[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