Engine Controls - Engine Spark Knock
NUMBER: 18-006-03GROUP: Vehicle Performance
DATE: Feb. 28, 2003
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-002-01, DATED JAN. 26, 2001, WHICH SHOULD BE REMOVED FROM YOUR FILES. THIS IS A COMPLETE REVISION AND NO ASTERISKS HAVE BEEN USED TO HIGHLIGHT REVISIONS.
THIS BULLETIN IS BEING PROVIDED IN ADVANCE. THE TechCONNECT/MDS2 MUST BE OPERATING WITH CIS CD2128 OR HIGHER, AVAILABLE MARCH 17, 2003.
SUBJECT:
2000 M.Y Engine Spark Knock
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software.
MODELS:
2000 (AB) Ram Van
2000 (AN) Dakota
2000 (BR/BE) Ram Truck
2000 (DN) Durango
NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 3.9L (EHC), 5.2L (ELF), OR 5.9L LIGHT DUTY (EML) GASOLINE ENGINE SEE THE TWO TABLES FOR SPECIFIC APPLICATIONS AND EXCLUSIONS.
NOTE:
THE FOLLOWING EMISSION PACKAGES ARE NOT APPROVED AND ARE EXCLUDED FROM THIS BULLETIN. THE PCM CALIBRATION OF ANY EXCLUDED VEHICLE IS NOT TO BE REPROGRAMMED FOR A SPARK KNOCK COMPLAINT. BEFORE ATTEMPTING A REPROGRAMMING SESSION INSPECT THE TYPE OF VEHICLE AND ENGINE FOR POSSIBLE EXCLUSION.
SYMPTOM/CONDITION:
Some vehicle engines may exhibit a light-to-moderate spark knock condition during acceleration (under load).
DIAGNOSIS PROCEDURES:
1. Using a Scan Tool (DRBIII(R) with the appropriate Diagnostic Procedures Manual, verify all engine systems are functioning as designed. If DTCs are present, other than those listed above, record them on the repair order and repair as necessary before proceeding further with this bulletin.
2. Verify that the following NOTES have been reviewed and completed as necessary.
3. Verify that the engine coolant contains a quality antifreeze. The coolant mixture should consist of 44% to 68% antifreeze.
4. If the only condition experienced is the light-to-moderate engine spark knock, then perform the Repair Procedure.
NOTE:
WHEN PULLING A HEAVY LOAD OR DRIVING A FULLY LOADED VEHICLE USE A PREMIUM UNLEADED FUEL TO HELP MINIMIZE SPARK KNOCK.
NOTE:
WHENEVER A POWERTRAIN CONTROL MODULE 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:
EQUIPMENT REQUIRED:
REPAIR PROCEDURE:
1. Connect a battery charger and set as close to a 14 volts charge as possible.
2. Flash the PCM using the TechCONNECT/MDS2 and DRBIII(R).
NOTE:
DUE TO THE PCM REPROGRAMMING PROCEDURE, A DTC MAY BE SET IN OTHER MODULES (TCM, BCM, MIC, SKIM, ETC.) WITHIN THE VEHICLE, IF SO EQUIPPED. SOME DTC'S MAY CAUSE THE MIL TO ILLUMINATE. ALL DTC'S RELATE TO A LOSS OF COMMUNICATIONS WITH THE MODULE THAT IS BEING REPROGRAMMED. CHECK ALL MODULES, RECORD THE 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 and/or TCM 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:
Could be one or more