ATTENTION:
GENERAL MANAGER
PARTS MANAGER
CLAIMS PERSONNEL
SERVICE MANAGER

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IMPORTANT - All
Service Personnel
Should Read and
Initial in the boxes
provided, right.

SERVICE BULLETIN
APPLICABILITY: 2011MY-2013MY Forester 2.5L N/A
SUBJECT: Difficulty Starting, Rough Idle
DTCs P0301, P0302, P0303, P0304
P0340, P0341, P0345, P0346

NUMBER: 11-100-11R
DATE: 05/20/11
REVISED: 11/27/12

INTRODUCTION
If you encounter a customer complaint that the engine is difficult to start, the camshaft
position sensor air gap may be out of specification. This is caused by an irregular stamping of
the camshaft position sensor plate. To remedy the condition, a shim will need to be added to
the Bank 1 (right hand) camshaft position sensor to bring the air gap into specification.
NOTE: DTCs P0341 and P0346 are applicable to 2013MY vehicles only.

PART INFORMATION
• Shim Kit Part Number 10130AA060 contains 8 shims, 0.1 ~ 0.8mm.
Note: The individual part numbers are listed as a reference only, and can not be ordered.
• Camshaft Position Sensor O-Ring Part Number 13099AA050 (replace if necessary).
PART NUMBER

CLEARANCE
(MM)

10130AA070
10130AA080
10130AA090
10130AA100
10130AA110
10130AA120
10130AA130
10130AA140

0.45 – 0.55
0.56 – 0.65
0.66 – 0.75
0.76 – 0.85
0.86 – 0.95
0.96 – 1.05
1.06 – 1.15
1.16 – 1.25

SHIM
THICKNESS
(MM)
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1

TARGET GAP
(MM)
1.25 – 1.35
1.26 – 1.35
1.26 – 1.35
1.26 – 1.35
1.26 – 1.35
1.26 – 1.35
1.26 – 1.35
1.26 – 1.35

continued...
CAUTION: VEHICLE SERVICING PERFORMED BY UNTRAINED PERSONS
COULD RESULT IN SERIOUS INJURY TO THOSE PERSONS OR TO OTHERS.
Subaru Service Bulletins are intended for use by professional technicians ONLY. They
are written to inform those technicians of conditions that may occur in some vehicles, or
to provide information that could assist in the proper servicing of the vehicle. Properly
trained technicians have the equipment, tools, safety instructions, and know-how to
do the job correctly and safely. If a condition is described, DO NOT assume that this
Service Bulletin applies to your vehicle, or that your vehicle will have that condition.

Bulletin Number: 11-100-11R; Date: 11/27/12

SUBARU OF AMERICA, INC. IS “ISO
14001 COMPLIANT”
The international standard for excellence
in Environmental Management Systems.
Please recycle or dispose of automotive
products in a manner that is friendly to our
environment and in accordance with all
local, state and federal laws and regulations.

Page 1

Special Tools
Pulse / Analog Box, SDI Box and SSMIII
Digital Caliper with Depth Attachment

1 - Washer (outside diameter 25.5mm, inside diameter 11.1mm, thickness 1.72mm)
or equivalent in size. Note: If your digital caliper has a depth attachment you do not need the
washer.

continued...
Bulletin Number: 11-100-11R; Date: 11/27/12

Page 2

SERVICE PROCEDURE/INFORMATION
Check the waveforms of the camshaft position sensors using the Pulse/Analog Box, SDI
Box and SSMIII oscilloscope function. For detailed information and instructions, refer
to the applicable Subaru Service Manual, Select Monitor III (SSMIII) - Users Guide and
Subaru Diagnostic System (SDS). The “Help” function will allow you to access the tutorial
information.
Back probing the ECM connector B136
1) Insert Pulse/analog probes in the Pulse/analog Box.
Pulse / Analog Box

The probe end connects
to B136 Pin 26.
The probe end connects
to B136 Pin 15.

The probe end
connects to ground.

