Solenoid valves
| Pos. | Spare part number | Name |
| 1 | - | 3-way solenoid valve - S1 |
| 2 | - | 3-way solenoid valve - S2 |
| 3 | - | Solenoid valve for line pressure control - SLT |
| 4 | - | Shift Control Solenoid Valve - SLC2 |
| 5 | - | Shift Control Solenoid Valve - SLC1 |
| 6 | - | Solenoid valve for lock control - SLU |
| 7 | - | Shift Control Solenoid Valve - SLC3 |
| 8 | - | Solenoid valve for switching control - SLB1 |
| 9 | - | Valve block |
Shift Control Solenoid Valves - SLC1, SLC2, SLC3, SLB1
The shift control solenoids (SLC1, SLC2, SLC3 and SLB1) are mounted on the front valve body. The solenoids respond to input signals from the TCM and control the hydraulic pressure supplied to the clutches (C1, C2 and C3) and brake B1 to ensure smooth shifting. The TCM uses these solenoids individually or in combination to provide shifting from 1st to 6th gear.
If the solenoid valve fails, the TCM interrupts the current supply to the shift control solenoid valves and, to prevent damage, the transmission goes into emergency mode.
Solenoid valve for line pressure control - SLT
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The line pressure control solenoid (SLT) is mounted on the front valve body. The solenoid is controlled linearly by the TCM, which uses throttle position signals and engine torque information from the Engine Control Module (ECM) to calculate solenoid valve operation parameters. The solenoid controls line pressure supplied to the clutches and brakes to ensure smooth shifting.
If the solenoid valve fails, the TCM will stop supplying current to it. Maximum pressure will be supplied to the clutches and brakes, unless the failure is caused by a stuck solenoid valve, which can cause low pressure in the line.
Solenoid valve for lock control - SLU
The lock-up control solenoid valve is mounted on the front valve body. The solenoid valve is controlled linearly by the TCM, which uses engine speed, throttle opening degree, and transmission speed sensor signals to calculate solenoid valve operation parameters. The solenoid valve controls the degree of lock-up or slippage required by the torque converter lock-up clutch.
If the solenoid valve fails, the TCM stops supplying current to it, which results in the torque converter not locking up.
3-way solenoid valve - S1, S2
The 3-way solenoid valve (S1) is located on the center valve body and the solenoid valve (S2) is located on the front valve body. The solenoids are two-position solenoids controlled by the TCM. The combination of the 2 solenoids is used to either control engine braking in 1st gear or to shift gears.
If a solenoid valve fails, the TCM stops supplying current to both solenoid valves.
Speed sensors
| Pos. | Spare part number | Name |
| 1 | - | Speed sensor (SP) - output shaft speed |
| 2 | - | Reverse pinion gear |
| 3 | - | Clutch drum C2 |
| 4 | - | Speed sensor (NIN) |
The transmission uses two speed sensors (NIN and SP) located in the transmission case. The speed sensor (SP) is located near the reverse pinion gear and reads the gear teeth to generate an output signal indicating the output shaft speed. The speed sensor (NIN) is located near the clutch drum "C" and reads the teeth on the outer circumference of the drum to generate an output signal indicating the input shaft speed. Both speed signals are received by the TCM, which uses the two signals to calculate engine output torque, shift timing, and torque converter lockup.
Transmission Fluid Temperature Sensor
The transmission fluid temperature sensor is located on the internal wiring harness in the transmission. It detects the temperature of the transmission fluid in the hydraulic pressure control circuit and transmits a temperature-related signal to the TCM. The TCM monitors the temperature and ensures smooth gear shifting over a wide temperature range.
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