Neon L4-2.0L VIN C (1997)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
PCM - Symptomless Misfire DTC's/MIL ON
NO: 18-47-98
GROUP: Vehicle Performance
DATE: Dec. 18, 1998
SUBJECT:
Symptom less Misfire
Diagnostic Trouble Codes
(DTC's)
MODELS:
1997 - 1999 (PL) Neon
NOTE:
THIS INFORMATION APPLIES TO VEHICLES EQUIPPED WITH A 2.0L SOHC/DOHC ENGINE BUILT PRIOR TO NOV. 3, 1998 (MDH
1103XX).
SYMPTOM/CONDITION:
Some vehicles may exhibit a condition where the MIL illuminates for misfire but no reasons can be found for the misfire fault occurrence. In some cases,
there may be minor engine roughness on initial cold engine start-up. Customers may explain the condition as a MIL illumination "only" with no other
symptoms felt or noticed. In many cases the occurrence is experienced on a cold engine start.
DIAGNOSIS:
Using the Mopar Diagnostic System (MDS/MDS2) or the Diagnostic Scan Tool (DRB III(R)) with the appropriate Diagnostic Procedures Manual, verify
all engine/transmission systems are functioning as designed. If non misfire related Diagnostic Trouble Codes (DTC's) are present, record them on the
repair order and repair as necessary before proceeding further with this bulletin. If SINGLE or MULTIPLE CYLINDER MIS-FIRE DTC's are present,
follow all mis-fire diagnostics listed in the appropriate Diagnostic Procedures Manual before proceeding with this flash repair. If no cause for the
MIS-FIRE DTC's are found, perform the Repair Procedure.
NOTE:
WHENEVER A POWERTRAIN CONTROL MODULE (PCM) IS REPLACED DUE TO FAILURE, THE SOFTWARE OF THE
REPLACEMENT CONTROLLER SHOULD BE VERIFIED FOR THE LATEST REVISION LEVEL. USE THE FLASH PROCEDURE TO
UPDATE REPLACED CONTROLLERS AS NECESSARY.
EQUIPMENT/PARTS REQUIRED:
1
CH6000
Scan Tool (DRB III(R))
1
CH7035
General Purpose Interface Bus Cable (GPIB)
1
CH7000/7001
J1962 Cable
1
04669020
Label - Authorized Software Update
1
04275086
Label Authorized Modification
NOTE:
THE MDS AND DRB III(R) ARE REQUIRED TO PERFORM THIS REPAIR AND THE SYSTEM MUST BE OPERATING WITH RELEASE
21 OR HIGHER AND TIL CD RELEASE 1175 OR HIGHER MUST BE INSTALLED.
REPAIR PROCEDURE:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software (calibration changes).
1.
Connect the MDS (Mopar Diagnostic System) and DRB III(R) (Scan Tool) to the vehicle and power them up.
2.
Use the arrow keys and select # 2 CONNECT TO MDS 1 OR MDS 2 on the DRB III(R) MAIN MENU Screen.
3.
Select # 1 MDS DIAGNOSTICS OR DRB UPDATE on the DRB III(R).
4.
Use the arrow keys and select DIAGNOSTIC MENU on the MDS, then press NEXT MENU.
5.
Use the arrow keys and select VEHICLE CONTROLLER PROGRAMMING on the MDS, then press NEXT MENU.