CH1, when connected to B136 pin 26, will monitor the right hand camshaft position sensor.
CH2, when connected to B136 pin 15, will monitor the left hand camshaft position sensor.

continued...
Bulletin Number: 11-100-11R; Date: 11/27/12

Page 3

2) Carefully install straight pins to back probe pins 15 and 26.
3) Connect the leads to the straight pins which are back probed at the ECM connector.
Make sure they do not touch each other or ground.
NOTE: Make sure that none of the back probes touch each other or ground.

Normal Waveform
(Normal Pulse)

This is an example of cam sensor reading during the cranking cycle.
Please hit the F7 (Range) key and change the time frame to 100 msec/
div and change the max voltage to 6 volts and the minimum voltage to
-1 volt. Make sure you hit the F11 (OK) key when you are done.

The items in this example have been labeled to
show you the right and left hand. These items will
be labeled CH1 and CH2 on your SSMIII.

continued...
Bulletin Number: 11-100-11R; Date: 11/27/12

Page 4

Normal Waveform
(Normal Pulse)

This example shows a normal reading during the cranking cycle. You
will see three peaks equally spaced, then a longer space. Note that the
right and left hand sensors have the same space, they are just offset.

Abnormal Waveform
(abnormal pulse)

This example shows the right hand sensor has an abnormal reading
during the cranking cycle compared to the left hand sensor.

continued...
Bulletin Number: 11-100-11R; Date: 11/27/12

Page 5

If an abnormal pulse is present, proceed with the following service procedure. If the pulse is
normal, refer to the applicable service manual for additional troubleshooting and diagnostics.
Shim Selection and Installation
1) Record pre-set radio stations.
2) Disconnect negative battery cable.
3) Remove the 2 clips which secure the air intake duct, and then remove air duct.

4) Disconnect the wiring harness connector from the camshaft position sensor.
Camshaft Position Sensor Bank 1 (right hand)

continued...
Bulletin Number: 11-100-11R; Date: 11/27/12

Page 6

Wire Harness Connector

5) Remove the camshaft position sensor from the timing chain cover.

The following steps will determine what size shim will be required. Note: Make sure to
record all measurements.

continued...
Bulletin Number: 11-100-11R; Date: 11/27/12

Page 7

T = 6.4 N•m
(0.7 kgf-m, 4.7 ft-lb)

Camshaft Sensor
Shim (to be added)

Timing Chain Cover

Measurements
A = Top of timing chain cover to camshaft position sensor plate
B = Camshaft position sensor mating surface to the bottom of the sensor

A

B

Camshaft position
sensor plate.

continued...
Bulletin Number: 11-100-11R; Date: 11/27/12

Page 8

Measurement “A” using digital caliper with depth attachment
Note: The camshaft position sensor plate has notches. Do Not measure within the notch;
measure from the top of the plate. Measurement “A” is critical, therefore it needs to be taken
3 times at different locations on the camshaft position sensor plate.

Top of Plate

Notch

Note: When taking measurements, make sure the depth attachment or washer is NOT sitting
on the raised portion of the timing chain cover.
Raised Portion

Below is a line-art illustration of the camshaft position sensor plate.
Top of Plate

Notch

Make sure to measure from the top of the plate. Do Not measure within the notch. On the
initial reading, it may be necessary to rotate the camshaft position sensor plate by rotating the
engine clockwise if the notch interferes with the measurement.
continued...
Bulletin Number: 11-100-11R; Date: 11/27/12

Page 9

Measurement Using Digital Caliper with Depth Attachment
Measurement taken using digital
caliper with depth attachment.

1)
2)

3)
4)
5)
6)

Take a measurement and record the reading.
Using a breaker bar and 22mm socket, place the socket on the crankshaft pulley bolt and
rotate the engine clockwise approximately 70º. Caution: Do not rotate the engine
counter-clockwise, doing so will loosen the crankshaft pulley bolt. If the engine is
accidentally turned counter-clockwise make sure the bolt is re-torqued to proper
specifications when completed.
Take a measurement and record the reading.
Rotate the engine clockwise approximately 70º.
Take a measurement and record the reading.
Use the smallest of the three measurements, and record the result.

