RAM 1500 Truck 4WD V8-4.7L (2008)
Power Distribution Module: Customer Interest
Antitheft System - Engine No Crank/No Start Condition
NUMBER: 08-007-08 REV. A
GROUP: Electrical
DATE: July 04,2008
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 08-007-08, DATED MARCH 04, 2008. THIS IS A COMPLETE REVISION
AND NO ASTERISKS HAVE BEEN USED TO HIGHLIGHT REVISIONS.
DO NOT ORDER PART NUMBER 05026070AP UNTIL JULY 21, 2008. ALL OTHER PART NUMBERS ARE AVAILABLE NOW.
SUBJECT:
No Engine Crank Or No Engine Start Due To Electronic Lockup Of The WCM / SKREEM
OVERVIEW:
This bulletin involves the replacement of the Wireless Control Module (WCM), and if equipped, the replacement of the Electric Steering Column Lock
(ELV). The WCM is also referred to as the Sentry Key Remote Entry Module (SKREEM).
MODELS:
2007 - 2008
(DR/DH/D1/DC/DM)
Ram Truck (1500/2500/3500/4500/5500)
2007 - 2008
(JK)
Wrangler
2007 - 2008
(J1)
Sebring (China)
2007 - 2008
(JS)
Avenger/Sebring
2007 - 2008
(KA)
Nitro
2008
(KK)
Liberty/Cherokee
2007 - 2008
(MK)
Compass/Patriot
2007 - 2008
(PM)
Caliber
2006 - 2008
(PT)
Chrysler PT Cruiser
NOTE:
This bulletin applies to vehicles built on or before May 05, 2008 (MDH 0505XX).
SYMPTOM/CONDITION:
The customer will experience a no engine crank AND a no engine start condition. Also, the remote keyless entry (RKE) system will not operate. This
condition may be due to an electrostatic discharge (ESD) from the ignition key into the Wireless Control Module (WCM), causing the WCM to
electronically lockup. This condition may occur more frequently in dry and/or cold weather conditions where a sufficient electrostatic charge is more
easily produced. This condition is corrected by the replacement of the WCM.
DIAGNOSIS:
1.
With the condition present (i.e. the vehicle in the no crank / no start condition), connect the StarSCAN(R) scan tool to the vehicle.
2.
Turn the ignition switch to the "ON position, and power up the StarSCAN(R).
3.
If the WCM is electronically locked up, the StarSCAN(R) will display the WCM as being "off bus".
4.
If the no crank / no start condition is present, and the WCM is "off bus", then reset the WCM by temporarily removing the IOD fuse (with the key
out of the ignition switch), wait for 10 seconds and then reinstall the IOD fuse.
5.
With the IOD fuse reset having been performed, verify that the vehicle will now crank, start, and run.
6.
If the condition is temporarily corrected by performing the above steps, and if the part number of the WCM is earlier than the part number of the
WCM listed in the part reference table in the Service Bulletin Parts Required Section below, then perform the Repair Procedure.
