IK1201012 ­ MaxxForce 13 DTC 731­16/18 Knock Detected

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SB-10055002-6382

CANADA, UNITED
STATES, PUERTO
RICO

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IK1201012
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ISIS

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2

ENGINES

Created:

11/11/2013

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Modified:

1/17/2014

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Author:

Jay
Weston

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Title : MaxxForce 13 DTC 731-16/18 Knock Detected
Applies To : Big Bore Engines with the latest 3.15 Software Level
(Calibration ID xxxxARxx or higher)

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
After a key cycle continued Stop Engine Lamp Illumination an Audible Alarm

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

Condition / Description

Setting Criteria

Enable Conditions/ Values

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IK1201012 ­ MaxxForce 13 DTC 731­16/18 Knock Detected

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.

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• 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 ­ 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

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IK1201012 ­ MaxxForce 13 DTC 731­16/18 Knock Detected

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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

190

15

Engine Overspeed Detected

Continue with 731
diagnostics

Trouble shooting for 731-16/18

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.

Step
1

Action
Remove boost air piping and inspect piping
for signs of oil.

Decision
• Yes ­ Repair High Pressure Turbo
using Turbo charger cartridge. (Refer
to TSI­13­12­05R1)
• No - Proceed to Step 2

Does it show signs of oil?

2

Verify Repair History with truck owner and
the Warranty History tab on ISIS.

• Yes - Proceed to Step 3.
• No - Proceed to Step 4.

Has the unit had a recent repair for a failed
Turbo?

3

Verify complete injector replacement was
done

• Yes – Proceed to Step 4.
• No – Replace the injectors that were
not addressed at the time of the
failure and retest for 731 fault codes

Were all the injector replaced at the time of
the turbo failure?

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IK1201012 ­ MaxxForce 13 DTC 731­16/18 Knock Detected

4

Vehicle test drive at low idle creep.

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• Yes ­ Proceed to Step 5.
• No ­ Troubleshoot the VSS reporting
issue.

In the event that Vehicle speed does not
register when the vehicle is motion, the
monitor for the 731 fault codes will see the
vehicle in a parked state. This will cause
the fault to set while the vehicle is in
motion.
• For a manual transmission select
the lowest gear in the transmission,
release the parking brake and slowly
let the clutch out.
Allowing only engine speed at idle to
drive the truck (600 - 650 RPM).
• For Automatic transmissions put the
gear selector into manual
mode and lock it into the lowest gear
available. Use the accelerator pedal
to engage the transmission and let
off Allowing only engine speed at
idle to drive the truck (600­650
RPM)
• Monitor the vehicle speed using an
Engine Service Tool (EST).
Is vehicle speed registering (ex. 3.5 k/hr. or
5 MPH in low on a 10 speed)?

5

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

Is the vehicle build date with this range?

• Yes - Please submit a Case File
referencing the fault code logged and
a possible flywheel issue. A tool will
need to be shipped out to check the
timing.
• No - Please Submit a Case File to
Big Bore Engine Support for further
assistance.

********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)
Turn Key switch on and reconnect verifying fault code clearing

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IK1201012 ­ MaxxForce 13 DTC 731­16/18 Knock Detected

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THIS DOCUMENT WILL BE UPDATED PERODICALLY WITH ADDITIONAL INFORMATION.

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