Column Shifter Components
When the vehicle is equipped with the transmission gear shift mounted
on the steering column, the auto trans shift lock control is comprised of
the following components:
| • | The auto trans shift lock control actuator within the steering
column used to lock the gear shift lever. |
| • | The brake-pedal mounted stoplamp/auto trans shift lock control
switch. This switch is used to enable/disable the shift lock control actuator. |
| • | The Park Relay located in the rear fuse block. |
| • | The control circuitry which establishes the conditions for operation
of the auto trans shift lock control system. |
Column Shifter Operation
The auto trans shift lock control is a safety circuit that prevents
the vehicle from being shifted out of Park when the ignition is ON but the
brakes are not applied. To accomplish this, the steering column is equipped
with an auto trans shift lock actuator. This actuator, when energized, physically
blocks the gear shift lever from moving out of Park when the ignition is
ON, until the brake pedal is pressed. When the brake pedal is pressed, the
shift actuator is de-energized, allowing the gear shifter to be moved out
of Park.
Console Shifter Components (DTS)
When the vehicle is equipped with the transmission gear shift mounted
in the floor console, the auto trans shift lock control is comprised of the
following components:
| • | An auto trans shift lock control actuator assembly (with internal
relay) mounted in the floor console and used to lock the gear shift lever. |
| • | The brake-pedal mounted stoplamp/auto trans shift lock control
switch. This switch is used to enable/disable the shift lock control actuator. |
| • | The Park Lock Relay located in the rear fuse block. |
| • | The control circuitry which establishes the conditions for operation
of the auto trans shift lock control system. |
In addition, the floor mounted console shifter also uses the Ignition
3 Relay located in the rear fuse block to control the auto trans shift lock
operation.
Console Shifter Operation (DTS)
The auto trans shift lock control system for vehicles with the console
shifter acts to perform the same function as the one for the column shifter
does. It too is a safety circuit that prevents the vehicle from being shifted
out of PARK when the ignition is ON and the brakes are not applied. However,
its' actuator accomplishes this in a manner that is the reverse of the column
shifter.This actuator, is denergized to physically block the gear shift lever
from moving out of PARK when the ignition is ON and the brakes are not applied.
When the brake pedal is pressed, the shift actuator is energized, allowing
the gear shifter to be moved. The way it does this is discussed in greater
detail in the auto trans shift lock control circuit description.
Reverse Lockout Control System (DTS)
When the vehicle is equipped with the transmission gear shifter mounted
in the floor console, it has a reverse lockout control system as an additional
safety feature. The reverse lockout control system is comprised of the following
components:.
| • | The Reverse Lockout Actuator mounted on the shifter assembly within
the floor console. |
| • | The Reverse Lockout Relay located in the rear fuse block. |
Reverse Lockout Control System Operation (DTS)
The reverse lock out actuators' job is to prevent the console gear shifter
from being accidently bumped into Reverse from the Drive, Drive 1, Drive 2,
Drive 3, or Neutral transmission positions when the vehicle is traveling
at over 5 mph for 15 seconds or longer and the ignition is ON.
