DTC P0039

DTC Detecting Condition and Trouble Area

DTC detecting condition	Trouble area
P0039: Turbocharger / Supercharger Bypass Valve “A” Control Circuit Range / Performance Boost pressure fluctuation is more than specified value during fuel cut. (1 D/C detection logic)	•ABV-VSV and/or its circuit •Air intake system •ECM

Circuit Diagram

[A]:	ECM connector (View: [a])	B1:	ABV-VSV drive circuit	2.	To main relay
A1:	ABV-VSV power supply circuit	1.	ABV-VSV	3.	ECM

DTC Confirmation Procedure

WARNING:

If you do not select a suitable route and take proper precautions when performing a road test, an accident can occur.

•Select a level road with no traffic to minimize the risk of accident.
•Perform the test extremely carefully.
•Perform the road test with 2 persons, a driver and a tester.

NOTE:

Check that the following DTCs are not detected in this “DTC Confirmation Procedure”.

•Boost pressure sensor (P0237 and P0238)

1)Warm up engine to normal operating temperature.

2)Accelerate vehicle under the following conditions for 10 sec.

•Shift position: 6th gear (M/T model) or D range (A/T model)
•Accelerator pedal: Depressed by a half of completely depressed position
•Engine speed: 3,000 rpm or more

3)Release accelerator pedal, and keep vehicle coasting for 10 sec. in engine braking condition. (Fuel cut)

DTC Troubleshooting

Step	Action	Yes	No
1	Was “Engine and Emission Control System Check” performed?	Go to Step 2.	Go to Engine and Emission Control System Check:K14C.
2	DTC check Is there any DTC(s) other than P0039?	Go to troubleshooting for applicable DTC.	Go to Step 3.
3	Air intake system check 1)Check air intake system for clogging or leakage. Is check result OK?	Go to Step 4.	Repair or replace defective part.
4	ABV-VSV circuit check 1)Check “A1” and “A2” circuits according to Step 2 – 3 under DTC P0033 / P0034 / P0035:K14C. Is check result OK?	Go to Step 5.	Repair or replace defective wire harness.
5	ABV-VSV check 1)Check ABV-VSV. Is check result OK?	Replace ECM and recheck DTC.	Replace ABV-VSV.