Toyota A750 Calibration Notes
Pressure Control Tables
% based pressure upshift control tables are used for accumulator control.
Absolute based pressure control tables are used for braking downshifts, N-1, 4-5, and 5-4.
Clutch Numbering
Clutch | Toyota | Applied |
|---|---|---|
1 | C1 | N-1,N-2,N-3,N-4, 5-4 |
2 | C2 | 3-4 |
3 | C3 | 2-3 |
4 | B1 | 3rd gear braking, 4-5, N-5 |
5 | B2 | 2nd gear braking |
6 | B3 | 1-2 |
7 | B4 | 1st gear braking |
Solenoid Numbering, OEM and DTC Names
DTC Solenoid Name | PWM Driver Number | Toyota Solenoid Name | Function |
|---|---|---|---|
Pressure Control Solenoid A | 1 | SLT | Line pressure control |
TCC Pressure Control Solenoid | 2 | SLU | TCC control |
Pressure Control Solenoid B | 3 | SL1 | C1 pressure control, accumulator pressure control, depending on SR |
Pressure Control Solenoid C | 4 | SL2 | Braking clutch pressure control |
Shift Solenoid A | 5 | S1 | Shift valve control |
Shift Solenoid B | 6 | S2 | Shift valve control |
Shift Solenoid C | 7 | SR | Relay valve control. Switches between having SL1 control accumulator pressure and C1 pressure |
Solenoid Pressure to Current Tables
Solenoid Number | Toyota Solenoid Name | Function | Notes |
|---|---|---|---|
1 | SLT | D1,D2 line pressure | This table is used in R as well, but the valve body adds a 4 bar boost |
2 | SLT | D3,D4,D5 line pressure | |
4 | SLU | TCC Pressure | |
5 | SL1 | C1 Clutch Pressure | SL1 when used to control C1 pressure |
6 | SL2 | B1,B2,B4 Clutch Pressure | SL2 when used to control braking clutch pressure. |
Torque Management Output
Pin 16 on the controller is driven to +12 during shifts and other torque management events.