TCM INSPECTION [FS5A-EL]

TCM INSPECTION [FS5A-EL]SM2445487

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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.Disconnect the negative battery cable.

2.Remove the TCM.(See TCM REMOVAL/INSTALLATION [FS5A-EL].)

3.Connect the TCM connector.

4.Connect the negative battery cable.

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

6.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)

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Terminal	Connected to	Test Condition	Voltage (V)	Inspection Item
1A	Shift solenoid A	(See Shift solenoid A.)		• Shift solenoid A (See SOLENOID VALVE INSPECTION [FS5A-EL].) • Related harness
1B	Shift solenoid B	(See Shift solenoid B.)		• Shift solenoid B (See SOLENOID VALVE INSPECTION [FS5A-EL].) • Related harness
1C	Shift solenoid C	(See Shift solenoid C.)		• Shift solenoid C (See SOLENOID VALVE INSPECTION [FS5A-EL].) • Related harness
1D	Pressure control solenoid B	(See Pressure control solenoid B.)		• Pressure control solenoid B (See SOLENOID VALVE INSPECTION [FS5A-EL].) • Related harness
1E	Pressure control solenoid A (+)	(See Pressure control solenoid A (+).)		• Pressure control solenoid A (See SOLENOID VALVE INSPECTION [FS5A-EL].) • Related harness
1F	Shift solenoid D	D range 1GR	Below 1.0	• Shift solenoid D (See SOLENOID VALVE INSPECTION [FS5A-EL].) • Related harness
		D range 2GR	Below 1.0
		D range 3GR	Below 1.0
		D range 4GR	B+
		D range 5GR	B+
1G	Pressure control solenoid A (-)	(See Pressure control solenoid A (-).)		• Pressure control solenoid A (See SOLENOID VALVE INSPECTION [FS5A-EL].) • Related harness
1H	Shift solenoid E	TCC released	Below 1.0	• Shift solenoid E (See SOLENOID VALVE INSPECTION [FS5A-EL].) • Related harness
1H	Shift solenoid E	TCC engaged	B+
1I	AT main relay	Ignition switch off	Below 1.0	• AT main relay (See RELAY INSPECTION [L5].) • Related harness
1I	AT main relay	Ignition switch ON position	B+
1J	Shift solenoid F	D range 1GR	B+	• Shift solenoid F (See SOLENOID VALVE INSPECTION [FS5A-EL].) • Related harness
		D range 2GR	B+
		D range 3GR	B+
		D range 4GR	B+
		D range 5GR	Below 1.0
1K	Battery	Under any condition	B+	• Battery (See BATTERY INSPECTION [L5].) • Related harness
1L	—	—	—	—
1M	AT main relay	Ignition switch off	Below 1.0	• AT main relay (See RELAY INSPECTION [L5].) • Related harness
1M	AT main relay	Ignition switch ON position	B+
1N	—	—	—	—
1O	GND	Under any condition	Below 1.0	• Related harness
1P	GND	Under any condition	Below 1.0	• Related harness
2A	—	—	—	—
2B	M range switch	M range	Below 1.0	• M range switch (See SELECTOR LEVER COMPONENT INSPECTION.) • Related harness
2B	M range switch	Except M range	B+
2C	—	—	—	—
2D	Up switch	Selector lever up-shift position	Below 1.0	• Up switch (See SELECTOR LEVER COMPONENT INSPECTION.) • Related harness
2D	Up switch	Except selector lever up-shift position	B+
2E	—	—	—	—
2F	Down switch	Selector lever down-shift position	Below 1.0	• Down switch (See SELECTOR LEVER COMPONENT INSPECTION.) • Related harness
2F	Down switch	Except selector lever down-shift position	B+
2G	—	—	—	—
2H	TR switch	P position	4.3—4.8	• TR switch (See TRANSAXLE RANGE (TR) SWITCH INSPECTION [FS5A-EL].) • Related harness
		R position	3.8—4.2
		N position	3.0—3.5
		D range	2.2—2.7
		M range	2.2—2.7
2I	Input/turbine speed sensor (+)	(See Input/turbine speed sensor.)		• Input/turbine speed sensor (See INPUT/TURBINE SPEED SENSOR INSPECTION [FS5A-EL].) • Related harness
2J	Oil pressure switch	1GR	Below 1.0	• Oil pressure switch (See OIL PRESSURE SWITCH INSPECTION [FS5A-EL].) • Related harness
		2GR	Below 1.0
		3GR	Below 1.0
		4GR	B+
		5GR	B+
2K	Input/turbine speed sensor (-)	(See Input/turbine speed sensor.)		• Input/turbine speed sensor (See INPUT/TURBINE SPEED SENSOR INSPECTION [FS5A-EL].) • Related harness
2L	Intermediate sensor	(See Intermediate sensor.)		• Intermediate sensor (See INTERMEDIATE SENSOR INSPECTION [FS5A-EL].) • Related harness
2M	TFT sensor	ATF temperature 20 °C {68 °F}	Approx.3.3	• TFT sensor (See TRANSAXLE FLUID TEMPERATURE (TFT) SENSOR INSPECTION [FS5A-EL].) • Related harness
2M	TFT sensor	ATF temperature 65 °C {149 °F}	Approx.1.3
2N	—	—	—	—
2O	TR switch, TFT sensor	Under any condition	Below 1.0	• Related harness
2P	VSS	(See VSS.)		• VSS (See VEHICLE SPEED SENSOR (VSS) INSPECTION [FS5A-EL].) • Related harness
2Q	—	—	—	—
2R	AT main relay	Ignition switch off	Below 1.0	• AT main relay (See RELAY INSPECTION [L5].) • Related harness
2R	AT main relay	Ignition switch ON position	B+
2S	—	—	—	—
2T	—	—	—	—
2U	—	—	—	—
2V	—	—	—	—
2W	CAN module	Because this terminal is for CAN, no valid determination of terminal voltage is possible.
2X	CAN module	Because this terminal is for CAN, no valid determination of terminal voltage is possible.

Input/Output Wave From (Reference)

Shift solenoid A

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• TCM terminals 1A (+)—body GND (-)

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

• Test Condition D range 4GR

Shift solenoid B

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• TCM terminals 1B (+)—body GND (-)

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

• Test Condition D range 1GR

Shift solenoid C

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• TCM terminals 1C (+)—body GND (-)

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

• Test Condition D range 1GR

Pressure control solenoid B

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• TCM terminals 1D (+)—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 (+)

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• TCM terminals 1E (+)—body GND (-)

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

• Test Condition The following conditions are met:

― Ignition switch ON position (engine stop)

― P position

― Accelerator pedal fully depressed

Pressure control solenoid A (-)

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• TCM terminals 1G (+)—body GND (-)

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

• Test Condition The following conditions are met:

― Ignition switch ON position (engine stop)

― P position

― Accelerator pedal fully depressed

Input/turbine speed sensor

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• TCM terminals 2I (+)—2K (-)

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

• Test Condition Idle at P position after warm-up

Intermediate sensor

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• TCM terminals 2L (+)—body GND (-)

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

• Test Condition Vehicle speed at 30 km/h {19 mph}.

VSS

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• TCM terminals 2P (+)—body GND (-)

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

• Test Condition Vehicle speed at 30 km/h {19 mph}.