[FS5A-EL]

TCM INSPECTION [FS5A-EL]

Caution: The TCM terminal voltages vary with changes in measuring and vehicle conditions. Always carry out a total inspection of the input and output systems, and the TCM to determine the cause of trouble. Otherwise, a mis-diagnosis could occur.

1. Measure the voltage at each terminal.
^ If any incorrect voltage is detected, inspect the related system(s), wiring harnesses and connector(s) referring to the Action column in the terminal voltage table.

Terminal Voltage Table (Reference) (Part 1):

Terminal Voltage Table (Reference) (Part 2):

Terminal Voltage Table (Reference) (Part 3):

Inspection Using an Oscilloscope (Reference)

Secondary gear rotating speed signal





TCM terminals
^ 2L (+)-1P (-)

Oscilloscope setting
^ 1 V/DIV (Y), 2.5 ms/DIV (X), DC range

Vehicle condition
^ Drive the vehicle at approx. 32 km/h (19.9 mph)

VSS signal (input)





TCM terminals
^ 2P (+)-1P (-)

Oscilloscope setting
^ 1 V/DIV (Y), 2.5 ms/DIV (X), DC range

Vehicle condition
^ Drive the vehicle at approx. 32 km/h [19.9 mph]

Vehicle speed signal (output)





TCM terminals
^ 1L (+)-1P (-)

Oscilloscope setting
^ 1 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition
^ Drive the vehicle at approx. 30 km/h (18.6 mph)

Input/turbine speed sensor signal





TCM terminals
^ 2I (+)-1P (-)

Oscilloscope setting
^ 500 mv/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition
^ Idle after warm up (engine speed approx. 700 rpm, no load, P/S off, A/C off)

Pressure control solenoid A signal (-)





TCM terminals
^ 1G (+)-1P (-)

Oscilloscope setting
^ 200 mV/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition
^ Idle after warm up (engine speed approx. 700 rpm, no load, P/S off, A/C off)

(+)





TCM terminals
^ 1E (+)-1P (-)

Oscilloscope setting
^ 5 V/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition
^ Idle after warm up (engine speed approx. 700 rpm, no load, P/S off, A/C off)

Pressure control solenoid B signal





TCM terminals
^ 1D (+)-1P (-)

Oscilloscope setting
^ 5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition
^ 4GR->5GR, 5GR->4GR

Shift solenoid A control





TCM terminals
^ 1A (+)-1P (-)

Oscilloscope setting
^ 5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition
^ 4GR (D range)

Shift solenoid B control





TCM terminals
^ 1B (+)-1P

Oscilloscope setting
^ 5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition
^ 1GR (D range)

Shift solenoid C control





TCM terminals
^ 1C (+)-1P (-)

Oscilloscope setting
^ 5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition
^ 1GR or 2GR