Sensors and Switches
WARNING: This page is about a different variant/trim than selected.
The PCM controls the electronic functions of this transmission. The PCM receives input signals from engine and transmission sensors and uses these inputs to control line pressure, shift time, TCC and shift solenoids.
| Item | Description |
|---|---|
| TFT Sensor | This sensor is located in the transmission solenoid body. It is a temperature-sensitive device called a thermistor. The resistance value of the TFT sensor will vary with temperature change. The PCM monitors the voltage across the TFT sensor to determine the temperature of the transmission fluid. The PCM uses this initial signal to determine whether a cold start shift schedule is necessary. The cold start shift schedule allows delayed shifts when the transmission fluid is cold to help warm the transmission fluid. The PCM also inhibits TCC operation at low transmission fluid temperatures and adjusts line pressure for temperature. |
| TR Sensor | The TR sensor has a 6-pin electrical connector. The TR sensor is located on the inside of the transmission at the manual control lever. The TR sensor sends a signal to the PCM to start the vehicle in PARK and NEUTRAL. The TR sensor opens/ closes a set of 4 switches that are monitored by the PCM to determine the position of the manual control lever. |
| TSS Sensor | The TSS sensor is a Hall-effect type sensor that provides a TSS signal to the PCM. The TSS signal changes in frequency as the rotating speed of the trigger wheel, part of the direct clutch cylinder, varies. The TSS information is compared to engine rpm to determine TSS performance. The TSS is also compared to the OSS to determine shift quality and clutch performance. |
| OSS Sensor | The OSS sensor is a Hall-effect type sensor that provides an OSS signal to the PCM. The OSS signal changes in frequency as the rotating speed of the final drive input gear varies. The OSS is used for shift scheduling. The OSS is also compared to the TSS to determine shift quality and clutch performance. |
System Diagram
Hydraulic Circuit Legend
Hydraulic Circuit Identification Chart
| Circuit Name | Description |
|---|---|
| CB1234 | Regulated pressure from the forward (1, 2, 3, 4) clutch regulator valve to the forward clutch. |
| CB1234 FDBK | CB1234 pressure from the CB1234 boost valve supplied to the CB1234 clutch regulator valve to oppose movement of the valve from SSA SIG pressure during forward (1, 2, 3, 4) clutch application. |
| CB1234 SUP | CB26FD/CB1234FD pressure supplied to the CB1234 regulator valve downstream of the CB26FD/CB1234FD check ball. |
| CB26 | Regulated pressure supplied to the intermediate (2, 6) clutch in 2nd and 6th gears. |
| CB26FD/CB1234FD | DRIVE 2 or DRIVE B pressure directed to the CB26 and CB1234 regulator valves by the DRIVE 2/DRIVE B shuttle ball. |
| C35R | Regulated C35R SUPPLY pressure from the direct (3, 5, R) regulator valve that supplies the direct (3, 5, R) clutch. |
| C35R FDBK | C35R pressure from the C35R boost valve supplied to the C35R clutch regulator valve to oppose movement of the valve from SSB SIG pressure during direct (3, 5, R) clutch application. |
| C35R SUPPLY | DRIVE 2 or REV SUPPLY pressure directed to the 3, 5, R clutch regulator valve by the DRIVE 2/REV SUPPLY shuttle ball. |
| C456/C456 SUPPLY | Regulated clutch pressure from the low/reverse/overdrive (4, 5, 6) regulator valve directed to the overdrive (4, 5, 6) clutch in 4th, 5th, and 6th gears. |
| CBLR/C456 FDBK | CBLR/C456 SUPPLY pressure from the CBLR/C456 boost valve supplied to the CBLR/C456 regulator valve to oppose movement of the valve from SSD SIG pressure during low/reverse and overdrive (4, 5, 6) clutch application. |
