Instruments - Incorrect Average MPG Reading
NUMBER: 08-024-03GROUP: Electrical
DATE: Aug. 15, 2003
THIS BULLETIN IS BEING PROVIDED IN ADVANCE. THE DRBIII(R) MUST BE AT 56.1 LEVEL AND THE TechCONNECT MUST BE OPERATING WITH CIS CD2140 OR HIGHER. BOTH WILL BE AVAILABLE SEPTEMBER 04, 2003.
SUBJECT:
Incorrect Average MPG Reading Displayed By EVIC
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software.
MODELS:
2004 (KJ) Liberty (Domestic Market)
NOTE:
This bulletin applies to vehicles built prior to August 04, 2003 and equipped with a 3.7L engine (Sales Code = EKG).
SYMPTOM/CONDITION:
The customer may experience an incorrect Average Miles Per Gallon (MPG) fuel economy reading, as displayed by the Electronic Vehicle Information Center (EVIC). Depending upon customer driving habits, the incorrect Average MPG display maybe approximately three (3) miles per gallon less than actual.
DIAGNOSIS:
Using a Scan Tool (DRBIII(R)) with the appropriate Diagnostic Procedures Manual, verify all engine systems are functioning as designed. If DTCs are present record them on the repair order and repair as necessary before proceeding further with this bulletin.
If a vehicle is in for service perform the Repair Procedure.
PARTS REQUIRED:
SPECIAL TOOLS/EQUIPMENT REQUIRED:
NOTE:
An updated J1962 cable has been released. This cable has a red colored connector at the DRBIII(R) connection. Use this cable whenever a flash is being preformed.
REPAIR PROCEDURE:
1. Connect a battery charger and set as close to 14 volts charge as possible.
2. Reprogram the PCM using the TechCONNECT Workstation and DRBIII(R).
NOTE:
Whenever a controller is replaced or reprogrammed, the software in the controller and DRBIII(R) must be verified as having the latest revision level.
NOTE:
Due to the PCM reprogramming procedure, a DTC may be set in other modules within the vehicle, as equipped. Some DTC's may cause the MEL to illuminate. All DTC's relate to a loss of communications with the module that is being reprogrammed. Check all modules, record any faults, and erase these faults prior to returning the vehicle to the customer. Erase any faults in the PCM only after all other modules have had their faults erased.
NOTE:
The following steps are required by law.
3. Type the necessary information on the "Authorized Software Update Label" p/n 04669020 (Fig. 1). Attach the label to the PCM as necessary and cover the label(s) with the clear plastic overlay.
4. Type the necessary information on the "Authorized Modification Label" p/n 04275086AB and attach near the VECI label (Fig. 2).
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
FAILURE CODE: