TCM SIGNAL INPUT/OUTPUT CHART

Control item

Line pressure control

Vehicle speed control

Shift control

Lock up control

Engine brake control

Fail-safe function (⁽³⁾)

Self-diagnostics function

Input

Accelerator pedal position signal (⁽⁵⁾)

Vehicle speed sensor A/T (revolution sensor)

Vehicle speed sensor MTR (⁽¹⁾) (⁽⁵⁾)

Closed throttle position signal (⁽⁵⁾)

X (⁽²⁾)

X (⁽⁴⁾)

Wide open throttle position signal (⁽⁵⁾)

X (⁽⁴⁾)

Turbine revolution sensor 1

Turbine revolution sensor 2 (for 4th speed only)

Engine speed signals (⁽⁵⁾)

Stop lamp switch signal (⁽⁵⁾)

X (⁽⁴⁾)

A/T fluid temperature sensors 1, 2

ASCD or ICC sensor integrated unit

Operation signal (⁽⁵⁾)

Overdrive cancel signal (⁽⁵⁾)

Output

Direct clutch solenoid (ATF pressure switch 5)

Input clutch solenoid (ATF pressure switch 3)

High and low reverse clutch solenoid (ATF pressure switch 6)

Front brake solenoid (ATF pressure switch 1)

Low coast brake solenoid (ATF pressure switch 2)

Line pressure solenoid

TCC solenoid

Self-diagnostics table (⁽⁶⁾)

Starter relay

⁽¹⁾	Spare for vehicle speed sensor. A/T (revolution sensor)

⁽²⁾	Spare for accelerator pedal position signal

⁽³⁾	If these input and output signals are different, the TCM triggers the fail-safe function.

⁽⁴⁾	Used as a condition for starting self-diagnostics; if self-diagnostics are not started, it is judged that there is some kind of error.

⁽⁵⁾	Input by CAN communications.

⁽⁶⁾	Output by CAN communications.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Input/Output Signal of TCM

Use the Manual With the Right Hardware

When to See a Mechanic