DTC Troubleshooting
DTC Troubleshooting: P0034 (194)
DTC P0034:
Turbocharger Bypass Control Solenoid Valve Circuit Low Voltage
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information Initial Inspection and Diagnostic Overview.
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Select TURBOCHARGER BYPASS CONTROL SOLENOID VALVE ON in the INSPECTION MENU with the HDS.
4. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0034 indicated?
YES -
Go to step 5.
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the turbocharger bypass control solenoid valve and the PCM.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the turbocharger bypass control solenoid valve 2P connector.
7. At the solenoid side, measure the resistance between turbocharger bypass control solenoid valve 2P connector terminals No. 1 and No. 2.
Is there 30.0-34.0 Ohms at room temperature (about 68°F, 20°C)?
YES -
Go to step 8.
NO -
Go to step 16.
8. Check the No. 3 IG1 ACG (15 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?
YES -
Go to step 9.
NO -
Repair a short in the wire between the turbocharger bypass control solenoid valve and the fuse. Also replace the blown fuse, then go to step 17.
9. Turn the ignition switch to ON (II).
10. Measure the voltage between turbocharger bypass control solenoid valve 2P connector terminal No. 1 and body ground.
Is there battery voltage?
YES -
Go to step 11.
NO -
Repair an open in the wire between the turbocharger bypass control solenoid valve and No. 3 IG1 ACG (15 A) fuse, then go to step 17.
11. Turn the ignition switch to LOCK (0).
12. Jump the SCS line with the HDS.
13. Disconnect PCM connector C (44P).
14. Check for continuity between PCM connector terminal C25 and body ground.
Is there continuity?
YES -
Repair a short in the wire between the PCM (C25) and turbocharger bypass control solenoid valve, then go to step 17.
NO -
Go to step 15.
15. Check for continuity between PCM connector terminal C25 and turbocharger bypass control solenoid valve 2P connector terminal No. 2.
Is there continuity?
YES -
Go to step 24.
NO -
Repair an open in the wire between the PCM (C25) and turbocharger bypass control solenoid valve, then go to step 17.
16. Replace the turbocharger bypass control solenoid valve Service and Repair.
17. Reconnect all connectors.
18. Turn the ignition switch to ON (II).
19. Reset the PCM with the HDS.
20. Do the PCM idle learn procedure PCM Idle Learn Procedure.
21. Select TURBOCHARGER BYPASS CONTROL SOLENOID VALVE ON in the INSPECTION MENU with the HDS.
22. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0034 indicated?
YES -
Check for poor connections or loose terminals at the turbocharger bypass control solenoid valve and the PCM, then go to step 1.
NO -
Go to step 23.
23. Monitor the OBD STATUS for DTC P0034 in the DTCs MENU with the HDS.
Does the HDS indicate PASSED?
YES -
Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated in step 22, go to the indicated DTC's troubleshooting.
NO -
If the HDS indicates FAILED, check for poor connections or loose terminals at the turbocharger bypass control solenoid valve and the PCM, then go to step 1. If the HDS indicates NOT COMPLETED, go to step 21.
24. Reconnect all connectors.
25. Update the PCM if it does not have the latest software PCM Update, or substitute a known-good PCM.
26. Select TURBOCHARGER BYPASS CONTROL SOLENOID VALVE ON in the INSPECTION MENU with the HDS.
27. Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0034 indicated?
YES -
Check for poor connections or loose terminals at the turbocharger bypass control solenoid valve and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 26. If the PCM was substituted, go to step 1.
NO -
Go to step 28.
28. Monitor the OBD STATUS for DTC P0034 in the DTCs MENU with the HDS.
Does the HDS indicate PASSED?
YES -
If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM Service and Repair. If any other Pending or Confirmed DTCs were indicated in step 27, go to the indicated DTC's troubleshooting.
NO -
If the HDS indicates FAILED, check for poor connections or loose terminals at the turbocharger bypass control solenoid valve and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 26. If the PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, go to step 26.