Control Module: Testing and Inspection

TCM INSPECTION [FS5A-EL]

NOTE:
- The TCM terminal voltage can vary with conditions when measuring and changes due to age deterioration on the vehicle, causing false diagnosis. Therefore a comprehensive inspection of the input and output systems, and the TCM is necessary to determine where the malfunction occurs.

1. Connect the voltmeter (-) lead to body GND.

2. 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 "Inspection Item" column in the "TCM Terminal Voltage".

TCM Terminal Voltage (Reference)

















Input/Output Wave From (Reference)

Shift solenoid A





TCM terminals
- AG (+)-body GND (-)

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

Test Condition
- The following conditions are met:

- Selector lever position: D position
- Gear position: 4GR

Shift solenoid B





TCM terminals
- AJ (+)-body GND (-)

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

Test Condition
- The following conditions are met:

- Selector lever position: D position
- Gear position: 1GR

Shift solenoid C





TCM terminals
- AL (+)-body GND (-)

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

Test Condition
- The following conditions are met:

- Selector lever position: D position
- Gear position: 1GR

Pressure control solenoid B





TCM terminals
- AM (+)-body GND (-)

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

Test Condition
- Shifting from 4GR to 5GR or from 5GR to 4GR

Pressure control solenoid A (+)





TCM terminals
- AD (+)-body GND (-)

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

Test Condition
- The following conditions are met:

- Switch the ignition to ON (engine off)
- Selector lever position: P position
- Accelerator pedal fully depressed

Pressure control solenoid A (-)





TCM terminals
- AE (+)-body GND (-)

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

Test Condition
- The following conditions are met:

- Switch the ignition to ON (engine off)
- Selector lever position: P position
- Accelerator pedal fully depressed

Input/turbine speed sensor





TCM terminals
- AB (+)-Y (-)

Oscilloscope setting
- 1 V/DIV (Y), 2 ms/DIV (X), DC range

Test Condition
- Idle at P position after warm-up

Intermediate sensor





TCM terminals
- AC (+)-body GND (-)

Oscilloscope setting
- 1 V/DIV (Y), 200 �s/DIV (X), DC range

Test Condition
- The following conditions are met:

- Gear position: 3GR
- Vehicle speed: 30 km/h {19 mph}

VSS





TCM terminals
- Z (+)-body GND (-)

Oscilloscope setting
- 1 V/DIV (Y), 2 ms/DIV (X), DC range

Test Condition
- The following conditions are met:

- Gear position: 3GR
- Vehicle speed: 30 km/h {19 mph}