P003312

DTC Code	DTC Name
P003312	Turbocharger / Supercharger Bypass Valve "A" Control Circuit Short to Battery

DESCRIPTION

The air by-pass valve is installed to the turbocharger sub-assembly. It opens and closes in response to drive commands from the ECM. If the air by-pass valve closes during normal boosting and the throttle valve closes while boost pressure is being applied, the air by-pass valve will open and the excess pressure between the turbocharger and the throttle valve will be released.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P003312	Turbocharger / Supercharger Bypass Valve "A" Control Circuit Short to Battery	Short to +B in air by-pass valve circuit (1 trip detection logic).	Short in air by-pass valve circuit Air by-pass valve (turbocharger sub-assembly) ECM	Does not come on	DTC stored	SAE Code: P0035

MONITOR DESCRIPTION

The ECM monitors the output voltage while the air by-pass valve is operating.

The air by-pass valve turns on and off according to switching of a transistor inside the ECM.

If a continuous mismatch occurs between the ECM transistor state and the output voltage, the ECM determines there is a malfunction in the air by-pass valve circuit and stores this DTC.

CONFIRMATION DRIVING PATTERN

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON and turn the GTS on.
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [A].
Accelerate to 50 km/h (31 mph) or more with the accelerator pedal fully depressed [B].

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Quickly release the accelerator pedal from the fully depressed position [C].
Enter the following menus: Powertrain / Engine / Trouble Codes [D].
Read the pending DTCs.
Tech Tips
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P003312.

Check the DTC judgment result.

GTS Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

Tech Tips

If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE or N/A, perform steps [B] through [D] again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following procedure.

Tech Tips

Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

PERFORM ACTIVE TEST USING GTS (ACTIVATE THE AIR BYPASS VALVE)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Active Test / Activate the Air Bypass Valve / Data List / All Data / Air Bypass Valve Control.

Powertrain > Engine > Active Test

Active Test Display

Activate the Air Bypass Valve

Data List Display

Air Bypass Valve Control

Active Test Display
Activate the Air Bypass Valve

Data List Display
Air Bypass Valve Control

According to the display on the GTS, perform the Active Test and check the operation and operation sound of the air by-pass valve.

OK

Active Test	Standard
ON	ON is displayed for Data List item "Air Bypass Valve Control" Air by-pass valve operates (operation sound is normal)

Result

Proceed to
OK
NG

OK

CHECK FOR INTERMITTENT PROBLEMS Click here

NG

INSPECT AIR BY-PASS VALVE

Inspect the air by-pass valve.

Click here

Result

Proceed to
OK
NG

NG

REPLACE TURBOCHARGER SUB-ASSEMBLY Click here

OK

CHECK HARNESS AND CONNECTOR (AIR BY-PASS VALVE - ECM)

Disconnect the air by-pass valve connector.
Disconnect the ECM connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
B202-2 or B208-67 (ABV) - Other terminals	Always	10 kΩ or higher

Result

Proceed to
OK
NG

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

INSPECT DIODE

Disconnect the diode connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
A185-1 (positiove (+) tester probe) - A185-2 (negative (-) tester probe)	Always	Below 1 Ω
A185-2 (positiove (+) tester probe) - A185-1 (negative (-) tester probe)	Always	10 kΩ or higher

Result

Proceed to
OK
NG

NG

REPLACE DIODE

OK

CHECK WHETHER DTC OUTPUT RECURS (DTC P003312)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine > Clear DTCs
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON.
Turn the GTS on.
Start the engine and warm it up.
Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility

Tester Display

All Readiness
Input the DTC: P003312.

Tester Display
All Readiness

Check the DTC judgment result.

Result

Proceed to

NORMAL

(DTCs are not output)

A

ABNORMAL

(DTC P003312 is output)

B

A

CHECK FOR INTERMITTENT PROBLEMS Click here

B

REPLACE ECM Click here

SFI SYSTEM, Diagnostic DTC:P003312