IK0700079 - SCR Vehicles Setting DEF Quality Faults due to Crossed DEF Tank Coolan... Page 1 of 5

Countries:

CANADA, UNITED STATES Document ID: IK0700079

Availability:

ISIS, FleetISIS, NotSIR

Revision:

12

Major System:

EXHAUST

Created:

9/22/2014

Current Language: English

Last Modified: 10/6/2017

Other Languages: NONE

Author:

Viewed:

Keith Kierzek

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Title : SCR Vehicles Setting DEF Quality Faults due to Crossed DEF Tank Coolant Lines or Inverted DEFTHV
Applies To : All SCR Vehicles

CHANGE LOG
Dealers: Please refer to the change log text box below for recent changes to this article:
10/04/2017 - Added Figure 4 DEF Supply line graphic to step 3
09/27/2017 - Modified DEF line routing diagram on EPA 2017 graphic
08/08/2017 ­ Added A26 graphic
06/19/2017 - Added step 3.
03/23/2017 - Updated SPN descriptions.
03/15/2017 - Removed step 4 guidance, changed diag. steps
01/20/2017 ­ Removed crossed lines at DEF tank option




DESCRIPTION
This document will guide the user through determining the cause of fault code 3363-16 (FC1713) on vehicles equipped with SCR. BEFORE replacing any
components, verify the DEF tank coolant lines are properly routed and the Diesel Exhaust Fluid Tank Heater Valve (DEFTHV) is facing the proper direction
according to the procedure below.
NOTE: The example used below is a typical DEF tank coolant line routing for a ProStar with an ISX. Other models may vary, but same failure mode
may still exist.

SYMPTOM(s)
Diagnostic Trouble Code(s) & Dashboard Indicator Light(s):
DTC

Description

SPN 3363 FMI 16
(FC1713)

Aftertreatment 1 Diesel Exhaust Fluid Tank Heater - Data Valid But Above Amber
Normal Operating Range - Moderately Severe Level
Warning Light

Light

3364­10

Aftertreatment Diesel Exhaust Fluid Quality - Abnormal Rate of Change

3364­18

Aftertreatment Diesel Exhaust Fluid Quality - Data Valid But Below Normal Amber
Operating Range ­ Moderately Severe Level
Warning Light

3516­10

DEF Quality Sensor abnormal rate of change

Amber
Warning Light

3516­18

DEF Quality Low - Moderately Severe level

Amber
Warning Light

4094- 31

NOx limits exceeded due to Insufficient Diesel Exhaust Fluid Quality:
Condition Exists

Amber
Warning Light

Amber
Warning Light

Customer Observations or Concerns:
Amber Warning Light (

)

SPECIAL TOOL(s) / SOFTWARE
NOT APPLICABLE

SERVICE PARTS INFORMATION
Kit Description

Vehicle
Family

Part
Number

Quantity
Required

Ordering
Instructions

ISX/ISB Diesel Exhaust Fluid Tank
Heater Valve (DEFTHV)

ALL

3856343C1

1

Source Locally

ALL

3998612C1

1

Source Locally

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IK0700079 - SCR Vehicles Setting DEF Quality Faults due to Crossed DEF Tank Coolan... Page 2 of 5

N13 Diesel Exhaust Fluid Tank Heater Valve
(DEFTHV)
N9/10 Diesel Exhaust Fluid Tank
Heater Valve (DEFTHV)

WorkStar

4029783C1

1

Source Locally

N9/10 Diesel Exhaust Fluid Tank
Heater Valve (DEFTHV)

DuraStar

3856343C1

1

Source Locally

4064184C1

1

Source Locally

EPA 2017 Diesel Exhaust Fluid Tank Heater
ALL
Valve (DEFTHV)

DIAGNOSTIC STEP(s)
Step Action

1

Decision

DIAGNOSTIC: Locate supply line. The DEFTHV should be installed on the DEF tank coolant supply line. Verify the lines are not crossed Yes: Go to Step 2.
as shown in Figure 1 or Figure 2 below.

