Compass 4WD L4-2.4L VIN W (2007)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
Engine Controls - Low Accel. Performance/Ticking Noise
NUMBER: 18-031-07
GROUP: Vehicle Performance
DATE: April 28, 2007
THE StarSCAN(R) FLASH FILES FOR THIS BULLETIN MUST BE RETRIEVED FROM THE INTERNET.
StarSCAN(R) SOFTWARE LEVEL MUST BE AT RELEASE 7.04 OR HIGHER FOR THIS BULLETIN.
SUBJECT:
Flash: Launch Performance / Driveability Enhancements
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the GPEC Powertrain Control Module (PCM) with new software.
CAUTION:
VEHICLES EQUIPPED WITH A CVT TRANSMISSION MUST HAVE THE TRANSMISSION CONTROL MODULE (TCM) CHECKED FOR
THE LATEST SOFTWARE LEVEL WHENEVER THE PCM SOFTWARE IS UPGRADED. IF NEWER TCM SOFTWARE IS AVAILABLE, IT
MUST BE INSTALLED.
MODELS:
2007
(MK49)
Compass
2007
(MK74)
Patriot
2007
(PM)
Caliber
NOTE:
This bulletin applies to models equipped with a 1.8L, 2.0L or 2.4L gasoline engine (Sales Code EBA, ECN or ED3) on PM/MK models built before
April 21, 2007 (MDH 0421XX).
SYMPTOM/CONDITION:
Some customers may experience the following:
^
Automatic CVI models - Perceived lack of performance under light to moderate acceleration from a stop.
^
All Models - Ticking Sound intermittently heard from the engine compartment.
Software changes have been made to improve the above bullet points. In addition, changes to maximum RPM in neutral have been made to assist A/C
compressor function during cold ambient temperatures to prevent A/C compressor slugging.
DIAGNOSIS:
Using a Scan Tool (StarSCAN(R)) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all engine Systems are functioning as
designed. If DIG's other than those listed above are present record them on the repair order and repair as necessary before proceeding further with this
bulletin.
If the above symptoms are described by the customer, perform the Repair Procedure.
PARTS REQUIRED: