7

Check engine oil
pressure.

The engine oil pressure is lower than standard?

Go to step 8.
Replace the chain
cover with new one
after the inspection
is completed.

8

Check the oil passage
in the chain cover.

Is there any abnormality on the O-ring for suction and
discharge port of the oil pump?

Repair the problem. Go to step 9.

Is there any abnormality on the O-rings for oil passage to both
sides of cylinder heads?
Is there any damage or contamination with the oil control
valve?
Is there any trace mark of contamination on the oil pump?
9

Check the camshaft
condition.

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?

Go to step 8.

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 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
*Don’t apply too
of Service Manual
much THREE BOND and apply correct
when reassembling. type of THREE
Refer to the
BOND with proper
applicable section
quantity.
of Service Manual
and apply correct
*Please do not
type of THREE
push in oil filter
BOND with proper
excessively.
quantity.
The upper end of
the filter should be
*Please do not
flush with the cam
push in oil filter
carrier.
excessively.
The upper end of
Go to step 11.
the filter should be
flush with the cam
carrier.
Go to step 11.

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

Page 13

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.

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

*Don’t apply too
Idle the engine for 5 much THREE BOND
minutes.
when reassembling.
Change the engine
oil and the filter.

Refer to the
applicable section
of Service Manual
*Don’t apply too
and apply correct
much THREE BOND type of THREE
when reassembling. BOND with proper
quantity.
Refer to the
applicable section
Go to step 12.
of Service Manual
and apply correct
type of THREE
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
“Work Support”.
(Refer to 4.2 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)-4. P0016 for No Learning Value
Troubleshooting for P0016, 17, 18 or 19 - No.4
No learning data: Models for SSM No showing “VVT Initial Position Learning Value”
Displayed “VVT Adv. Ang. Amount” at the standard angle is “0 deg.”.
Step

Check

IMPREZA: 12MY and 13MY
XV: 13MY
FORESTER 2.5L NA: 11MY, 12MY and
13MY
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.
Go to step 3.

Save the FFD.
Go to step 2.

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

Page 14

Step
3

Check the chain timing.
1) Clear the memory by
using SSM.
2) Disconnect the
oil control valve
connector.
DTC comes on but
there is no problem for
this check process.
3) Start the engine and
check the “VVT Adv.
Ang. Amount” at idle
within 10 sec. from
starting the engine by
using SSM.
(Refer to 4.1 in
Chapter 4)

4

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

5

Check the harness.

Check

YES

Does “VVT Adv. Ang. Amount” have more than ± 10 deg.
difference from the reference value (0 deg.)?

Correct the chain
timing.

- Connect the connector after the check.
- Record the “VVT Adv. Ang. Amount” because the step below
uses the value.

Go to step 12.

NO
Go to step 4.

*Detailed process
1. Clear the memory by using SSM.
2. Disconnect the applicable AVCS connector which had the
DTC.
3. Turn IG on and start monitor the AVCS advance timing value
which is the item “VVT Adv. Ang. Amount” in the SSM.
4. Start engine and read out “VVT Adv. Ang. Amount” within
10 sec.
(The value changes to “0” after 10 sec.)
5. Stop the engine.
Diagnostic value of applicable AVCS ≧ 1000?

Go to step 5.

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

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 a poor contact among the oil control valve, cam angle
sensor, crank angle sensor and ECU?
- Is there any damage on the connector pin of oil control valve,
cam angle sensor, crank angle sensor or ECU?
- Are following resistances more than 1Ω?

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

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

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 Chapter
5)
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 15

Step

Check

YES

NO

7

Check engine oil
pressure.

The engine oil pressure is lower than standard?

Go to step 8.
Replace the chain
cover with new one
after the inspection
is completed.

8

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?

Repair the problem. Go to step 9.
Go to step 9.

Is there any abnormality on the O-rings for oil passage to both
sides of cylinder heads?
Is there any damage or contamination with the oil control
valve?

In case of
contamination,
replace the chain
cover with new one
after the inspection
is completed.

Is there any trace mark of contamination on the oil pump?
9

Check the camshaft
condition.

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?
Is the resistance felt?

Go to step 8.

Replace Cam carrier Go to step 10.
and camshaft with
new one.
Go to step 10.

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 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
*Don’t apply too
of Service Manual
much THREE BOND and apply correct
when reassembling. type of THREE
BOND with proper
Refer to the
quantity.
applicable section
of Service Manual
*Please do not
and apply correct
push in oil filter
type of THREE
excessively.
BOND with proper
quantity.
The upper end of
the filter should be
*Please do not
flush with the cam
push in oil filter
carrier.
excessively.
Go to step11.
The upper end of
the filter should be
flush with the cam
carrier.
Go to step 11.

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

Page 16

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.

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

Change the engine
Change the engine
oil and the filter.
oil.
Idle the engine for 5 *Don’t apply too
minutes.
much THREE BOND
when reassembling.
Change the engine
oil and the filter.
Refer to the
applicable section
*Don’t apply too
of Service Manual
much THREE BOND and apply correct
when reassembling. type of THREE
BOND with proper
Refer to the
quantity.
applicable section
of Service Manual
Go to step 12.