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ENP-733 - De-rate and Hours to Empty Calibrations - Blue iQ Cummins B6.7L CNG
Diagnostic Tips

ENP-733 - De-rate and Hours to Empty Calibrations - Blue iQ Cummins B6.7L CNG

oemdtc June 10, 2020 No Comments

NHTSA ID Number: 10174934

Manufacturer Communication Number: ENP-733

Summary

The Agility Fuel Solutions (Agility®) service team identified two fuel system ECU (electronic control unit) calibration issues in Blue iQ CNG (compressed natural gas) fuel systems for the Cummins® 6.7L engine. Issue 1: Program incompatibility causes throttle response to drop to zero when an attempt is made to operate in economy (Eco) mode. Issue 2: "Liters to Empty" Smart Gauge function is not programmed; at fuel levels less than 5-10%, zero throttle response results. Agility® is coding a new ECU calibration to remedy these conditions which will be distributed through the Cummins INSITE customer online portal.

 

3 Affected Products

Equipments

BRAND PART NO. PRODUCTION DATES
AGILITY FUEL SYSTEMS CNG FUEL SYSTEM
AGILITY FUEL SYSTEMS CNG FUEL TANK
AGILITY FUEL SYSTEMS CNG PRESSURE RELIEF DEVIC

Blue iQ Cummins B6.7L CNG
De-rate and Hours to Empty Calibrations

ENP-733

April 27, 2020

 

1. Introduction

The Agility Fuel Solutions (Agility®) service team has identified two fuel system ECU (electronic control unit) calibration issues in Blue iQ CNG (compressed natural gas) fuel systems for the Cummins® 6.7L engine as follows:

Issue 1: Program incompatibility causes throttle response to drop to zero when an attempt is made to operate in economy (Eco) mode.

Issue 2: “Liters to Empty” Smart Gauge function is not programmed; at fuel levels less than 5-10%, zero throttle response results.

Agility® is coding a new ECU calibration to remedy these conditions which will be distributed through the Cummins INSITE customer online portal.

Effective immediately and continuing until affected units receive the new calibration, Agility® recommends the following precautionary measures:

  • Do not operate the vehicle in Eco mode, and
  • Do not rely on the Liters to Empty Smart Gauge function; always keep the vehicle well-fueled to avoid an unexpected empty condition.

 

2. Affected Units

Two Autocar (VINs 232122 and 232123) and 52 TICO yard tractors equipped with Agility® Blue iQ CNG fuel systems and Cummins® 6.7L engines.

 

3. Tools Required

  1. Cummins® INLINE7™ or NEXIQ Technologies® USB-Link 2™
  2. Cummins® Calterm™

 

4. Diagnostic Symptoms and Preventative Measures

Issue 1: Zero throttle response when Eco Mode is enabled. Figure 1

 

Figure 1.

Smart Gauge green LED (1) illuminated and “Eco Mode Enabled” message (2) displayed.

             

ACTION: Press and hold the right Smart Gauge function button until the display changes to

“Eco Mode Disabled” and the red LED illuminates to disable Eco Mode. Figure 2

 

Figure 2.

Smart Gauge right function button (3), red LED (1) illuminated, and “Eco Mode Disabled” message (2) displayed. The Smart Gauge should display “Eco Mode Disabled” during unit operation until the ECU calibration update is released. Figure 2

Issue 2: Zero throttle response at low fuel levels less than 5-10%.  

 

Figure 3.

Smart Gauge red LED (1) illuminated and “Derate Active” message (2) displayed.

ACTION: Unit must refuel to disable the derate condition automatically.

ALTERNATIVE ACTION: Temporarily disable derate by holding down the Override button; this allows units to be operated on CNG pony tanks.

 

5. Corrective Action / Procedure

Issues 1 and 2: Install new Agility® ECU calibration, software version TBA via Cummins® INSITE using the following procedure:

Step 1: Using either a NEXIQ® USB-Link 2 or Cummins® INLINE7 tool, verify OBD-II connection is correctly selected. Figure 4.

