Part 3 of 3
POWER LOCK MOTORModels equipped with the optional power lock system have a power operated locking mechanism located within each door. The lock mechanisms are actuated by a reversible electric power lock motor. This motor is integral to the door latch unit within each door. A single short pigtail wire with a molded plastic connector insulator connects each lock motor to the vehicle electrical system through a take out and connector of the wire harness within each door.
The power lock motors cannot be adjusted or repaired and, if faulty or damaged, the entire door latch unit must be replaced.
The driver side front door power lock motor is controlled by a unique driver unlock relay output of the Central Timer Module (CTM), while the remaining power lock motors are all connected in parallel and share common CTM lock and unlock relay outputs. The driver side front door power lock motor also shares the common lock relay output from the CTM. This circuit arrangement makes the Remote Keyless Entry (RKE) system driver door unlock only feature option for quad cab models possible. A positive and negative battery connection to the two power lock motor terminals will cause the power lock motor plunger to move in one direction. Reversing the current through these same two connections will cause the power lock motor plunger to move in the opposite direction. The power lock motors and circuits can be tested using conventional diagnostic tools and methods.
POWER LOCK SWITCH
The power lock system can be controlled by a two-way, momentary, resistor multiplexed, single gang switch on a power lock and window switch bezel located near the forward end of the armrest on the passenger side front door trim panel. The power lock switch on the driver side front door trim panel is integral to the driver door module. (Refer to POWER LOCKS/DRIVER DOOR MODULE - DESCRIPTION). The power lock switch is secured by integral latch tabs in a molded plastic receptacle on the back side of the power window and lock switch bezel so that only the switch paddle is visible where it protrudes through the bezel. The power window and lock switch bezel is secured by small metal snap clips within an opening near the forward end of the arm rest in the passenger side front door trim panel so that the switches can be serviced without removing the front door trim panel. An integral connector receptacle on the back of the switch connects it to the vehicle electrical system through a take out and connector of the right front door wire harness. The power lock switch has a green Light-Emitting Diode (LED) located in the switch paddle to improve switch visibility in dark ambient lighting conditions. The power lock switch cannot be adjusted or repaired and, if faulty or damaged, the switch unit must be replaced.
The two-way, momentary, power lock switch on the passenger side front door is connected in series between ground and the passenger door switch mux input of the Central Timer Module (CTM). The power lock switch on the driver side front door trim panel is integral to the driver door module. (Refer to POWER LOCKS/DRIVER DOOR MODULE - OPERATION). Each power lock switch position Lock, Unlock, and Neutral provides a different resistance value to the CTM input which allows the CTM to sense the switch position. Based upon the power lock switch inputs, the CTM controls the battery and ground feed outputs to the power lock motors to lock or unlock the door and liftgate latches. The Light-Emitting Diode (LED) in the paddle of the passenger door power lock switch is connected to battery current through a fuse in the Junction Block (JB) on a fused ignition switch output (run) circuit; therefore, the switch will only be illuminated when the ignition switch is in the ON position. The power lock switch can be diagnosed using conventional diagnostic tools and methods.
REMOTE KEYLESS ENTRY TRANSMITTER
The Remote Keyless Entry (RKE) system Radio Frequency (RF) transmitter is equipped with three buttons, labeled Lock, Unlock, and Panic. It is also equipped with a key ring and is designed to serve as a key fob. The operating range of the transmitter radio signal is up to 7 meters (23 feet) from the RKE receiver. The RKE receiver is integral to the Central Timer Module (CTM) in this vehicle.
Each RKE transmitter has a different vehicle access code, which must be programmed into the memory of the RKE receiver in the vehicle in order to operate the RKE system. The RKE receiver can retain the access codes for up to four transmitters in its memory. (Refer to POWER LOCKS/REMOTE KEYLESS ENTRY TRANSMITTER - STANDARD PROCEDURE - RKE TRANSMITTER PROGRAMMING).
The RKE transmitter operates on two Duracell DL2016, Panasonic CR2016 (or equivalent) batteries. Typical battery life is from one to two years. The RKE transmitter cannot be repaired and, if faulty or damaged, it must be replaced.
See the owner's manual in the vehicle glove box for more information on the features, use and operation of the Remote Keyless Entry (RKE) transmitters.