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ELECTRONIC CONTROL SYSTEM OUTLINE

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2016 – MX-5 – Transmission/Transaxle

ELECTRONIC CONTROL SYSTEM OUTLINE

Outline

  • In the electronic control system, the TCM calculates the control content based on signals from each type of sensor and switch to operate output parts such as each solenoid. In consideration of suppressed shift shock, smooth driving, and improved fuel economy, the TCM performs controls so as to maintain the optimum driving performance in response to the vehicles driving scenario.

Construction

Item

Function

Input

VSS

  • Detects rotation speed of parking gear (output shaft)

Turbine sensor

  • Detects rotation speed of direct and reverse disc clutch case (input shaft)

TR switch

  • Detects select lever position

TFT sensor

  • Detects ATF temperature

CAN

M range switch

  • Receives that selector lever is in M position from instrument cluster

Up switch

  • Receives shift up operation of the selector lever from instrument cluster

Down switch

  • Receives shift down operation of the selector lever from instrument cluster

Steering shift switch

  • Receives the shift up and shift down operations of the steering shift switch from start stop unit

Brake switch

  • Receives brake pedal operation from PCM

Accelerator pedal position signal (accelerator pedal position (APP) sensor)

  • Receives accelerator pedal position signal from PCM

Engine speed signal (crankshaft position (CKP) sensor)

  • Receives engine speed signal from PCM

Engine torque signal (mass air flow (MAF) sensor)

  • Receives engine torque signal from PCM

Engine coolant temperature signal (engine coolant temperature (ECT) sensor)

  • Receives engine coolant temperature signal from PCM

Drive selection signal

  • Receives drive selection-related information signal from PCM

Wheel speed signal (ABS wheel-speed sensor)

  • Receives wheel speed signal from DSC HU/CM

Output

Solenoid (ON/OFF type)

Shift solenoid A

  • Adjusts hydraulic pressure based on the current demand from the TCM according to the vehicle conditions.

Shift solenoid B

  • Adjusts hydraulic pressure based on the current demand from the TCM according to the vehicle conditions.

Shift solenoid C

  • Adjusts hydraulic pressure based on the current demand from the TCM according to the vehicle conditions.

Shift solenoid D

  • Adjusts hydraulic pressure based on the current demand from the TCM according to the vehicle conditions.

Shift solenoid E

  • Adjusts hydraulic pressure based on the current demand from the TCM according to the vehicle conditions.

Solenoid (Linear type)

Line pressure control solenoid

  • Adjusts line pressure based on the current demand from the TCM according to the vehicle conditions.

Torque converter clutch (TCC) control solenoid

  • Adjusts hydraulic pressure in the TCC control circuit based on the current demand from the TCM according to the vehicle conditions

Shift solenoid F

  • Adjusts hydraulic pressure based on the current demand from the TCM according to the vehicle conditions.

Shift solenoid G

  • Adjusts hydraulic pressure based on the current demand from the TCM according to the vehicle conditions.

CAN

AT warning light

  • illuminates when the transmission has malfunction.

Speedometer signal

  • Outputs vehicle speed signal to the speedometer

Torque reduction request signal

  • During shifting, outputs torque reduction request signal to PCM

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