GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Engine 🢒 Engine Controls - 6.6L (LLY) 🢒 DTC P0611, P1293, P1294, P1295, P1296, P1658, or P1687

Circuit Description

This diagnostic applies to internal microprocessor integrity conditions within the fuel injection control module (FICM).

DTC Descriptor

This diagnostic procedure supports the following DTCs:

    • DTC P0611 Fuel Injector Control Module Performance
    • DTC P1293 Injector Circuit Low to High Current Transition Time Bank 1
    • DTC P1294 Injector Circuit Low to High Current Transition Time Bank 2
    • DTC P1295 Injector Circuit High to Low Current Transition Time Bank 1
    • DTC P1296 Injector Circuit High to Low Current Transition Time Bank 2
    • DTC P1658 Fuel Injector Control Module Driver Performance
    • DTC P1687 Fuel Injector Control Module Driver Stuck On

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check - Engine Controls?

Go to Step 2

Go to Diagnostic System Check - Engine Controls

2

Replace the fuel injection control module (FICM). Refer to Fuel Injector Control Module Replacement .

Did you complete the replacement?

Go to Step 3

--

3
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze/Frame Failure Records.

Did the DTC fail this ignition?

Go to Step 1

`

Go to Step 4

4

Observe the Capture Info with a scan tool.

Are there any DTCs that have not been diagnosed?

Go to Diagnostic Trouble Code (DTC) List

System OK