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Diagnostic Tips
Blue iQ® Fault Code 6958 Diagnostic Procedure
Diagnostic Tips

Blue iQ® Fault Code 6958 Diagnostic Procedure

oemdtc January 7, 2022 No Comments

NHTSA ID Number: 10203562

Manufacturer Communication Number: DSM.0020

 

Summary

This Diagnostic Procedure document is for Blue iQ® Fault Code 6958, which is a fault triggered when the Blue iQ® Fuel System Control Module (FSCM) detects supply solenoid valve (SSV) power shorted to ground.

 


Gaseous Fuel High Pressure Shutoff Valve Circuit – Current Above Normal or Grounded Circuit

 

Part(s) Affected

supply solenoid valve (SSV)

 

Diagnostic Overview

Fault Code 6958 is a fault triggered when the Blue iQ® Fuel System Control Module (FSCM) detects supply solenoid valve (SSV) power shorted to ground.

 


 

 

DSM.0020 Ver 2.0 Blue iQ® Fault Code 6958 Diagnostic Procedure 1 of 8
October 18, 2021 PRINTED AND DOWNLOADED COPIES ARE UNCONTROLLED
Diagnostic Procedure
Blue iQ® Fault Code 6958
FC
SPN
FMI
Title
6958
6647
6
Gaseous Fuel High Pressure Shutoff Valve Circuit – Current Above Normal or Grounded Circuit
Part(s) Affected
supply solenoid valve (SSV)
Diagnostic Overview
Fault Code 6958 is a fault triggered when the Blue iQ® Fuel System Control Module (FSCM) detects supply solenoid valve (SSV) power shorted to ground.
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 lead kit
properly test and back probe circuit terminals and connectors
infrared non-contact thermometer
accurately measure SSV coil temperature
Never probe an electrical connection with anything other than a properly sized and shaped test lead; doing so may result in damage to terminals.
DSM.0020 Ver 2.0 Blue iQ® Fault Code 6958 Diagnostic Procedure 2 of 8
October 18, 2021 PRINTED AND DOWNLOADED COPIES ARE UNCONTROLLED
Circuit / System Verification
1. Connect the Cummins® INSITE™ diagnostic tool to the vehicle and navigate to the “Agility® Fuel Delivery System, CM1881 AFS(18)”.
2. Record all active and stored fault codes and parameters prior to clearing fault codes using INSITE™.
3. Observe and record Gaseous Fuel High Pressure Shutoff Valve 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 the Gaseous Fuel High Pressure Shutoff Valve parameters in INSITE™ perform a wiggle test on the SSV and FSCM connectors and harness to test for poor or intermittent connections.
a. If any fault code sets, proceed to Circuit/System Testing.
b. If no fault sets, system is functioning to design intent.
7. Review Circuit Schematic and Connector End Views to locate test points.
Perform Initial Vehicle Check procedure (refer to DSM.0009) prior to performing diagnostic instructions listed below.
DSM.0020 Ver 2.0 Blue iQ® Fault Code 6958 Diagnostic Procedure 3 of 8
October 18, 2021 PRINTED AND DOWNLOADED COPIES ARE UNCONTROLLED
SSV Circuit Diagram
Y40
SUPPLY SOLENOID VAVLE
C10
FUEL SYSTEM CONTROL MODULE
DSM.0020 Ver 2.0 Blue iQ® Fault Code 6958 Diagnostic Procedure 4 of 8
October 18, 2021 PRINTED AND DOWNLOADED COPIES ARE UNCONTROLLED
Circuit / System Testing
Step 1
Use a non-contact infrared thermometer to measure SSV coil temperature.
 Record temperature.
 Proceed to Step 2.
Step 2
 Ignition Off.
 Disconnect SSV coil from Blue iQ® harness.
 Use a DMM with appropriate test leads measure resistance across SSV coil connector pins.
 Record the ohms reading.
 Refer to the appropriate 12V or 24V SSV coil resistance table (below) to confirm whether ohms at temperature values are within operating specifications.
