plug 4 circuit failure - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 4 (permalink) Old 08-14-2009, 07:48 PM Thread Starter
 
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plug 4 circuit failure

2006 GMC 2500 6.6 Duramax - I have owned this truck for over a year and it's the best I have ever had. The "check engine" light is on and my code reader says "plug 4 - circuit failure" Any advise on repair?
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post #2 of 4 (permalink) Old 08-14-2009, 09:11 PM
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Start by checking all your connections.

Smoke!!! Smoke!!!! Are you Smoking yet?
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post #3 of 4 (permalink) Old 08-14-2009, 09:45 PM
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P0674 Glow plug #4 Circ failure

Glow Plug 4 connector likely R&R, or Glow Plug is bad. Some tips break.

Do you have a tuner you can clear the code with? Some people have had luck clearing and it went away.

Check this first. Make sure yours has been reflashed.

Subject: Product Emission-Engine Glow Plug System Concern-Reprogram Glow Plug Control Module #06522 - (03/24/2006)



Models: 2006 CHEVROLET SILVERADO, EXPRESS, KODIAK

2006 GMC SIERRA, SAVANA, TOPKICK

EQUIPPED WITH 6.6L V8



--------------------------------------------------------------------------------

Condition
Certain 2006 Chevrolet Silverado, Express, Kodiak; and 2006 GMC Sierra, Savana, Topkick model trucks equipped with a 6.6L V8 (RPO LLY - VIN 2 or RPO LBZ - VIN D) Duramax Diesel engine, may have a condition in which the engine glow plugs are overstressed electronically, causing glow plug failure and engine damage in some cases.

Correction
Dealers are to reprogram the Glow Plug Control Module (GPCM).

Vehicles Involved
Involved are certain 2006 Chevrolet Silverado, Express, Kodiak; and 2006 GMC Sierra, Savana, Topkick model trucks equipped with a 6.6L V8 (RPO LLY - VIN 2 or RPO LBZ - VIN D) Duramax Diesel engine and built within these VIN breakpoints:

Year
Division
Model
From
Through

2006
Chevrolet
Silverado
6E100002
6E232880

6F100001
6F218045

2006
Chevrolet
Express
61100002
61221358

2006
Chevrolet
Kodiak
6F400002
6F422129

2006
GMC
Sierra
6E100003
6E232523

6F100002
6F216758

2006
GMC
Savana
61100022
61221125

2006
GMC
TopKick
6F400010
6F904910


Important: Dealers are to confirm vehicle eligibility prior to beginning repairs by using the system below. Not all vehicles within the above breakpoints may be involved.

-- GM dealers should use GMVIS.


For dealers with involved vehicles, a listing with involved vehicles containing the complete vehicle identification number, customer name, and address information has been prepared and will be provided through the applicable system listed below. Dealers will not have a report available if they have no involved vehicles currently assigned.

-- US GM - GM DealerWorld Recall Information

-- Canadian GM - GMinfoNet Recall Reports

-- Export dealers - sent directly to dealers

The listing may contain customer names and addresses obtained from Motor Vehicle Registration Records. The use of such motor vehicle registration data for any purpose other than follow-up necessary to complete this recall is a violation of law in several states/provinces/countries. Accordingly, you are urged to limit the use of this report to the follow-up necessary to complete this recall.

Parts Information
Do not attempt to order the calibration number from GMSPO. The calibration numbers are programmed into Control Modules via a Techline Tech 2 scan tool and the Techline Information System (TIS) 2000 terminal with the calibration update. Use data version 3.5 for 2006 or later, broadcast to dealers, and available on TIS2WEB, March 19, 2006 (US), March 22, 2006 (Canada); and on TIS CD-ROM version 4.0 / 2006, which will be mailed to dealers by April 18, 2006. To complete this service procedure, the Tech 2 must also be updated to release 26.002 or greater. If you cannot access the calibration, call the Techline Customer Support Center at 1-800-828-6860 (English) or 1-800-503-3222 (French) and it will be provided.

Service Procedure
Glow Plug Control Module Reprogramming


Notice: Before reprogramming, please check the battery condition to prevent a reprogram error of the Glow Plug Control Module due to battery discharge. If the vehicle battery is not fully charged, ensure that it is fully charged prior to performing the reprogramming procedure.

The ignition switch must be in the proper position. The Tech 2 prompts you to turn ON the ignition, with the engine OFF. DO NOT change the position of the ignition switch during the programming procedure, unless instructed to do so.

Make certain all tool connections are secure, including the following components and circuits:

• The RS-232 communication cable port

• The connection at the data link connector (DLC)

• The voltage supply circuits

DO NOT disturb the tool harnesses while programming. If an interruption occurs during the programming procedure, programming failure or control module damage may occur.

DO NOT turn OFF the ignition if the programming procedure is interrupted or unsuccessful. Ensure that all control module and DLC connections are secure and the TIS terminal operating software is up to date. Attempt to reprogram the control module. If the control module cannot be programmed, replace the control module.

Tech 2 Remote Programming
Use the normal "request method" through "Service Programming System" to request information from the vehicle.
At the Techline Terminal enter TIS SPS programming system.
Select Tech 2 from the "Select Diagnostic Tool" window.
Select Reprogram ECU from the "Select Programming Process" window.
Select Vehicle from the "Select ECU Location" window.
Select Next to go to the "Preparing for Communication" instruction Screen.
Select Next to view the "Validate Vehicle ID Number" screen. If the Vehicle ID Number does not appear on the screen, manually insert the VIN into the VIN window of the "Validate Vehicle ID Number" screen.
Select Next to view the "Supported Controllers" screen.
Select Glow Plug Control Module from "Supported Controllers" window.
Select Next to view the "Select Programming Type" window.
Select Normal from the "Select Programming Type" window.
Select Next to view the "Service Programming System Calibration Selection" screen.
Select Next to view "Summary" screen.
Verify that current and selected calibration information is displayed on the "Summary" screen.
Select Next to download the calibration to the Tech 2.
Back at the vehicle enter "Service Programming Systems".
Select "Program ECU" and follow on screen instructions.
Make sure to turn OFF the ignition for 30 seconds after the "Programming is Complete". Clear diagnostic trouble codes (DTCs), if required.
CALIFORNIA, MASSACHUSETTS, MAINE, & VERMONT VEHICLES ONLY: Install a Recall Identification Label. Also, for California vehicles complete a "Proof of Correction"

-Josh-
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Last edited by BombDocDiesel; 08-14-2009 at 09:49 PM.
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post #4 of 4 (permalink) Old 08-14-2009, 10:29 PM
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good info there Josh!

Aaron the Crazy Canuck
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