Shift Control
- Make
- Rover
- Model
- 600 Electrical Library
- Section
- Automatic transmission operation › Shift Control
Description and operationShift Control · page 1 of 2
Shift Control
The TCM determines the appropriate gear and activates the shift control solenoid valves according to the following table:
| Gear Selector Position | Gear | Solenoid Valve A | Solenoid Valve B |
|---|---|---|---|
| 1 | 1st | ON | OFF |
| 2 | 2nd | ON | ON |
| D4,D3 | 1st | OFF | ON |
| D4,D3 | 2nd | ON | ON |
| D4,D3 | 3rd | ON | OFF |
| D4 | 4th | OFF | OFF |
| R | ON | OFF |
Lock-up Control
The TCM determines whether to turn the lock-up ON or OFF and activates the lock-up control solenoids according to the following table:
| Lock-up Position | Lock-up Solenoid A | Lock-up Solenoid B |
|---|---|---|
| Lock-up OFF | OFF | OFF |
| Lock-up, slight | ON | Duty Operation OFF/ON |
| Lock-up, half | ON | ON |
| Lock-up, full | ON | ON |
| Lock-up, during deceleration | ON | Duty OperationOFF/ON |
Self Diagnosis Function
The TCM has a self diagnosis function. If a fault is detected, the D4 indicator light in the instrument pack will blink.
NOTE: Some engine management problems will also cause the D4 indicator light to blink.
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