DTC Troubleshooting: P0034
DTC P0034: Turbocharger Bypass Control Solenoid Valve Circuit Low Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
P0034 Turbocharger Bypass Control Solenoid Valve Circuit Low Voltage
    

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Do the ABV TEST in the INSPECTION MENU with the HDS.

  

?4.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P0034 Turbocharger Bypass Control Solenoid Valve Circuit Low Voltage
    

Is DTC P0034 indicated?

     
YES
     
     
     
Go to step 2.
     
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. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?
2.
Turbocharger bypass control solenoid valve internal circuit check:

Turbocharger bypass control solenoid valve internal circuit check
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Turbocharger bypass control solenoid valve 2P connector

?3.
At the solenoid valve side, measure the resistance between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Turbocharger bypass control solenoid valve 2P connector: disconnected
Test point 1
Turbocharger bypass control solenoid valve 2P connector No. 1 (solenoid valve side)
Test point 2
Turbocharger bypass control solenoid valve 2P connector No. 2 (solenoid valve side)


Is there about 30?34 ? at room temperature?

     
YES
     
     
     
The turbocharger bypass control solenoid valve OK. Go to step 3.
     
NO
     
     
     
3.
Fuse check:

Fuse check
?1.
Check the following fuse.
Fuse
No. B21 (10 A)
Location
Under-dash fuse/relay box

Is the fuse OK?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
Repair a short in the IG1 ACG/IG1(ABV) wire between the turbocharger bypass control solenoid valve and the No. B21 (10 A) fuse. Also replace the No. B21 (10 A) fuse.?
4.
Open wire check (IG1 ACG/IG1(ABV) line):

Open wire check (IG1 ACG/IG1(ABV) line)
?1.
Turn the vehicle to the ON mode.

?2.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
Turbocharger bypass control solenoid valve 2P connector: disconnected
Test point 1
Turbocharger bypass control solenoid valve 2P connector No. 2
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
Go to step 5.
     
NO
     
     
     
Repair an open in the IG1 ACG/IG1(ABV) wire between the turbocharger bypass control solenoid valve and the No. B21 (10 A) fuse in the under-dash fuse/relay box. If needed, replace the under-dash fuse/relay box.?
5.
Short wire check (ABV line):

Short wire check (ABV line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS, and wait more than 1 minute.


?3.
Disconnect the following connector.
PCM connector E (80P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Turbocharger bypass control solenoid valve 2P connector: disconnected
 
PCM connector E (80P): disconnected
Test point 1
Turbocharger bypass control solenoid valve 2P connector No. 1
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short in the ABV wire between the PCM (E79) and the turbocharger bypass control solenoid valve.?
     
NO
     
     
     
The ABV wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P0034 goes away and the PCM was substituted, replace the original PCM.?