Mopar 1FU931X9AC Switch-Engine START/STOP

If the key is hard to turn, the issue may not be the ignition switch or Ignition Lock Cylinder, but could be due to a misaligned transmission shift cable or Brake Transmission Shift Interlock (BTSI) cable. To replace the Ignition Lock Cylinder, disconnect the battery, remove the ignition switch and instrument cluster bezel, insert the key and turn it to ON, depress the retaining pin and remove the cylinder. Ensure the key is in ON position and align the D-shaped lug with the socket before installing the new cylinder. To replace the ignition switch, disconnect the battery, disable the airbag, remove the knee bolster and reinforcement panel, disconnect the electrical connectors and BTSI cable, and remove the switch. The Sentry Key Remote Entry Module (SKREEM) recognizes the key's encrypted RF signal, unlocking the doors and allowing the engine to start. If the key or SKREEM is replaced, reprogramming is required at a dealership.

If the key can barely be turned you may realize that it is not a problem with the ignition switch or ignition lock cylinder but could be a problem with out of adjustment transmission shift cable or the Brake Transmission Shift Interlock (BTSI) cable. Make sure that you get the original ignition lock cylinder for the ignition key because getting a cylinder that does not fit the key will not work. Be sure to carry your ignition key and Vehicle Identification Number (VIN) for the purpose of buying replacement ignition lock cylinder. It is inconvenient to replace an ignition key because it has a transponder - an RF signal encrypted that must be matched to the car's Sentry Key Remote Entry Module. First, you should have to remove the cable which is connected to the negative terminal of the battery. To do this, the ignition switch bezel has to be removed gently and following this, the instrument cluster bezel. To do this you have to insert the ignition key into the ignition lock cylinder and then turn it clockwise to the On position. Insert a small awl or punch in the hole of the retaining pin and apply pressure to unlock the ignition lock cylinder for it to be withdrew from the steering column. Before fitting a new ignition lock cylinder ensure that the car ignition key is kept on the ON position, position the D-shaped lug with the socket while pushing the lock cylinder in until it snaps into position. Removal and installation have similar procedures with slight differences, that is from installation point of view. After that, remove the cable from the negative terminal of the battery, turn off the airbag system, and also, eliminate knee bolster and reinforcement panel. Remove by loosening the lower mounting nut and two front mounting bolts, on the ignition lock cylinder/ignition switch assembly, also remove electrical connectors from the ignition switch and from the SKREEM. Pull the connector of the BTIS, then loosen the screw on the ignition switch and pull the release tabs to take out the ignition switch, and the process of fitting is a reversal of the removal process. On the keyless start button, you have to pry it under the instrument panel and remove the electrical connection wires. SKREEM/Wireless Control Module WCM is a relatively small black plastic unit installed to the left of the ignition switch/ignition lock cylinder housing which is part of the Sentry Key Remote Entry System. Depressing the Unlock button on the ignition key leads to the generation of an RF signal in the transponder encoded by the SKREEM/WCM which unlocks the doors and powers the rest of the modules in the vehicle. To unlock and lock the doors and trigger the security system, a Press of the Lock button is required. The key fobs known as SKREEM/WCM and the ignition key are designed to work with each other and if any of these items is replaced it will have to be reprogrammed at a dealership or an authorized repair shop.

The key lock cylinder is connected to the steering column and for the non-tilt column the ignition switch is on the same column. To verify the switch, it has to be pulled out and by using an ohmmeter or self-powered test light continuity between the two terminals of the switch must be confirmed; if continuity is improper, the switch need to be replaced. For replacement, take off the negative battery cable, insert the key in the lock cylinder and rotate the cylinder to position ACE and finally remove the cover of the steering column. Sometimes the steering column has to be lowered in order to get to the switch. Disconnect the switch electrical connection, take out the bolts, then separate the switch from the actuator rod and then take it down from the steering column. Removing a switch is done vice versa to the installation where there is confirmation that the switch is connected to the actuator rod and all loose ends have been tightened thus fully tightening bolts. In Tilt Column models, the switch is located on the right side of the steering and is fixed with three special security Torx T-20 screws. As a control test, try the switch by pulling it out and using an ohmmeter or self-powered test light on continuity; if the switch is defective, replace it. For replacement, detach the negative battery terminal, remove the cover of the steering column and then remove the tamper proof screws. The switch should be detached on the column, the electric connector must be unplugged and the switch must be taken out. In case the lock cylinder has to be dismantled than turn the key to the LOCK position the retaining pin with the assistance of screwdriver until well concealed. Now turn the key anti-clockwise to the Off position to release the lock cylinder, rotate the key to the locked position, and withdrawing the key, pull out the lock cylinder from the ignition switch assembly. The processes for removing and installing the shifter are the reverse of each other: On the shifter of column shift models must be in Park position and the switch column lock flag must be parallel to electrical connectors. Place the lock cylinder at the Lock location until it is fully seated within the switch; then while holding it in its seated position, insert the key and then rotate it clockwise to the Run position.

Don't confuse this problem with a faulty ignition switch or an ignition lock cylinder; it could be that the transmission shift cable is off the track regarding adjustment. Start by removing the negative cable from the battery and then take off the knee bolster, and upper and lower steering column. Push the brake pedal and turn the ignition lock cylinder by inserting the ignition key to it and shift the lever to the park position. Rotate the ignition key clockwise to the RUN position, insert a small punch, for example, of about flattened part of a standard pen into the hole for the ignition lock cylinder pin, push the pin inwards and, as a result, pull the ignition lock cylinder out of the steering column. Before inserting the ignition lock cylinder, tide the ignition key at the RUN position, thread the ignition lock cylinder into the ignition with its flats seated into the receptacle on the terminal of the lock cylinder bore, and turn it to the right until it locks into the position. As for the ignition switch, however, one has to remove the cable from the negative terminal of the battery and also to deactivate the air bag. The upper and lower steering column covers have to be taken off, then the ignition lock cylinder has to be withdrawn. Remove the screws that connect the clockspring electrical connectors and place the harness to the side. Three various screws have to be undone in order to detach the tilt lever mounting bracket, then: unplug the electrical connector for the ignition switch and, finally, unscrew the mounting screws on the switch. Twist the small locking tab in anti-clockwise direction with respect to the steering column and pull the ignition switch out. For models from 2014 and after equipped with Keyless Ignition Node (KIN) start switch, include the cable(s) from the negative battery terminal(s). On Durango models, the Start/Stop button is not fixed in any way and can be extracted from the instrument panel without removing the whole panel using just a small trim tool. Pull the center instrument trim bezel and again using the plastic trim stick, insert it at the gap where the steering column gap bezel is situated then pry it out until all the clips holding it are disengaged. Tilt the steering column down and pull the bezel and or the panel back as it is situated on the instrument. Take out the start switch bezel screws, then, pull the bezel forward and disconnect the electrical connector of the start switch. Last, take out the KIN start switch mounting screws and pull the module off the bezel, installation procedure is literally done in reverse.