Go to step 9.

Is the resistance felt?
Compare the intake camshaft with the exhaust camshaft.
Is there any scratch or damage on the surface of the cam
journal?

9

Check the oil line
between the oil pump
and the sprocket.
Replace the oil filter on
the cam carrier. (Don’t
reuse)

Refer to the applicable section of Service Manual to remove
cam carrier.
Is there any contamination or clog visually in the cam carrier
or cylinder head oil line?
Is there any contamination or clog visually in the oil line
between the sprocket and the camshaft?
(Remove the sprocket from the camshaft.)
Is there any contamination or clog visually in the sprocket oil
line?
Is there any contamination or clog visually in the camshaft oil
line?

In case of there
is problem, repair
the wrong part
and replace cam
sprocket with new
one.
*Don’t apply too
much THREE BOND
when reassembling.
Refer to the
applicable section
of Service Manual
and apply correct
type of THREE
BOND with proper
quantity.

*Don’t apply too
much THREE BOND
when reassembling.
Refer to the
applicable section
of Service Manual
and apply correct
type of THREE
BOND with proper
quantity.

*Please do not
push in oil filter
excessively.
The upper end of
the filter should be
flush with the cam
carrier.

*Please do not
push in oil filter
excessively.
The upper end of
the filter should be
flush with the cam
carrier.

Go to step 10.

Go to step 10.

Continued...
Bulletin Number: 08-163-16; Date: 08/12/16

Page 4

Step
10 Check the oil strainer.

11 Check if the car is fixed.
1) Clear the memory by
using SSM.
2) Perform the drive
cycle. (Refer to the
Chapter 5)
3) Read the “AVCS
diagnostic value” by
using SSM. Please refer
to Chapter 6 to read out
MODE$06.

Check
Is there any debris or contamination in the oil strainer on the
oil pan?

Diagnostic value of applicable AVCS ≧ 1000?

If the value is less than 1000, is the value definitely greater
than the other AVCS value?

YES

NO

In case of there is
problem, remove
the debris and
clean it.
Change the engine
oil. Idle the engine
for 5 minutes.
Change the engine
oil and the filter.

Change the engine
oil. Idle the engine
for 5 minutes.
Change the engine
oil and the filter.

*Don’t apply too
much THREE BOND
when reassembling.
Refer to the
applicable section
of Service Manual
and apply correct
type of THREE
BOND with proper
quantity.

*Don’t apply too
much THREE BOND
when reassembling.
Refer to the
applicable section
of Service Manual
and apply correct
type of THREE
BOND with proper
quantity.

Go to step 11.

Go to step 11.

Replace ECU with
new one.

END

END

If the value is 0, the diagnosis process has not yet completed.
Continue to perform a drive cycle without stopping engine.
* The diagnostic value is updated repeatedly, therefore please
watch while test driving.

(2)-1. P0016 General
Troubleshooting for P0016, 17, 18 or 19 - No.1
General: Models for SSM “Data Monitor” showing “VVT Initial Position Learning Value”
Displayed “VVT Adv. Ang. Amount” at the standard angle is “0 deg.”.

Step

Check

LEGACY / OUTBACK 2.5L: 13MY and after
IMPREZA / XV: 14MY and after
FORESTER 2.5L NA: 14MY and after
FORESTER 2.0L Turbo: 16MY and after
WRX: 15MY and after
YES

NO

1

Check the DTC

Is there any DTC except P0016, 17, 18 or 19?

Go to the
concerned DTC
troubleshooting

2

Check the engine oil
condition.

Does the oil level gauge show out of range?
Is the oil excessively dirty?
Is the oil clotted due to use of additives?
Is undesignated viscosity oil used?

Correct the oil level. Go to step 3.
Replace the engine
oil and filter.

Save the FFD.
Go to step 2.

Go to step 3.

Continued...
Bulletin Number: 08-163-16; Date: 08/12/16

Page 5

Step
3

4

YES

Check the chain timing. Does “VVT Adv. Ang. Amount” have more than ± 10deg
difference from the reference value (0 deg.)?
1) Clear the memory
by using SSM.
- Connect the connector after the check.
2) Disconnect the
- Record the “VVT Adv. Ang. Amount” because the step below
oil control valve
uses the value.
connector.
DTC comes on but
*Detailed process
there is no problem for 1. Clear the memory by using SSM.
this check process.
2. Disconnect the applicable AVCS connector which had the
3) Start the engine and DTC.
check the “VVT Adv.
3. Turn IG on and start monitor the AVCS advance timing value
Ang. Amount” at idle
which is the item “VVT Adv. Ang. Amount” in the SSM.
within 10 sec. from
4. Start engine and read out “VVT Adv. Ang. Amount” within
starting the engine by
10 sec.
using SSM.
(The value changes to “0” after 10 sec.)
(Refer to 4.1 in Chapter 5. Stop the engine.
4)

Correct the chain
timing.

Check if the car is
fixed.

Go to step 5.

1) Replace the oil
control valve with
brand new one.
2) Clear the memory
by using SSM.
3) Perform the drive
cycle. (Refer to the 6th
chapter)
4) Read the “AVCS
diagnostic value” by
using SSM. Please
refer to Chapter 6 to
read out MODE$06.
5

Check

Check the harness.

Diagnostic value of applicable AVCS ≧ 1000?

Change the engine
oil. Idle the engine
for 5 minutes.
Change the engine
oil and the filter.

If the value is 0, the diagnosis process has not yet completed.
Continue to perform a drive cycle without stopping the engine.

