IK1201012 ­ 731­16/18 Knock Detected

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Countries:

CANADA, COLOMBIA, UNITED Document
STATES, PUERTO RICO
ID:

Availability:

ISIS

IK1201012

Revision:

3

Major System: ENGINES

Created:

11/11/2013

Current
Language:

English

Last
Modified:

4/3/2014

Other
Languages:

NONE

Author:

Jay
Weston

Viewed:

3705
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33

5

Title : 731-16/18 Knock Detected
Applies To : Big Bore Engines with the latest 3.15 Software Level (Calibration ID
xxxxARxx or higher)

CHANGE LOG
If this iKNow Article is being revised, please type in the text box what has changed in the article. The change log is meant for
Dealers to be able to see what has updated/changed in the article.
4/2/14 Split FMI's into known failure modes, added in tooling reference, added reference for Misfire diagnosics. Updated
information for new calibration release

SPN

FMI




Description

731

18

Knock detected: Unexpected Fueling Without Demand

731

16

Knock detected: Cylinder Acceleration Above Normal

What the Driver will see when fault code sets:

•
•
•
•

Stop Engine Lamp Illuminated
Audible alarm sounding due to Stop Engine Lamp
Engine Shut Down without turning the ignition key off
The ability to restart the engine may be lost. NOTE Do not restart the engine until the diagnostics for Step 1 have been
completed

NOTE: This procedure needs to be followed anytime the 731 faults are logged. If cleared without a key cycle it will clear the fault display but
the monitor in the ECM can still be active allowing for faults reappearance of the fault, stop engine lamp, and shut down.
********Clearing 731 Fault Codes********
•
•
•
•
•
•

Hook up to the truck using an Engine Service Tool (EST) though the 9 Pin diagnostic port
Turn Key switch to the on position
Connect EST to the engine
Clear fault codes
Turn Key Switch off shutting of power to the ECM
Wait 30 sec. allowing the ECM to reach housekeeping (no engine communication on j1939)

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IK1201012 ­ 731­16/18 Knock Detected

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• Turn Key switch on and reconnect verifying fault code clearing

Entry Conditions
731-18 Knock Detected: Unexpected Fueling without Demand

Condition /
Description

Setting Criteria

The monitoring of Fuel
quantity needed to
maintain engine speed.

An increase in
Engine speed with
no increase or a
drop in Fuel
Quantity Demands.

Enable Conditions/ Values

• Vehicle Speed = 0
• Engine Speed > 500rpm 500 RPM
Accelerator pedal = 0%
Manual Transmission Clutch Pedal =
Not Depressed
Coolant temperature is between -9
deg. C and 120 deg. C (15 deg. F and
248 deg. F)
Monitor enabled During Operating
modes (Listed Below) Normal
Operation
Stationary Regeneration
High Altitude
Medium Altitude
Sea Level
PTO
No Active Faults (Listed Below)
Coolant Temperature Sensor Faults
Clutch Switch Faults
Vehicle Speed Sensor Faults

Related Fault Codes

SPN

FMI

Description

Decision

190

0

Engine Overspeed Most Sever
Level

ReferenceIK1201048

190

11

Engine Overspeed Vehicle
Event Fault

Continue with 731 diagnostics

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IK1201012 ­ 731­16/18 Knock Detected

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190

15

Engine Overspeed Detected

Continue with 731 diagnostics

1322

31

Misfire – Multiple Cylinders

Reference Engine Diagnostic Manual if
needed after all 731 steps are completed

1323

31

Misfire – Cylinder 1

Reference Engine Diagnostic Manual if
needed after all 731 steps are completed

1324

31

Misfire – Cylinder 2

Reference Engine Diagnostic Manual if
needed after all 731 steps are completed

1325

31

Misfire – Cylinder 3

Reference Engine Diagnostic Manual if
needed after all 731 steps are completed

1326

31

Misfire – Cylinder 4

Reference Engine Diagnostic Manual if
needed after all 731 steps are completed

1327

31

Misfire – Cylinder 5

Reference Engine Diagnostic Manual if
needed after all 731 steps are completed

1328

31

Misfire – Cylinder 6

Reference Engine Diagnostic Manual if
needed after all 731 steps are completed

Trouble shooting for 731­16/18

731-16 Trouble shooting

Step
1

Action
Remove boost air piping and inspect piping for
large amounts oil.

Decision
Yes: Note: The following repairs do not
need approval from Tech Services
•

Is there large amounts or oil found in the CAC
inlet or outlet?

Replace Turbo Center Section (Refer
to TSI 13-12-05R1 for procedure).
• Clean CAC (Refer to TSI-13-12-17R1)
• Verify that oil has not reached the
DOC. If it has the DOC and DPF need
to be removed to drain. (Refer to Open
TSI's and Service Manual for
procedure). iApprove will need to be
started if damage has occurred.
Location of the iApprove on the
Vehicle Information Page, iApprove
Tab
Note: Verify the engine will bar over by
hand before starting when repairs are
complete.

No: Proceed to Step 2.

2

Condition on the engine

Yes: Diagnose and repair the misfire

• Does the engine have a Misfire?
No: Proceed to Step 3.

3

Note: If the engine will not stay running for
long enough to check depress the clutch
pedal
to disable the monitor
Fault codes

Yes: Trouble shoot Aftertreatment Faults per
the Aftertreatment repair manual 0000003081

Are there any fault codes related to
Aftertreatment?

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IK1201012 ­ 731­16/18 Knock Detected

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No: Proceed to Step 4.
4

Vehicle build dates within 8/1/2011 and
11/1/2011 are subject to a possible flywheel
machining issue.

Yes: Proceed to Step 5.

No: Please Submit a Case File to Big Bore