NHTSA ID Number: 10200301
Manufacturer Communication Number: DSM.0032
TSB/Document Date: 2021-08-09
Summary
Blue iQ® Fault Code 7298 Diagnostic Procedure. Fault Code 7298 is triggered when the Blue iQ® Fuel System Control Module (FSCM) detects the pressure/temperature transducer temperature circuit shorted to high source for more than 0.5 seconds.
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- Restores fuel economy
- Stabilizes ethanol
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- For use in both gasoline and diesel engines
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TSB/Document ID: DSM.0032
Replacement Service Bulletin Number:
MFR Communication Date: 2021-07-19
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL/PROPULSION SYSTEM
MFR Component System:
MFR Component Subsystem:
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Diagnostic Procedure
FC
SPN FMI
7298 8290
16
Part(s) Affected
Blue iQ® Fault Code 7298
Title
Engine Gaseous Fuel Temperature Regulator Intake Temperature - Voltage Above Normal
or Shorted to High Source
pressure/temperature transducer temperature circuit
Diagnostic Overview
Fault Code 7298 is triggered when the Blue iQ® Fuel System Control Module (FSCM) detects the
pressure/temperature transducer temperature circuit shorted to high source for more than 0.5 seconds.
Warning Statements Used in this Procedure
NOTICE is used to address practices not related to physical injury, such as best
practices or tips to help an operation or procedure go smoothly and prevent equipment
damage.
Tools Required
Item
Purpose
digital multimeter (DMM)
resistance and voltage measurements
J1939 OBD-II diagnostic interface
connect vehicle to Cummins
® INSITE™ on PC
Cummins® INSITE™
diagnostic software
test probe kit
properly test and back probe circuit terminals and connectors
Never probe an electrical connection with anything other than a properly sized
and shaped test lead; doing so may result in damage to components.
DSM.0032 Ver 1.0
July 19, 2021
Blue iQ® Fault Code 7298 Diagnostic Procedure
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Perform Initial Vehicle Check procedure (refer to DSM.0009) prior to performing
diagnostic instructions listed below.
Circuit / System Verification
1. Connect J1939 diagnostic interface to vehicle and navigate to the “Agility® Fuel Delivery System,
CM1881 AFS(18)” in Cummins® INSITE™.
2. Record all active and stored fault codes and parameters prior to clearing fault codes using INSITE™.
3. Observe and record Engine Gaseous Fuel Temperature Regulator Intake Pressure Sensor data from
INSITE—is data within reasonable operating range?
a. If not within range proceed to Circuit/System Testing.
b. If within range proceed to Step 4.
4. Operate the vehicle in the same conditions for enabling the fault code or within the same conditions that
triggered the fault code based on recorded data.
5. Verify that the fault code does not set. If any fault code sets proceed to Circuit/System Testing.
6. While observing Engine Gaseous Fuel Temperature Regulator Intake Pressure Sensor parameters
in INSITE™ perform a wiggle test on the harness and connectors to test for poor or intermittent
connections.
a. If any fault code sets, proceed to Circuit/System Testing.
b. If no fault code sets, system is functioning to design intent.
7. Review Circuit Schematic and Connector End Views (below) to locate test points.
DSM.0032 Ver 1.0
July 19, 2021
Blue iQ® Fault Code 7298 Diagnostic Procedure
PRINTED AND DOWNLOADED COPIES ARE UNCONTROLLED
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Circuit / Component Diagnosis
Step
1
Ignition Off.
Disconnect FSCM and pressure/temperature transducer harness connectors.
Use a DMM and appropriate test leads to perform wire-to-wire continuity tests on the pinouts below
to measure resistance of each circuit.
Pin 7 –
Blue/
White
Pin 9 –
Blue
Black/White
Blue
Pin 14 –
Violet
Pin 29 –
Black/White
FSCM connector end view
Blue
Violet
Pressure/temperature transducer
connector end view
BLU/WHT
Pressure/temperature transducer circuit diagram
Resistance between zero and 1 ohm?
Yes
Proceed to Step 2.
DSM.0032 Ver 1.0
July 19, 2021
No
Repair/replace affected component(s).
Proceed to Reassembly and Validation.
Blue iQ® Fault Code 7298 Diagnostic Procedure
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Step
2
Reconnect FSCM harness connector.
Disconnect pressure/temperature transducer harness connector.
Ignition On.
Use DMM and appropriate test leads to measure voltage between Pin 1 and Pin 4 of the
pressure/temperature transducer harness connector.
Black/White
Blue/White
Pressure/temperature
transducer connector end view
Voltage equal to zero volts?
Yes
Proceed to Step 3.
Step
3
No
Repair the short to voltage in
pressure/temperature transducer 5V Signal
pressure circuit.
Proceed to Reassembly and Validation.
Connect pressure/temperature transducer harness connector.
Ignition On.
Use DMM and appropriate test leads to back probe for voltage between pressure/temperature
transducer harness connector Pin 1 and Pin 4.
Voltage reading between 0.5V and 4.5 V?
Yes
Replace pressure/temperature
transducer.
Always follow OEM fuel
system depressurization
and repair instructions.
No
Repair pressure/temperature transducer
pressure circuit.
Proceed to Reassembly and Validation.
Proceed to Reassembly and Validation.
DSM.0032 Ver 1.0
July 19, 2021
Blue iQ® Fault Code 7298 Diagnostic Procedure
PRINTED AND DOWNLOADED COPIES ARE UNCONTROLLED
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Reassembly and Validation
After completing all repairs, always perform the following steps to confirm the issue is fixed:
1. Reconnect all connectors and verify connections are secure.
2. Reattach any enclosure covers and close any fuel system doors.
3. Clear fault codes using Cummins® INSITE™ tool.
4. Run vehicle until it reaches normal operating temperature. Refer to OEM instructions.
5. If fault is cleared, return vehicle to duty.
If fault is not cleared, contact Hexagon Agility® Technical Support.
Hexagon Agility® Customer Care and Technical Services
Fuel system warranty or non-warranty product support may be obtained by calling or emailing Hexagon Agility® Customer
Care and Technical Services (CCTS).
Please provide your name, phone number, email address, and complete vehicle information: VIN, year, make, model,
mileage, unit number vehicle owner, and current vehicle location. A service advisor will contact you to arrange vehicle
repair or ship a part.
+1 855 500 2445
(toll-free, U.S. and Canada)
+1 949 267 7745
Support
[email protected]
Parts Orders
[email protected]
Proprietary Statement
The information provided within this document is proprietary and confidential. All prior versions, including updates and revisions forwarded separately, are
proprietary. The information provided by Hexagon Agility® to its customers and clients is solely for the use of those customers and clients. No portion of
this publication may be reproduced or distributed without express written consent of Hexagon Agility®. Hexagon Agility® reserves the right to utilize the
intellectual property contained within this publication as content for any other publication produced by Hexagon Agility®.
Trademark Notice
Hexagon® is a registered trademark of Hexagon Technology AS. Agility® is a registered trademark of Agility Fuel Solutions LLC. Trademarks of other
manufacturers are the property of their respective companies.
Hexagon Agility®
DSM.0032 Ver 1.0
July 19, 2021
3335 Susan Street, Suite 100 Costa Mesa, CA 92626 USA
Blue iQ® Fault Code 7298 Diagnostic Procedure
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