DTC P0123: TP Sensor A Circuit High Voltage Honda Fit GE

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review GENERAL TROUBLESHOOTING INFORMATION . Information marked with an asterisk (*1) applies to '09-10 models and '11-12 models (M/T). Information marked with an asterisk (*2) applies to '11-12 models (A/T).

Scheme 269

Scheme 270

Scheme 271

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Check TP SENSOR A in the DATA LIST with the HDS. Is there about 4.8 V or more? YES: Go to step 4 . NO: Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body and the ECM/PCM.
4. Check for Pending or Confirmed DTCs with the HDS. Are DTC P0123 and P0223 indicated at the same time? YES: Go to step 13 . NO: Go to step 5 .
5. Turn the ignition switch to LOCK (0).
6. Disconnect the throttle body 6P connector.
7. Turn the ignition switch to ON (II).
8. Measure the voltage between throttle body 6P connector terminal No. 1 and body ground. Is there about 5 V? YES: Go to step 18 . NO: Go to step 9 .
9. Turn the ignition switch to LOCK (0).
10. Jump the SCS line with the HDS.
11. Disconnect ECM/PCM connector C (49P).
12. Check for continuity between ECM/PCM connector terminal C20 and throttle body 6P connector terminal No. 1. Is there continuity? YES: Go to step 25 . NO: Repair open in the wire between the throttle body and the ECM/PCM (C20), then go to step 20 .
13. Turn the ignition switch to LOCK (0).
14. Disconnect the throttle body 6P connector.
15. Jump the SCS line with the HDS.
16. Disconnect ECM/PCM connector C (49P).
17. Check for continuity between ECM/PCM connector terminal C43 and throttle body 6P connector terminal No. 4. Is there continuity? YES: Go to step 25 . NO: Repair open in the wire between the throttle body and the ECM/PCM (C43), then go to step 20 .
18. Turn the ignition switch to LOCK (0).
19. Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(ref-320437-S21155820802009071400000) ).
20. Reconnect all connectors.
21. Turn the ignition switch to ON (II).
22. Reset the ECM/PCM with the HDS.
23. Do «ECM/PCM IDLE LEARN PROCEDURE»(ref-320447-S03803966382009071400000) .
24. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0123 indicated? YES: Check for poor connections or loose terminals at the throttle body and the ECM/PCM, then go to step 1 . NO: Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
25. Reconnect all connectors.
26. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-320426-S22945234462009071400000) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-320425-S18610926012009071400000) ).
27. Check for Pending or Confirmed DTCs with the HDS. Is DTC P0123 indicated? YES: Check for poor connections or loose terminals at TP sensor A and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-320425-S18610926012009071400000) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO: If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(ref-320426-S21651098282009071400000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.