 

NEXIQ tool programming screens (not shown throughout this procedure) are similar.

Step 2: Click “Connect to ECM” from the left tab menu. Figure 4

Figure 4. 

Initial programming screen. INLINE7 tool connection verification (1) and  Step 2 “Connect to ECM” (2).

Step 3a: Click “Connect.” NOTE: No security type or password credentials are required. Figure 5

 

Step 3a - “Connect” button.

Step 3b: Select “Agility Fuel Delivery System [18]” and click “Connect.” Figure 6.

Figure 6. 

Step 3b - “Agility Fuel Delivery System [18]” and “Connect” button.

 

Step 4: Click “New” and “OK” on the pop-up menus. Figure 7

Step 4 - “New” and “OK” buttons.

Step 5: Once connected, verify ECM connection at the bottom left of the window. Figure 8

 

Figure 8. 

Step 5 - Green circle indicates tool is connected to the ECM. 

 

Step 6: Click “Calibration Selection” from the left tab menu. Figure 9

 

Figure 9. 

Step 6 -“Calibration Selection” tab (6) and Step 7 “ECM/PDD Code Search” button (7).

Step 7: Click “ECM/PDD Code Search” button (Figure 9) and the “Checking for calibration updates” screen will appear. Figure 10

 

Figure 10. 

Step 7 - Checking for calibration updates screen.

Step 8: Wait for a “Successfully found (CAL ID tba)” message to appear in the status box.

When the desired calibration is found, click “Save” and proceed to Step 9. Figure 11

 

Figure 11.

Step 8 - “Successfully found (CAL ID tba)” message in Status box (a) and “Save” button (8).

The following screen will appear if the requested calibration is not found (Figure 12):

 

Figure 12.

Step 8 - Calibration not found screen.

If the calibration was not found, double check the following connections:

  1. Verify stable Wi-Fi signal is present
  2. Confirm NEXIQ® USB-Link 2 or Cummins® INLINE7 tool is connected to OBD-II
  3. Confirm Agility ECU is connected properly to the fuel system chassis harness Repeat Steps 6 through 8.

Step 9: Click the “Exit” button. Figure 12

Step 10: Click the “ECM/PDD” button, add all, and click on the “OK” button. Figure 13

 

Figure 13

Step 10 “ECM/PDD” button (10). 

When these options appear, select “Add All,” and click on the “OK” button.

Step 11: Click/expand all folders (the + buttons), then click on “4354537.” Figure 14

 

Figure 14

Select “Add All” and click “OK.” Figure 15

 

Figure 15

Step 11b. “Add All” and “OK” buttons (11b).

Step 12: Right click on the calibration ID #, then click “Transfer to ECM” in the pull down menu. Figure 16

 

Figure 16. 

Step 12. Select desired Cal ID # from the list, then click “Transfer to ECM” (12).

Step 13: Follow prompts until programming is successful/complete.

Step 14: When complete, click “Disconnect from ECM” tab at upper left menu and close out INSITE. Figure 17

 

Figure 17. Step 14 Disconnect from ECM tab.

 

6. Warranty Information

This procedure is covered under warranty. Standard repair time (SRT) is 0.5 hours. Please refer to Warranty Manual, ENP-067, for warranty reimbursement procedures.

For parts and support, contact Agility® Customer Care: +1 949 267 7745, toll free: +1 855 500 2445 or [email protected]

 

Agility Fuel Solutions | 3335 Susan Street Suite 100 | Costa Mesa, CA 92626 USA  www.agilityfuelsolutions.com

 

Revision Description Date
-- Initial Release 04/27/2020

 


ENP-733
April 27, 2020

https://www.nhtsa.gov/recalls?nhtsaId=10174934

https://static.nhtsa.gov/odi/tsbs/2020/MC-10174934-9999.pdf

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