Measurement “A” using digital caliper without depth attachment using washer
1) Place washer over hole opening of timing chain cover. The purpose of the washer is
to provide a surface for the caliper to rest on to take the measurement.

continued...
Bulletin Number: 11-100-11R; Date: 11/27/12

Page 10

Measurement taken using digital
caliper with washer.

Make sure to measure from the top of the plate, DO NOT measure within the notch. On the
initial reading, it may be necessary to rotate the camshaft position sensor plate by rotating the
engine clockwise if the notch interferes with the measurement.
1)
2)

3)

Take a measurement and record the reading.
Using a breaker bar and 22mm socket, place the socket on the crankshaft pulley bolt and
rotate the engine clockwise approximately 70º. Caution: Do not rotate the engine
counter-clockwise, doing so will loosen the crankshaft pulley bolt. If the engine is
accidentally turned counter-clockwise make sure the bolt is re-torque to proper
specification when completed.
Take a measurement and record the reading.
continued...

Bulletin Number: 11-100-11R; Date: 11/27/12

Page 11

4) Rotate the engine clockwise approximately 70º.
5) Take a measurement and record the reading.
6) Use the smallest of three measurements and record the result
Measurement “B”
For an accurate measurement, use a flat metal ruler or equivalent.

Measure the camshaft position sensor mating surface (the area that sits flush on the timing
chain cover) to the bottom of the sensor and record measurement.

continued...
Bulletin Number: 11-100-11R; Date: 11/27/12

Page 12

Washer Measurement
Measure the thickness of the washer and record measurement.

Camshaft Position Sensor Air Gap Specification
• 1.3 +/- 0.05mm (1.25 to 1.35mm)
Shim Chart
PART NUMBER

CLEARANCE
(MM)

10130AA070
10130AA080
10130AA090
10130AA100
10130AA110
10130AA120
10130AA130
10130AA140

0.45 – 0.55
0.56 – 0.65
0.66 – 0.75
0.76 – 0.85
0.86 – 0.95
0.96 – 1.05
1.06 – 1.15
1.16 – 1.25

SHIM
THICKNESS
(MM)
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1

TARGET GAP
(MM)
1.25 – 1.35
1.26 – 1.35
1.26 – 1.35
1.26 – 1.35
1.26 – 1.35
1.26 – 1.35
1.26 – 1.35
1.26 – 1.35

Example calculation (no washer used in measuring)
A = Top of timing chain cover to camshaft position sensor plate
B = Camshaft position sensor mating surface to the bottom of the sensor
A = 23.70
B = 22.58
A – B = 1.12 (clearance)
In this example, an 0.2 shim is required.
Clearance (mm)
1.06 – 1.15

Shim Thickness (mm)
0.2

Target Gap (mm)
1.26 – 1.35

continued...
Bulletin Number: 11-100-11R; Date: 11/27/12

Page 13

Example calculation (washer used in measuring)
A = Top of timing chain cover to camshaft position sensor plate (minus the washer thickness).
B = Camshaft position sensor mating surface to the bottom of the sensor
A) 25.42 – 1.72 = 23.70
A = 23.70
B = 22.58
A – B = 1.12 (clearance)
In this example a 0.2 shim is required.
Clearance (mm)
1.06 – 1.15

Shim Thickness (mm)
0.2

Target Gap (mm)
1.26 – 1.35

REASSEMBLY
1) Inspect camshaft position sensor o-ring and replace if necessary.
2)
3)
4)
5)
6)

Install camshaft position sensor and shim. Bolt torque spec 6.4 N•m (0.7 kgf-m, 4.7 ft-lb).
Connect wiring harness connector.
Install air intake duct.
Connect negative battery cable.
Reset radio stations.

WARRANTY/CLAIM INFORMATION
For vehicles within the Basic New Car Limited Warranty period, this repair can be claimed
using:
Labor Description
Cam Sensor Measurement &
Shim Installation

Bulletin Number: 11-100-11R; Date: 11/27/12

Labor Operation#
A817-211

Fail Code
UKM-20

Labor Time
0.5

Page 14