Part 2 of 2
DOOR CYLINDER LOCK SWITCHA door cylinder lock switch is snapped onto the back of the key lock cylinder inside the driver front door. The door cylinder lock switch is a resistor multiplexed switch that is hard wired in series between a body ground and the Central Timer Module (CTM) through the driver front door wire harness. The door cylinder lock switch is driven by the key lock cylinder and contain three internal resistors. One resistor is used for the neutral switch position, one for the Lock position, and one for the Unlock position.
The door cylinder lock switch cannot be adjusted or repaired and, if faulty or damaged, it must be replaced.
The door cylinder lock switch is actuated by the key lock cylinder when the key is inserted in the lock cylinder and turned to the lock or unlock positions. The door cylinder lock switch closes a path to ground through one of three internal resistors for the Central Timer Module (CTM) when the front door key lock cylinder is in the Lock, Unlock, or Neutral positions. The CTM reads the switch status through an internal pull-up, then uses this information as an input for both power lock system and Vehicle Theft Security System (VTSS) operation.
The door cylinder lock switch and circuits can be diagnosed using conventional diagnostic tools and methods.
DRIVER DOOR MODULE
A Driver Door Module (DDM) located on the drivers door trim panel, is used on all models equipped with power locks, power windows, and power mirrors. The DDM can be serviced without removing the front door trim panel. The DDM houses the following switches:
- Power Lock Switch - The DDM includes a two-way momentary, resistor multiplexed switch to control the power lock system.
- Power Mirror Selector Switch - A three-position rocker switch in the DDM selects the right or left power mirror for adjustment, or turns the power mirror system OFF.
- Power Mirror Adjustment Switches - Four momentary arrowhead shaped, directional switches allow the driver to adjust the selected power mirror in the Up, Down, Right, or Left directions.
- Power Window Lockout Switch - A two-way latching, push-button switch in the DDM allows the vehicle operator to lock out the power window switches on each passenger door so that the passenger door power windows may be operated only from the master switches in the DDM.
- Power Window Switches - The DDM houses a two-way momentary power window switch for the driver side front door. This switch also has a second detent in the Down direction and internal circuitry to provide an Auto-Down feature for the driver side front door power window. In addition to the power window switch for its own door, the DDM houses individual master switches for each passenger door power window.
The DDM also incorporates several green Light- Emitting Diodes (LEDs) that illuminate the power lock and power window switch paddles, and the power mirror switch directional buttons. The DDM cannot be adjusted or repaired and, if faulty or damaged, the entire DDM unit must be replaced.
The Driver Door Module (DDM) combines a power lock switch, a driver power window switch with an Auto-down feature, master switches for each passenger door power window, a power window lockout switch, a power mirror selector switch, and four power mirror adjustment switches in a single unit. The switches in the DDM can be diagnosed using conventional diagnostic tools and methods.
Power Lock Switch
The DDM power lock switch circuitry is connected in series between ground and the driver door switch mux input of the Central Timer Module (CTM). 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 input, the CTM controls the battery and ground feed outputs to the individual power lock motors to lock or unlock the door and liftgate latches. The Light-Emitting Diode (LED) in the DDM power lock switch is connected to battery current through the power window circuit breaker in the Junction Block (JB) on a fused ignition switch output (RUN/ACC) circuit so that the switch will be illuminated whenever the ignition switch is in the ON or Accessory positions.
Power Window Switches
The DDM power window switch circuitry is connected to battery current through a circuit breaker in the Junction Block (JB) on a fused ignition switch output (RUN/ACC) circuit so that the power windows will operate whenever the ignition switch is in the ON or Accessory positions. Each two-way momentary master passenger power window switch in the DDM provides battery current and ground to the individual power window switches on each passenger door so that the power window switch controls the battery current and ground feeds to its respective power window motor. The DDM switch for the driver side front door power window is labeled with the text "Auto" and includes an auto-down feature. When this switch is depressed to a second momentary detent position and released, the driver door power window is automatically operated through an internal circuit and relay to its fully lowered position. The Auto-down event is cancelled if the switch paddle is depressed a second time in either the Up or Down direction. When the two position window lockout switch in the DDM is depressed and latched in the lockout position, the battery current feed to each of the individual passenger power window switches is interrupted so that the passenger door power windows can only be operated from the master switches in the DDM. The window lockout switch also controls the battery current feed for the LED in each passenger power window switch so that the switch will not be illuminated when it is locked out.
Power Mirror Switches
The DDM power mirror switch circuitry is connected to battery current through a fuse in the JB on a fused B(+) circuit so that the power mirrors remain operational regardless of the ignition switch position. A rocker type selector switch has three positions, one to select the right mirror, one to select the left mirror, and a neutral OFF position. After the right or left mirror is selected, one of four directional buttons is depressed to move the selected mirror Up, Down, Right or Left. The DDM power mirror switch circuitry controls the battery current and ground feeds to each of the four (two in each mirror head) power mirror motors. The Light-Emitting Diode (LED) in the DDM power mirror switch is connected to battery current through the power window circuit breaker in the Junction Block (JB) on a fused ignition switch output (RUN/ACC) circuit so that the switch directional buttons will be illuminated whenever the ignition switch is in the ON or Accessory positions.
LIFTGATE CYLINDER LOCK SWITCH
The liftgate cylinder lock switch is snapped onto the back of the liftgate key lock cylinder inside the liftgate. The liftgate cylinder lock switch is a resistor multiplexed switch that is hard wired in series between a body ground and the Central Timer Module (CTM) through the liftgate wire harness. The liftgate cylinder lock switch is driven by the key lock cylinder and contains three internal resistors. One resistor is used for the neutral switch position, one for the Lock position and one for the Unlock position.
The liftgate cylinder lock switch cannot be adjusted or repaired and, if faulty or damaged, it must be replaced.
The liftgate cylinder lock switch is actuated by the key lock cylinder when the key is inserted in the lock cylinder and turned to the lock or unlock positions. The liftgate cylinder lock switch closes a path to ground through one of three internal resistors for the Central Timer Module (CTM) when the liftgate key lock cylinder is in the Lock, Unlock, or Neutral positions. The CTM reads the switch status through an internal pull-up, then uses this information as an input for both the power lock system and Vehicle Theft Security System (VTSS) operation.
The liftgate cylinder lock switch and circuits can be diagnosed using conventional diagnostic tools and methods.
POWER LOCK MOTOR
Models equipped with the optional power lock system have a power operated locking mechanism located within each door and the liftgate. The lock mechanisms are actuated by a reversible electric power lock motor. This motor is integral to the door latch unit within each door, but the liftgate lock motor is a separate unit that operates the liftgate latch locking mechanism through a connecting linkage rod. 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 and the liftgate.
The power lock motors cannot be adjusted or repaired and, if faulty or damaged, the entire door latch unit or the liftgate lock motor 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 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.