RAM 1500 Truck 4WD V8-5.9L VIN Z LDC (1999)
PROM - Programmable Read Only Memory: Customer Interest
Engine - Spark Knock On Acceleration
NUMBER: 18-004-02
GROUP: Vehicle Performance
DATE: Jan. 28, 2002
THIS BULLETIN SUPERCEDES TECHNICAL SERVICE BULLETIN 18-06-00 REV C, DATED DEC 01, 2000, WHICH SHOULD BE REMOVED
FROM YOUR FILES. THIS IS A COMPLETE REVISION AND NO ASTERISKS HAVE BEEN USED TO HIGHLIGHT REVISIONS. THE MDS2
MUST BE OPERATING WITH CIS CD2099 OR HIGHER.
SUBJECT:
1999 M.Y. Engine Spark Knock
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software (calibration level 99Cal16B,
99Cal17, and 99Cal17A)
MODELS:
1999
(AB)
Ram Van
1999
(AN)
Dakota
1999
(BR/BE)
Ram Truck
1999
(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. THERE ARE CERTAIN EXCEPTIONS. SEE THE TABLE FOR SPECIFIC EXCLUSIONS.
NOTE:
THIS BULLETIN DOES NOT APPLY TO THE FOLLOWING SPECIFIC VEHICLES WHEN EQUIPPED AS LISTED IN THE TABLE. THE
PCM CALIBRATION SOFTWARE OF ANY EXCLUDED VEHICLE IS NOT TO BE REPROGRAMMED FOR A SPARK KNOCK
COMPLAINT. BEFORE ATTEMPTING A REPROGRAMMING SESSION, INSPECT THE VEHICLE, TYPE, ENGINE, TRANSMISSION,
AND EMISSIONS CATEGORY FOR POSSIBLE EXCLUSION.
SYMPTOM/CONDITION:
Some vehicle engines may exhibit a light-to-moderate spark knock condition during acceleration (under load).