Use this diagram for EPA 2013 vehicles:

No: Remove the DEF tank
coolant lines from the Parker
fittings and/or orient them
properly Retest for 3363-16
(FC1713)

NOTE: Hose pinchers can b
used to clamp the hoses so
coolant does not drain out.

Figure 1: DEF Tank Coolant Lines possibly Crossed at the Parker Fittings for EPA 2013 vehicles

Use this diagram for EPA 2017 vehicles:

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Figure 2: DEF Tank Coolant Line orientation for EPA 2017 vehicles

Are the DEF tank coolant lines routed properly (not crossed)?

Step Action

Decision

DIAGNOSTIC: Verify the DEFTHV is facing the correct direction on the vehicle. Locate DEFTHV part number(In red box), see Figure 2
below. Correct direction of supply coolant flow is towards the DEF tank.
NOTE: Electrical connectors of valve may face multiple directions.

Yes: Go to Step 3

If diagnosing fault codes othe
than 3363­16 (FC1713) refer
associated FCAP.

2

No: Reorient valve to correct
direction, clear codes and rete

Figure 3: DEFTHV Direction
Is the DEFTHV facing the proper direction on the vehicle?

Step Action

3

DIAGNOSTIC: Detecting stuck DEF tank heater valve.

Decision
Yes: Replace the DEFTHV.

The DEF tank heater valve is a normally closed valve. At key off, the valve should be in the closed position. Clamp off the return line so
coolant cannot flow backwards through the tank. Disconnect the DEF tank coolant supply line from the DEF sending unit (see supply line No: Retest for fault codes. If
location in Figure 4 below).
other fault codes are present,
see associated FCAPs.

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Figure 4: DEF Sending Unit Line
With the line disconnected, only residual coolant should exit the line. Allow 2 minutes for residual coolant to exit. If a constant, steady
stream is passing through the valve, the valve is stuck open.
After 2 minutes with the coolant line disconnected, is there a constant, steady stream of coolant exiting the supply line?

REPAIR STEP(s)
For removal and installation of DEF heater components, see Diesel Exhaust Fluid (DEF) System section in the appropriate Exhaust and Aftertreatment
System with DPF and SCR Service Manual. Links to these manuals are given in the resources section below.

WARRANTY INFORMATION
Warranty Claim Coding:
For inverted or failed DEFTHV:
Group: 18160 - Coolant Lines / Hoses
Noun:

793 - Tank DEF, Coolant Flow Valve

For engine to coolant valve supply line:
Group: 18160 - Coolant Lines / Hoses
Noun: 750 - Hose, Engine to Coolant Valve Supply Line
For coolant valve to tank supply line:
Group: 18160 - Coolant Lines / Hoses
Noun: 751 - Hose, Coolant Valve to Tank
Note: If problem is found, put iKnow article in claim comments section.

OTHER RESOURCES
Master Service Information Site
Service Repair Time Home Page
Bus Exhaust Aftertreatment System with DPF and SCR Service Manual
Star and 9000 Series Exhaust Aftertreatment System with DPF and SCR Service Manual
Feedback Information

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Staff
ID

Client
ID

Comments

Created
Date

DY28589

You received the following feedback From: dy28589 - Austin Ball Email Address: [email protected] Job Classification: SE006, Service Foreman Dealer: CUMBERLAND INTL
TRUCKS Feedback: You need to add a picture for the 2013 model where the lines tie in to each engine. Label then as supply and return. Also you need to label connections at def
tank as supply and return. Your pictures you have now on this article and others are confusing people.

10/16/2017
3:27:17 PM

DYYSCS3

You received the following feedback From: dyyscs3 ­ Stephen Sudol Email Address: [email protected] Job Classification: SE008, Service Technician Dealer:
DELUXE INTL TRUCKS, INC Feedback: Need a good picture showing the Maxxforce DT. Both lines appear to be towards the front of the engine

10/23/2017
6:35:28 AM

You received the following feedback From: dyyscs3 ­ Stephen Sudol Email Address: [email protected] Job Classification: SE008, Service Technician Dealer:
DYYSCS3
DELUXE INTL TRUCKS, INC Feedback: Need a better picture for the Maxxforce DT. Both lines go up towards the front of the engine

10/26/2017
7:35:30 AM

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