Go to step 12.

* The diagnostic value is updated repeatedly, therefore please
watch it while test driving

- Is there any damage on the connector pin of oil control valve,
cam angle sensor, crank angle sensor or ECU?

Go to step 4.

Go to step 12.

If the value is less than 1000, is the value definitely greater
than the other AVCS value?

Is there a poor contact among the oil control valve, cam angle
sensor, crank angle sensor and ECU?

NO

Repair the problem. Go to step 7.
Go to step 6.

- Are following resistances more than 1Ω?
Between the oil control valve and the ECU.
Between the cam angle sensor and the ECU.
Between the crank angle sensor and the ECU.
*Connector Numbers are found in Chapter 8.
6

Check if the car is
fixed.
1) Clear the memory
by using SSM.
2) Perform the drive
cycle. (Refer to the 6th
chapter)
3) Read the “AVCS
diagnostic value” by
using SSM. Please
refer to Chapter 6 to
read out MODE$06.

Diagnostic value of applicable AVCS ≧ 1000?

Go to step 7.

Go to step 12.

If the value is less than 1000, is the value definitely greater
than the other AVCS value?
If the value is 0, the diagnosis process has not yet completed.
Continue to perform a drive cycle without stopping the engine.
* The diagnostic value is updated repeatedly, therefore please
watch it while test driving.

Continued...
Bulletin Number: 08-163-16; Date: 08/12/16

Page 6

Step
7

8

Check

Check engine oil
pressure.

The engine oil pressure is lower than standard?

Check the oil passage
in the chain cover.

Is there any abnormality on the O-ring for suction port and
discharge port of the oil pump?
Is there any abnormality on the O-rings for oil passage to both
sides of cylinder heads?

Is there any trace mark of contamination on the oil pump?
Check the camshaft
condition.

Go to step 8.

NO
Go to step 8.

Replace the chain
cover with new one
after the inspection
is completed.

Is there any damage or contamination with the oil control
valve?

9

YES

Remove the timing chain and rotate camshafts.
Compare four camshaft of rotating friction.
Is there particular friction in the camshaft which had DTC?
Is there any scratch or damage on the surface of the cam
journal?

Repair the problem. Go to step 9.
Go to step 9.
In case of
contamination,
replace the chain
cover with new one
after the inspection
is completed.
Replace Cam carrier Go to step 10.
and camshaft with
new one.
Go to step 10.

Is the resistance felt?
Compare the intake camshaft with the exhaust camshaft.
Is there any scratch or damage on the surface of the cam
journal?
10

Check the oil line
between the oil pump
and the sprocket.
Replace the oil filter on
the cam carrier. (Don’t
reuse)

Refer to the applicable section of Service Manual to remove
cam carrier.
Is there any contamination or clog visually in the cam carrier
or cylinder head oil line?
Is there any contamination or clog visually in the oil line
between the sprocket and the camshaft?
Remove the sprocket from the camshaft.
Is there any contamination or clog visually in the sprocket oil
line?
Is there any contamination or clog visually in the camshaft oil
line?

In case of there
is problem, repair
the wrong part
and replace cam
sprocket with new
one.
*Don’t apply too
much THREE BOND
when reassembling.
Refer to the
applicable section
of Service Manual
and apply correct
type of THREE
BOND with proper
quantity.

*Don’t apply too
much THREE BOND
when reassembling.
Refer to the
applicable section
of Service Manual
and apply correct
type of THREE
BOND with proper
quantity.

*Please do not
push in oil filter
excessively.
The upper end of
the filter should be
flush with the cam
carrier.

*Please do not
push in oil filter
excessively.
The upper end of
the filter should be
flush with the cam
carrier.

Go to step 11.

Go to step 11.

Continued...
Bulletin Number: 08-163-16; Date: 08/12/16

Page 7

Step
11

Check the oil strainer.

Check
Is there any debris or contamination in the oil strainer on the
oil pan?

YES
In case of there is
problem, remove
the debris and
clean it.
Change the engine
oil. Idle the engine
for 5 minutes.
Change the engine
oil and the filter.

NO
Change the engine
oil. Idle the engine
for 5 minutes.
Change the engine
oil and the filter.

*Don’t apply too
much THREE BOND
when reassembling.
Refer to the
*Don’t apply too
applicable section
much THREE BOND of Service Manual
when reassembling. and apply correct
Refer to the
type of THREE
applicable section
BOND with proper
of Service Manual
quantity.
and apply correct
type of THREE
Go to step 12.
BOND with proper
quantity.
Go to step 12.
12

Check the learning
value.
1) Clear the memory
by using SSM.
2) Turn IG on.
3) Read the “VVT Initial
Position Learning
Value” by using SSM
“Data Monitor”.
(Refer to 4.1 in
Chapter 4)

Is the following value out of normal range?
“VVT Initial Position Learning Value” + “VVT Adv. Ang.
Amount”
*”VVT Adv. Ang. Amount” is read out in the step 3 of this
troubleshooting.

Replace the ECU
with new one.

END

Drive the test
driving cycle.
END

*Refer to Chapter 7 which shows a normal range of the
learning value.

(2)-2. P0016 for 27deg.
Troubleshooting for P0016, 17, 18 or 19 - No.2
27 deg.: Models for SSM “Data Monitor” showing “VVT Initial Position Learning Value”
Displayed “VVT Adv. Ang. Amount” at the standard angle is “27deg”.
Step

Check