Toyota Corolla automatic transmission diagram
Note: Diagrams may vary depending on Corolla year and model.
Main components:
*Transmission Control Module (TCM)
* Transmission Computer (TC)
* Gear selection solenoids (S1, S2, S3, S4, S5)
* Transmission Input Speed Sensor (ISS)
*Output Speed Sensor (OSS)
* Gear selector position sensor (PRNDL)
* Throttle Position Sensor (TPS)
* Vehicle Speed Sensor (VSS)
* Engine Coolant Temperature (ECT) Sensor
Electrical diagram:
1. Transmission control module (TCM)
* Receives signals from various sensors
* Controls gear selection solenoids
* Calculates gear shift points
2. Transmission computer (TC)
* Interface between TCM and Engine Control Module (ECM)
*Relays shift commands from TCM to ECM
3. Gear selection solenoids (S1-S5)
* Control the flow of transmission fluid inside the transmission
*Used to select appropriate gears
4. Transmission Input Speed Sensor (ISS)
* Monitors transmission input shaft rotation speed
*Used to calculate gear ratio and shift torque
5. Output Speed Sensor (OSS)
* Monitors transmission output shaft rotation speed
*Used to confirm gear selection and prevent clutch slippage
6. Gear selector position sensor (PRNDL)
* Determines the position of the gear selector (P, R, N, D, L)
*Relays this information to the TCM to select appropriate gears
7. Throttle Position Sensor (TPS)
* Monitors throttle position
*Used by the TCM to adjust shift points based on engine load
8. Vehicle Speed Sensor (VSS)
* Tracks vehicle speed
*Used by TCM to calculate gear ratio and shift timing
9. Engine Coolant Temperature (ECT) Sensor
* Monitors engine coolant temperature
*Used by the TCM to adjust shift points based on engine temperature