DESCRIPTION
The air by-pass valve assembly is installed in the air outlet duct. It opens and closes in response to drive commands from the ECM. During normal boosting, the air by-pass valve assembly is closed, and when the throttle valve is closed while the boost pressure is applied, the air by-pass valve assembly opens and the excess pressure between the turbocharger and throttle valve is released to prevent the surge phenomenon*.
*: This phenomenon is when the intake air flow reverses. As a result, an abnormal noise is easily generated during deceleration.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Note |
---|---|---|---|---|---|
P003312 | Turbocharger / Supercharger Bypass Valve "A" Control Circuit Short to Battery | Short circuit in air by-pass valve assembly circuit and power supply circuit (1 trip detection logic). |
| - | SAE: P0035 |
MONITOR DESCRIPTION
The ECM monitors the output voltage while the air by-pass valve assembly is operating.
The air by-pass valve assembly turns on and off according to ON/OFF 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 assembly circuit and stores a DTC.
CONFIRMATION DRIVING PATTERN
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
GTS Display | Description |
---|---|
NORMAL |
|
ABNORMAL |
|
INCOMPLETE |
|
HINT:
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
HINT:
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
1. | PERFORM ACTIVE TEST USING GTS (ACTIVATE THE AIR BYPASS VALVE) |
(a) Enter the following menus.
Powertrain > Engine > Active Test Active Test Display |
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Activate the Air Bypass Valve |
Data List Display |
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Air Bypass Valve Control |
(b) 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 |
|
OK | CHECK FOR INTERMITTENT PROBLEMS |
|
2. | INSPECT TURBOCHARGER SUB-ASSEMBLY |
Click here
NG | REPLACE TURBOCHARGER SUB-ASSEMBLY (AIR BY-PASS VALVE MALFUNCTION) |
|
3. | CHECK HARNESS AND CONNECTOR (AIR BY-PASS VALVE - ECM) |
(a) Disconnect the air by-pass valve connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
C53-2 (ABV) or C62-67 (ABV) - Other terminals | Always | 10 kΩ or higher |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. | CHECK WHETHER DTC OUTPUT RECURS (DTC P003312) |
(a) Clear the DTCs.
Powertrain > Engine > Clear DTCs(b) Turn the ignition switch off and wait for at least 30 seconds.
(c) Start the engine and warm it up.
(d) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
(e) Enter the following menus.
Powertrain > Engine > Utility Tester Display |
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All Readiness |
(f) Input the DTC: P003312.
(g) Check the DTC judgment result.
Result | Proceed to |
---|---|
NORMAL (DTCs are not output) | A |
ABNORMAL (P003312 is output) | B |
A | CHECK FOR INTERMITTENT PROBLEMS |
B | REPLACE ECM |
Automatic transaxle: Shift the selector lever to the P position and set the parking brake.
Press the push button start to turn off the engine. The ignition position is off.