Shift Control
The PCM instantly determines which gear should be selected by various signals sent from sensors and switches, and it actuates shift solenoid valves A, B, C, D, and E to control shifting transmission gear.
Shift solenoid valves are a normally closed type. Shift solenoid valve opens the port of shift solenoid valve pressure leading to shift valves while shift solenoid valve is turned ON by the PCM, and closes the port when shift solenoid valve is OFF.
The combination of driving signals to shift solenoid valves A, B, C, D, and E are shown in the table.
SHIFT SOLENOID VALVE REFERENCE CHART
| Position | Gear Position | Shift Solenoid Valve | ||||
|---|---|---|---|---|---|---|
| A | B | C | D | E | ||
| D and S | Shifting from the N position | OFF | ON | ON | OFF | OFF |
| Stays in 1st | ON | ON | ON | OFF | OFF | |
| Shifting gears between 1st and 2nd | OFF | ON | ON | OFF | OFF | |
| Stays in 2nd | OFF | ON | OFF | ON | OFF or ON | |
| Shifting gears between 2nd and 3rd | OFF | ON | ON | ON | OFF or ON | |
| Stays in 3rd | OFF | OFF | ON | OFF | OFF or ON | |
| Shifting gears between 3rd and 4th | OFF | OFF | OFF | OFF | OFF or ON | |
| Stays in 4th | ON | OFF | OFF | OFF | OFF or ON | |
| Shifting gears between 4th and 5th | ON | OFF | OFF | ON | OFF or ON | |
| Stays in 5th | ON | OFF | ON | ON | OFF or ON | |
| N | Neutral | OFF | ON | ON | OFF | OFF |
| R | Shifting from the P and N positions | OFF | ON | OFF | OFF | ON |
| Stays in reverse | ON | ON | OFF | OFF | ON | |
| Reverse inhibit control | ON | ON | OFF | OFF | OFF | |
| P | Park | OFF | ON | OFF | OFF | ON |