Acura TSX / Honda Accord CL. Manual - part 533

Is the relay OK? 

YES - Go to step 17. 

NO - Replace the throttle actuator control module relay, then go to step 10. 

10. Reconnect ECM/PCM connector D (17P).  

11. Turn the ignition switch ON (II).  

12. Reset the ECM/PCM with the HDS.  

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

14. Turn the ignition switch OFF.  

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

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

Are any Temporary DTCs or DTCs indicated? 

YES - If DTC P2552 is indicated, check for poor connections or loose terminals at the throttle actuator 
control module relay, the throttle actuator control module, 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. 

17. 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 ).  

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

Are any Temporary DTCs or DTCs indicated? 

YES - If DTC P2552 is indicated, check for poor connections or loose terminals at the throttle actuator 
control module relay, the throttle actuator control module, 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 U0107: LOST COMMUNICATION WITH THROTTLE ACTUATOR CONTROL MODULE 

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. 

Is DTC U0107 indicated? 

YES - Check for poor connections or loose terminals at the throttle body, the throttle actuator control, 
module and the ECM/PCM, then go to step 50 . If the connections are OK, go to step 6. 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE Electronic Throttle Control System - TSX

  

 

NO - Go to step 4. 

4. Start the engine.  

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

Is DTC U0107 indicated? 

YES - Go to step 46 . 

NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the 
throttle body, the throttle actuator control module relay, the throttle actuator control module, and the 
ECM/PCM. 

6. Clear the DTC with the HDS.  

7. Turn the ignition switch OFF.  

8. Disconnect the intake air duct from the throttle body.  

9. Press the accelerator pedal to the floor.  

10. Turn the ignition switch ON (II).  

11. Check the throttle valve operation. 

Does it open after the throttle valve closes? 

YES - Go to step 12. 

NO - Go to step 13. 

12. Check the throttle valve again. 

Does the throttle valve open fully? 

YES - Go to step 40 . 

NO - Go to step 34 . 

13. Turn the ignition switch OFF.  

14. Disconnect the throttle actuator control module 16P connector.  

15. Check for continuity between throttle actuator control module 16P connector terminal No. 7 and body 

ground. 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE Electronic Throttle Control System - TSX

  

 

Fig. 52: Checking For Continuity Between Throttle Actuator Control Module 16P Connector 
Terminal No. 7 And Body Ground 

Is there continuity? 

YES - Go to step 16. 

NO - Repair open in the wire between the throttle body, the throttle actuator control module, and G101, 
then go to step 50 . 

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

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE Electronic Throttle Control System - TSX

  

 

Fig. 53: Removing The Throttle Actuator Control Module Relay 

17. Measure voltage between throttle actuator control module relay terminal No. 2 and body ground. 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE Electronic Throttle Control System - TSX