![]() Because of the nature of this problem, it is extremely difficult to diagnose this condition. This in turn may signal the Central Timer Module (CTM) to activate the power door locks. Vehicles that demonstrate this condition may have water weeping into the door/liftgate lock cylinder switches causing the switch to intermittently short across the internal circuit. The condition may occur more frequently in damp conditions such as driving the vehicle in the rain or taking the vehicle through a car wash. The door locks will intermittently lock and/or unlock without any activation of the power door lock switch or a clicking sound may be heard coming from the power door locks (repeated locking or repeated unlocking). NOTE :THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH VEHICLE THEFT SECURITY SYSTEM (SALES CODE LSA). OVERVIEW: This bulletin involves installing new door/liftgate lock cylinder switches. ![]() THE REVISION ADDS 20 VEHICLES AND REVISES THE PARTS TABLE.SUBJECT: Intermittent Locking/Unlocking Of Doors Without Activating The Power Door Lock Switch ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS**. 15, 2000, WHICH SHOULD BE REMOVED FROM YOUR FILES. THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 08-041-00, DATED DEC. ![]() Normally the alternator is moved when replacing the thermostat on the 5.9, make sure there is no wiring pinched around the alternator. This will at least give us a place to start. If you are still in the town that did the thermostat work see if you can at least get them to pull codes and see if any speed control trouble codes are set. Have you driven the vehicle since the cruise light went out? It needs to be in drive to operate. It sounds like you checked most of the possibilities as far as basics. Did you make sure the servo is still connected to the throttle? Is the cable in good condition, make sure its not kinked or damaged. The PCM sees a momentary voltage drop when a function is selected a determines if criteria is correct for the requested function.Ĭhanging the 5.9 thermostat is pretty invasive cxompared to a 4.7. The switchs are MUX switches which means the PCM sends a 5 volt reference through the switch and each switch setting has a different resistance. My Grand Cherokee did the same thing a year later and I let it run its course.The servo has 3 solenoids and a vacuum chamber, the PCM controls the solenoids according to vehicle operating conditions and switch inputs. Pulling fuses, battery cables, etc will only slow it down, so don't do that. There is a subroutine after a fuse pull, battery disconnect or software update that reads the CAN BUS files and then reconfigures the system to reflect the options installed on your car. Two hours later when I went out the system rebooted. I freaked out and pulled fuses, battery etc. ![]() My system booted to a blue Chrysler system and I had no control over my climate control, no Sirius, no Nav and no back up camera. I had this happen to me because of bad timing of a software update in 2017 on my Challenger GT. It also means features like lane keep, blind spot monitoring, etc. It defaults to the base configuration, which is a car with AM/FM radio and no nav, no Sirius, no back up camera and usually a different brand vehicle. It erases everything in the system that is programmed regarding what options and make your vehicle are. When you disconnect the battery the system does the same thing it does when an over the air update is pushed to the system and the CAN BUS communication system files are overwritten.
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