U0107
DTC U0107: Lost Communication with Throttle Actuator Control Module1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Check for Temporary DTCs or DTCs with the HDS.
Is DTC U0107 indicated?
YES - Go to step 4.
NO - Go to step 9.
4. Turn the ignition switch OFF within 2 seconds after doing the DTC CLEAR with the HDS.
NOTE: If the DTC is stored, clear the DTC again.
5. Disconnect the intake air duct from the throttle body.
6. Press and hold the accelerator pedal fully down.
7. Turn the ignition switch ON (II).
8. Check the throttle valve operation.
Does the throttle valve close fully, then open fully?
YES - Go to step 15.
NO - If the throttle valve does not close fully after the ignition is turned ON (II), go to step 21. If the throttle valve closes fully but does not open fully, go to step 36.
9. Start the engine.
10. Check for Temporary DTCs or DTCs with the HDS.
Is DTC U0107 indicated?
YES - Go to step 11.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the throttle actuator control module, the throttle actuator control module relay, the ETC fuse (15 A) at the under-hood subfuse box, and the PCM.
11. Turn the ignition switch OFF.
12. Jump the SCS line with the HDS.
13. Disconnect PCM connector A (73P).
14. Check for continuity between body ground and PCM connector A (73P) terminals A39 and A40.
Is there continuity?
YES - Go to step 52.
NO - Repair open in the wire between the PCM (A39, A40) and G101, then go to step 49.
15. Turn the ignition switch OFF.
16. Jump the SCS line with the HDS.
17. Disconnect PCM connector A (73P).
18. Disconnect the throttle actuator control module 16P connector.
19. Check for continuity between throttle actuator control module 16P connector No.4 terminal and body ground.
Is there continuity?
YES - Repair short in the wire between the PCM and the throttle actuator control module, then go to step 49.
NO - Go to step 20.
20. Check for continuity between PCM connector terminal A1 and throttle actuator control module 16P connector terminal No.4.
Is there continuity?
YES - Go to step 47.
NO - Repair open in the wire between the PCM (A1) and throttle actuator control module, then go to step 48.
21. Turn the ignition switch OFF.
22. Disconnect the throttle actuator control module 16P connector.
23. Check for continuity between body ground and throttle actuator control module connector terminals No.2 and No.10.
Is there continuity?
YES - Go to step 24.
NO - Repair open in the wire between the throttle actuator control module and G101, then go to step 49.
24. Check the TAC RELAY in the DATA LIST with the HDS.
Is it ON?
YES - Go to step 51.
NO - Go to step 25.
25. Turn the ignition switch OFF.
26. Turn the ignition switch ON (II).
27. Measure voltage between throttle actuator control module 16P connector terminal No.5 and body ground.
Is there about 3 V or more?
YES - Go to step 28.
NO - Go to step 41.
28. Measure voltage between throttle actuator control module 16P connector terminal No.1 terminal and body ground.
Is there battery voltage?
YES - Go to step 47.
NO - Go to step 29.
29. Measure voltage between the throttle actuator control relay 4P connector terminal No.1 and body ground.
Is there battery voltage?
YES - Go to step 30.
NO - Check the No.7 ETC (15 A) fuse in the under-hood subfuse box. If the fuse is OK, check for an open in the wire between the under-hood subfuse box and throttle actuator control relay, then go to step 49.
30. Turn the ignition switch OFF.
31. Remove the throttle actuator control relay.
32. Disconnect the throttle actuator control module 16P connector.
33. Connect the throttle actuator control relay 4P connector terminal No.2 to body ground with a jumper wire.
34. Check for continuity between throttle actuator control module 16P connector terminal No.1 and body ground.
Is there continuity?
YES - Replace the throttle actuator control relay, then go to step 48.
NO - Repair open in the wire between the throttle actuator control relay and throttle actuator control module, then go to step 48.
35. Turn the ignition switch OFF.
36. Jump the SCS line with the HDS.
37. Disconnect PCM connector A (73P).
38. Disconnect the throttle actuator control module 16P connector.
39. Check for continuity between throttle actuator control module 16P connector terminal No.13 and body ground.
Is there continuity?
YES - Repair short in the wire between the PCM and throttle actuator control module, then go to step 48.
NO - Go to step 40.
40. Check for continuity between PCM connector terminal A2 and throttle actuator control module 16P connector terminal No.13.
Is there continuity?
YES - Go to step 47.
NO - Repair open in the wire between the PCM (A2) and throttle actuator control module, then go to step 48.
41. Turn the ignition switch OFF.
42. Jump the SCS line with the HDS.
43. Disconnect PCM connector A (73P).
44. Disconnect the throttle actuator control module 16P connector.
45. Check for continuity between throttle actuator control module 16P connector terminal No.6 and body ground.
Is there continuity?
YES - Repair short in the wire between the PCM (A29) and throttle actuator control module, then go to step 48.
NO - Go to step 46.
46. Check for continuity between PCM connector terminal A29 and throttle actuator control module 16P connector terminal No.6.
Is there continuity?
YES - Go to step 51.
NO - Repair open in the wire between the PCM (A29) and throttle actuator control module, then go to step 48.
47. Replace the throttle body assembly.
48. Turn the ignition switch ON (II).
49. Clear the DTC with the HDS.
50. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - Go to step 51.
NO - Troubleshooting is complete.
51. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
52. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC U0107 is indicated, check for poor connections or loose terminals at the throttle actuator control module and the PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM.