MIL ON, Erroneous DTC P0107 Set: Overview
NUMBER: 18-08-00GROUP: Vehicle Performance
DATE: June 23, 2000
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-03-99, DATED FEB. 19, 1999, WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE REVISED MODEL YEARS.
SUBJECT:
Erroneous MIL Illumination Due To DTC P0107 - Map Sensor Voltage Too Low
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the JTEC Powertrain Control Module (PCM) with new software (calibration change 96Cal18, 97Cal18 and 98Cal12).
**MODELS:**
**1996** - 1998 (AB) Ram Van
**1996** - 1998 (AN) Dakota
**1996** - 1998 (BR/BE) Ram Truck
1998 (DN) Durango
**1997** - 1998 (TJ) Wrangler
**1996** - 1998 (XJ) Cherokee
**1996** - 1998 (ZJ) Grand Cherokee
NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH GASOLINE ENGINE.
SYMPTOM/CONDITION:
Erroneous MIL illumination with DTC P0107 - MAP SENSOR VOLTAGE TOO LOW. This may occur during downhill decelerations at altitude or when performing off-road maneuvers when the engine is operating over 1500 rpm. The MIL illuminates due to the monitor running during incorrect parameters.
DIAGNOSIS:
Using the Mopar Diagnostic System (MDS2) and or the Diagnostic Scan Tool (DRB III(R)), with the appropriate Diagnostic Procedures Manual, verify that all engine and transmission systems are functioning as designed. If Diagnostic Trouble Codes (DTC's) are present, record them on the repair order and repair as necessary before proceeding further with this bulletin. If no DTC's are present, and the above symptom has been experienced, perform the Repair Procedure.
NOTE:
WHENEVER A POWERTRAIN CONTROL MODULE (PCM) IS REPLACED DUE TO FAILURE, THE SOFTWARE OF THE REPLACEMENT CONTROLLER MUST BE VERIFIED FOR THE LATEST REVISION LEVEL. USE THE FLASH PROCEDURE TO UPDATE REPLACED CONTROLLERS AS NECESSARY.
PARTS REQUIRED:
1 04669020 Label, Authorized Software Update
1 04275086 Label, Authorized Modification
EQUIPMENT REQUIRED:
1 CH6OOO Scan Tool (DRB III(R))
1 CH7035 General Purpose Interface Bus Cable (GPIB)
1 CH700017001 J1962 Cable
1 MDS2
NOTE:
THE MDS2 AND DRB III(R) ARE REQUIRED TO PERFORM PART OF THIS REPAIR. WHEN USING THE MDS2 AND THE DRB III(R), THE SYSTEM MUST BE OPERATING AT CIS CD 2061 OR HIGHER.
POLICY: Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No: 08-19-42-93 0.5 Hrs.
FAILURE CODE: FM - Flash Module