jumper wire several times. 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE Idle Control System - TSX

  

 

Fig. 2: Momentarily Connecting Under-Hood Fuse/Relay Box 16P Connector Terminal No. 15 To 
Body Ground With A Jumper Wire 

Is there clicking noise from the A/C compressor clutch? 

YES -Repair open in the wire between the ECM/PCM (E18) and the A/C clutch relay. 

NO -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. 

ALTERNATOR FR SIGNAL CIRCUIT TROUBLESHOOTING 

1. Start the engine, and let it idle.  

2. Monitor the ALTERNATOR in the DATA LIST with the HDS.  

3. Check if the indicated percentage varies when the headlight switch is on. 

Does the percentage vary? 

YES -The alternator signal circuit is OK.

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE Idle Control System - TSX

  

 

NO -Go to step 4. 

4. Turn the headlight switch and ignition switch OFF.  

5. Disconnect the alternator 4P connector.  

6. Turn the ignition switch ON (II).  

7. Measure voltage between ECM/PCM connector terminals A9 and B13. 

Fig. 3: Measuring Voltage Between ECM/PCM Connector Terminals A9 And B13 

Is there about 5 V? 

YES -Go to step 8. 

NO -Go to step 13. 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE Idle Control System - TSX

  

 

8. Turn the ignition switch OFF.  

9. Jump the SCS line with the HDS.  

10. Disconnect ECM/PCM connector B (24P).  

11. Connect alternator 4P connector terminal No. 4 to body ground with a jumper wire. 

Fig. 4: Connecting Alternator 4P Connector Terminal No. 4 To Body Ground With A Jumper Wire

12. Check for continuity between body ground and ECM/PCM connector terminal B13. 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE Idle Control System - TSX