| CBLR/C456 SUPPLY | Regulated pressure from the low/reverse/overdrive (4, 5, 6) regulator valve to the multiplex shift valve assembly. The multiplex shift valve directs it to the overdrive clutch or the low/reverse clutch, depending on what position it is in. |
| CBLR/CBLR SUPPLY | Regulated pressure from the low/reverse/overdrive (4, 5, 6) regulator valve directed to the low/reverse clutch by the multiplex shift valve in LOW and REVERSE. |
| COMP FEED | Compensator feed pressure applied to the back side of clutches to keep the clutches from centrifugally applying. |
| CONV FD | Pressure from the pressure regulator valve to the torque converter clutch control valve, which supplies the valve to apply and release the torque converter clutch. |
| COOLER FEED | Pressure supplied to the transmission fluid cooler from the torque converter clutch control valve and feeds the LUBE circuit. |
| DECREASE | Pressure from the pressure regulator valve to the pump that raises and lowers the line pressure. |
| DRIVE 1 | Line pressure directed to the multiplex shift valve by the manual valve in DRIVE and LOW. |
| DRIVE 2 | DRIVE 1 pressure from the multiplex shift valve to the torque converter clutch regulator apply valve, DRIVE 2/DRIVE B shuttle ball, DRIVE 2/REV SUPPLY shuttle ball and CBLR/C456 regulator valve. |
| DRIVE B | REV DRIVE B pressure directed to the DRIVE 2/ DRIVE B shuttle ball by the multiplex manual valve. |
| EXH | Fluid exhausted from the valves that drains to the sump area. |
| EXH BF | Fills the forward (1, 2, 3, 4), intermediate (2, 6) and low/reverse/overdrive (4, 5, 6) regulator valves and the multiplex shift and manual valves with fluid (no pressure). |
| LINE | Line pressure from the pump to the manual valve, solenoid regulator valve, fluid temperature sensor, low/reverse/overdrive (4, 5, 6) regulator valve, COMP FEED circuit and EXH BF circuit. |
| LPC | Full or regulated pressure from the LPC solenoid to the pressure regulator valve. |
| REG APPLY | Regulated DRIVE 2 pressure from the torque converter clutch regulator apply valve supplied to the torque converter clutch control valve to apply the torque converter clutch. |
| REV DRIVE B | DRIVE 1 pressure directed to the multiplex manual valve by the multiplex shift valve. |
| REV/REV SUPPLY | Pressure supplied to the multiplex shift valve assembly and the direct (3, 5, R) clutch regulator valve from the manual valve in REVERSE only. |
| SOL FEED | Regulated pressure from the solenoid regulator valve that supplies the shift, TCC and LPC solenoids, multiplex manual valve and the direct (3, 5, R) clutch regulator valve. |
| SSA SIG | Pressure supplied to the forward (1, 2, 3, 4) clutch regulator and boost valves from SSA to direct regulated pressure to the forward clutch in 1st, 2nd, 3rd or 4th gears. |
| SSB SIG | Pressure supplied to the direct (3, 5, R) clutch regulator and boost valves from SSB to direct regulated pressure to the direct clutch in 3rd and 5th gears and REVERSE. |
| SSC SIG | Pressure supplied to the intermediate (2, 6) clutch regulator and boost valves from SSC to direct regulated pressure to the intermediate clutch in 2nd and 6th gears. |
| SSD SIG | Pressure supplied to the low/reverse/overdrive regulator and boost valves from SSD to direct regulated pressure to the multiplex shift valve in LOW or REVERSE position or 4th, 5th and 6th gear. |
| SSE | Full solenoid pressure from SSE to the torque converter clutch regulator valve and multiplex shift valve. |
| TCC APPLY | Pressure supplied to the torque converter from the TCC control valve to apply the torque converter clutch. |
| TCC RELEASE | Pressure supplied to the torque converter from the TCC control valve to release the torque converter clutch. |
| TCC SOL SIG | Full or regulated pressure from the TCC solenoid to the torque converter clutch regulator and control valves. |
| TFT | Line pressure directed to TFT sensor. |