Automatic Transaxle/Transmission External Controls - Column Shift: Notes
System Operation
The selector lever cable transfers the transmission operating mode from the selector lever to the automatic transmission. The indicated position of the selector lever is transferred to the transmission through the steering column mounted selector lever, to the selector lever cable and down to the manual control lever on the transmission.
System Diagram
| Item | Part Number | Description |
|---|---|---|
| 1 | 7A256 | Selector lever |
| 2 | - | Low gear select switch (part of 7A256) |
| 3 | 7210 | Selector mechanism |
| 4 | 7E395 | Selector lever cable |
| 5 | - | Manual control lever |
Range Selection
This transmission has 4 range positions: P, R, N and D.
Park
In the park position:
- there is no power flow through the transmission.
- the parking pawl locks the final drive.
- the engine may be started.
- the ignition key may be removed.
Reverse
In the REVERSE position:
- the vehicle may be operated in a rearward direction, at a reduced gear ratio.
- engine braking will occur.
Neutral
In the NEUTRAL position:
- there is no power flow through the transmission.
- the output shaft is not held and is free to turn.
- the engine may be started.
Drive Position With Low Gear Select Switch
DRIVE is the normal position for most forward driving.
Drive provides:
- automatic shifts -1st through 6th gears.
- apply and release of the Torque Converter Clutch (TCC).
- maximum fuel economy during normal operation.
The low gear select switch is a momentary contact switch located on the selector lever. Pressing the low gear select switch will allow for low (1st gear) operation or cancel low gear operation.
Gear Availability
Range Selection
| Manual Lever Position | Transmission Gear Operation | Description |
|---|---|---|
| D Low Gear Select Switch | 1±2±3±4±5-6 | 1st through 5th gears are available. Transmission shifts to the 5th gear if the low gear select button is pressed when the transmission is in 6th gear. Transmission provides engine braking. low gear is activated. |
Brake Shift Interlock
Brake Shift Interlock Operation
When the ignition switch is in RUN/START, the solenoid inhibits the selector lever movement (from the PARK position) if the brake pedal is not pressed.
The BSIA inhibits the selector lever movement from the PARK position by mechanically blocking the detent pawl of the selector lever mechanism. When the brake pedal is applied with the ignition key in the RUN/START position and the transmission in PARK, the BSIA is energized by the BCM-B, this allows the selector lever to be moved out of the PARK position.
Brake Shift Interlock
| Inputs to BCM-B | Outputs from BCM-B |
|---|---|
| Fuse(s) 18 (10A) BPP switch Ignition switch position (RUN/START) |
BSIA |
Proper Operation Requirements
Three requirements for the selector lever to be moved from the PARK position are:
- Ignition switch in the RUN/START position
- TR sensor in the PARK position
- BPP switch closed (brakes applied - brake lamps on)