Acura TSX / Honda Accord CL. Manual - part 532

Fig. 49: Checking For Continuity Between Throttle Actuator Control Module 16P Connector 
Terminals No. 1 And No. 8 

Is there continuity? 

YES - Substitute a known-good throttle actuator control module (see THROTTLE ACTUATOR 
CONTROL MODULE REPLACEMENT ), then go to step 20 and recheck. If DTC P2176 is not 
indicated, replace the original throttle actuator control module (see THROTTLE ACTUATOR 
CONTROL MODULE REPLACEMENT ), then go to step 20. 

NO - Repair open in the wires between the throttle body and the throttle actuator control module (motor 
drive lines), then go to step 20. 

18. Turn the ignition switch OFF.  

19. Replace the throttle body (see THROTTLE BODY REMOVAL/INSTALLATION ).  

20. Turn the ignition switch ON (II).  

21. Reset the ECM/PCM with the HDS.  

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

23. Turn the ignition switch OFF.  

24. Turn the ignition switch ON (II), and wait 10 seconds. 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE Electronic Throttle Control System - TSX

  

 

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

Are any Temporary DTCs or DTCs indicated? 

YES - If DTC P2176 is indicated, check for poor connections or loose terminals at the throttle body and 
the throttle actuator control module, then clean the throttle body (see THROTTLE BODY 
CLEANING ), and go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated 
DTC troubleshooting. 

NO - Troubleshooting is complete. 

DTC P2552: THROTTLE ACTUATOR CONTROL MODULE RELAY MALFUNCTION 

1. Turn the ignition switch ON (II).  

2. Clear the DTC with the HDS.  

3. Do the ETCS TEST in the INSPECTION MENU with the HDS. 

Is the RELAY Circuit OK? 

YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the 
throttle actuator control module relay, the throttle actuator control module, and at the ECM/PCM. 

NO - Go to step 4. 

4. Turn the ignition switch OFF.  

5. Jump the SCS line with the HDS.  

6. Remove the throttle actuator control module relay (A). 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE Electronic Throttle Control System - TSX

  

 

Fig. 50: Removing The Throttle Actuator Control Module Relay 

7. Disconnect ECM/PCM connector D (17P).  

8. Check for continuity between ECM/PCM connector terminal D15 and body ground. 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE Electronic Throttle Control System - TSX

  

 

Fig. 51: Checking For Continuity Between ECM/PCM Connector Terminal D15 And Body Ground

Is there continuity? 

YES - Repair short in the wire between the throttle actuator control module relay and ECM/PCM (D15), 
then go to step 10. 

NO - Go to step 9. 

9. Test the throttle actuator control module relay (see RELAYS ). 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE Electronic Throttle Control System - TSX