DTC Advanced Diagnostics: P0034
DTC P0034:Turbocharger Bypass Control Solenoid Valve Circuit Low Voltage

General Description

The monitoring of the turbocharger bypass control solenoid valve is done by the powertrain control module (PCM). If the turbocharger bypass control solenoid valve output voltage is a specified value, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type
Execution
Continuous
Sequence
None
Duration
0.5 second or more
DTC Type
Two drive cycles, MIL on

Enable Conditions
Condition
Minimum
Maximum
Engine speed [Engine Speed]
80 rpm
–
12 volt battery voltage [Battery]
8 V
–
[ ]: HDS Parameter

Malfunction Threshold
The turbocharger bypass control solenoid valve output voltage is 2.74 V or less for at least 0.5 second when the turbocharger bypass control solenoid valve power stage is off.

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
Turbocharger bypass control solenoid valve ABV line short to ground
Turbocharger bypass control solenoid valve failure
PCM internal circuit failure

Confirmation Procedure
Operating Condition
1.
Start the engine.
2.
Drive the vehicle by accelerating until the turbocharger operates, and decelerate with the throttle valve fully closed.
Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.
With the HDS
Do the ABV TEST in the INSPECTION MENU with the HDS.

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.