coil connector
standalone SSV
coil connector
extended range pressure regulator with integrated SSV
SSV
coil
Marathon pressure regulator
SSV coil
SSV coil connector end view
pin
pin
DSM.0020 Ver 2.0 Blue iQ® Fault Code 6958 Diagnostic Procedure 5 of 8
October 18, 2021 PRINTED AND DOWNLOADED COPIES ARE UNCONTROLLED
Resistance within range per above specifications?
Yes
 Proceed to Step 3.
No
 Replace supply solenoid valve (SSV) coil.
 After repair is complete, proceed to Reassembly and Validation.
12V Supply Solenoid Valve (SSV) Resistance at Temperature Chart
24V Supply Solenoid Valve (SSV) Resistance at Temperature Chart
Standalone Supply Solenoid Valve (SSV)
Step 2 (continued)
DSM.0020 Ver 2.0 Blue iQ® Fault Code 6958 Diagnostic Procedure 6 of 8
October 18, 2021 PRINTED AND DOWNLOADED COPIES ARE UNCONTROLLED
Yes
 Proceed to Step 3.
No
 Replace supply solenoid valve (SSV) coil.
 After repair is complete, proceed to Reassembly and Validation.
12V Supply Solenoid Valve (SSV) Resistance at Temperature Chart
24V Supply Solenoid Valve (SSV) Resistance at Temperature Chart
Marathon Extended Range Pressure Regulator Integrated Supply Solenoid Valve (SSV)
Resistance range per above specifications?
Step 2 (continued)
DSM.0020 Ver 2.0 Blue iQ® Fault Code 6958 Diagnostic Procedure 7 of 8
October 18, 2021 PRINTED AND DOWNLOADED COPIES ARE UNCONTROLLED
Step 3
 Ignition Off.
 Disconnect Blue iQ® harness from FSCM.
 Use a DMM and appropriate test leads to measure resistance from SSV harness connector Cavity A to known good ground.
Resistance reading between zero and 1 ohms?
Yes
 Repair or replace Pink wire from Cavity A of SSV harness connector to FSCM harness connector Pin 53. Refer to DSM.0036 Harness and Wire Repair Manual.
 After repair is complete, proceed to Reassembly and Validation.
No?
 Proceed to Step 4.
Step 4
 Ignition Off.
 Use a DMM and appropriate test leads to measure resistance from SSV harness connector Cavity A to SSV harness connector Cavity B.
Resistance reading between zero and 1 ohms?
Yes
 Repair or replace Pink wire from Cavity A of SSV harness connector to FSCM harness connector Pin 53. Refer to DSM.0036 Harness and Wire Repair Manual.
 Repair or replace White/Black wire from Cavity B of SSV harness connector to FSCM harness connector Pin 20. Refer to DSM.0036 Harness and Wire Repair Manual.
 After repair is complete, proceed to Reassembly and Validation.
No
 FSCM fault suspected; contact Hexagon Agility® Technical Support.
SSV harness connector end view
Pink wire
Black wire
SSV harness connector end view
Pink wire
White/Black wire
DSM.0020 Ver 2.0 Blue iQ® Fault Code 6958 Diagnostic Procedure 8 of 8
October 18, 2021 PRINTED AND DOWNLOADED COPIES ARE UNCONTROLLED
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.
833-4-HEX-CARE
(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. Blue iQ® is a registered trademark of Agility Fuel Systems LLC. Trademarks of other manufacturers are the property of their respective companies.
Hexagon Agility® 3335 Susan Street, Suite 100 Costa Mesa, CA 92626 USA www.hexagonagility.com

 

 

 

 

 


1 Affected Product

Equipment

BRAND PART NO. PRODUCTION DATES
AGILITY FUEL SYSTEMS AGILITY FUEL SYSTEMS

 

 


1 Associated Document

Manufacturer Communications

DSM.0020 Ver 2.0
October 18, 2021

https://www.nhtsa.gov/recalls?nhtsaId=10203562

MC-10203562-9999.pdf 463.919KB

MC-10203562-9999

 

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