TCM INSPECTION [FS5A-EL]

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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)

Note

•  Use the ground of terminal 1O and 1P of the TCM when measuring terminal voltage, as an error may occur when connecting the negative circuit tester to ground.

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Terminal	Signal	Connected to	Test condition		Voltage (V)	Action
1A	Shift solenoid A control	Shift solenoid A	•  Inspect using the wave profile. (See Inspection Using an Oscilloscope (Reference).)			•  Inspect shift solenoid A (See SOLENOID VALVE INSPECTION (PRIMARY CONTROL VALVE BODY) [FS5A-EL].) •  Inspect related harness
1B	Shift solenoid B control	Shift solenoid B	•  Inspect using the wave profile. (See Inspection Using an Oscilloscope (Reference).)			•  Inspect shift solenoid B (See SOLENOID VALVE INSPECTION (PRIMARY CONTROL VALVE BODY) [FS5A-EL].) •  Inspect related harness
1C	Shift solenoid C control	Shift solenoid C	•  Inspect using the wave profile. (See Inspection Using an Oscilloscope (Reference).)			•  Inspect shift solenoid C (See SOLENOID VALVE INSPECTION (PRIMARY CONTROL VALVE BODY) [FS5A-EL].) •  Inspect related harness
1D	Pressure control solenoid B	Pressure control solenoid B	•  Inspect using the wave profile. (See Inspection Using an Oscilloscope (Reference).)			•  Inspect pressure control solenoid B (See SOLENOID VALVE INSPECTION (SECONDARY CONTROL VALVE BODY) [FS5A-EL].) •  Inspect related harness
1E	Pressure control solenoid A (+)	Pressure control solenoid A	•  Inspect using the wave profile. (See Inspection Using an Oscilloscope (Reference).)			•  Inspect pressure control solenoid A (See SOLENOID VALVE INSPECTION (PRIMARY CONTROL VALVE BODY) [FS5A-EL].) •  Inspect related harness
1F	Shift solenoid D control	Shift solenoid D	Selector lever is at P, N, D (2GR, 4GR, 5GR), M (1GR) position		B+	•  Inspect shift solenoid D (See SOLENOID VALVE INSPECTION (PRIMARY CONTROL VALVE BODY) [FS5A-EL].) •  Inspect related harness
			Other		Below 1.0
1G	Pressure control solenoid A (–)	Pressure control solenoid A	•  Inspect using the wave profile. (See Inspection Using an Oscilloscope (Reference).)			•  Inspect pressure control solenoid A (See SOLENOID VALVE INSPECTION (PRIMARY CONTROL VALVE BODY) [FS5A-EL].) •  Inspect related harness
1H	Shift solenoid E control	Shift solenoid E	Detects TCC operating		B+	•  Inspect shift solenoid E (See SOLENOID VALVE INSPECTION (PRIMARY CONTROL VALVE BODY) [FS5A-EL].) •  Inspect related harness
			Other		Below 1.0
1I	—	—	—		—	—
1J	Shift solenoid F control	Shift solenoid F	1GR, 2GR, 3GR, 4GR		B+	•  Inspect shift solenoid F (See SOLENOID VALVE INSPECTION (SECONDARY CONTROL VALVE BODY) [FS5A-EL].) •  Inspect related harness
			5GR		Below 1.0
1K	Back-up power supply	Battery (positive terminal)	Under any condition		B+	•  Inspect battery (See BATTERY INSPECTION [L8, LF, L5].) •  Inspect related harness
1L	Vehicle speed output	BCM	•  Inspect using the wave profile. (See Inspection Using an Oscilloscope (Reference).)			•  Inspect VSS (See VEHICLE SPEED SENSOR (VSS) INSPECTION [FS5A-EL].) •  Inspect related harness
1M	B+	AT Main relay	Switch the ignition to off		Below 1.0	•  Inspect AT Main relay (See RELAY INSPECTION.) •  Inspect related harness
			Switch the ignition to ON		B+
1N	B+	AT Main relay	Switch the ignition to off		Below 1.0	•  Inspect AT Main relay (See RELAY INSPECTION.) •  Inspect related harness
			Switch the ignition to ON		B+
1O	GND	Body GND	Under any condition		Below 1.0	•  Inspect related harness
1P	GND	Body GND	Under any condition		Below 1.0	•  Inspect related harness
2A	—	—	—		—	—
2B	M range	M range switch	Switch the ignition to ON	M range position	Below 1.0	•  Inspect M range switch (See SELECTOR LEVER COMPONENT INSPECTION.) •  Inspect related harness
				Other	B+
2C	—	—	—		—	—
2D	Manual up	Up switch	Switch the ignition to ON	Detects up-shift operation of selector lever in M range	Below 1.0	•  Inspect up switch (See SELECTOR LEVER COMPONENT INSPECTION.) •  Inspect related harness
				Other	B+
2E	—	—	—		—	—
2F	Manual down	Down switch	Switch the ignition to ON	Detects down-shift operation of selector lever in M range	Below 1.0	•  Inspect down switch (See SELECTOR LEVER COMPONENT INSPECTION.) •  Inspect related harness
				Other	B+
2G	—	—	—		—	—
2H	Selector lever position	TR switch (terminal C)	Switch the ignition to ON	P position	Approx. 4.6	•  Inspect TR switch (See TRANSAXLE RANGE (TR) SWITCH INSPECTION [FS5A-EL].) •  Inspect related harness
				R position	Approx. 3.9
				N position	Approx. 3.2
				D range M range	Approx. 2.5
2I	Input/turbine speed sensor (+)	Input/turbine speed sensor	•  Inspect using the wave profile. (See Inspection Using an Oscilloscope (Reference).)			•  Inspect input/turbine speed sensor (See INPUT/TURBINE SPEED SENSOR INSPECTION [FS5A-EL].) •  Inspect related harness
2J	Oil pressure	Oil pressure switch	Switch the ignition to ON	Detects forward clutch pressure	Below 1.0	•  Inspect oil pressure switch (See OIL PRESSURE SWITCH INSPECTION [FS5A-EL].) •  Inspect related harness
				Other	B+
2K	Input/turbine speed sensor (–)	Input/turbine speed sensor	•  Inspect using the wave profile. (See Inspection Using an Oscilloscope (Reference).)			•  Inspect input/turbine speed sensor (See INPUT/TURBINE SPEED SENSOR INSPECTION [FS5A-EL].) •  Inspect related harness
2L	Secondary gear rotating speed	Intermediate sensor	•  Inspect using the wave profile. (See Inspection Using an Oscilloscope (Reference).)			•  Inspect intermediate sensor (See INTERMEDIATE SENSOR INSPECTION [FS5A-EL].) •  Inspect related harness
2M	ATF temperature	TFT sensor	Switch the ignition to ON	TFT 20 °C {68 °F}	Approx. 3.3	•  Inspect TFT sensor (See TRANSAXLE FLUID TEMPERATURE (TFT) SENSOR INSPECTION [FS5A-EL].) •  Inspect related harness
				TFT 40 °C {104 °F}	Approx. 2.4
				TFT 60 °C {140 °F}	Approx. 1.5
2N	Sensor GND	Steering shift switch	Under any condition		Below 1.0	•  Inspect related harness
2O	Sensor GND	TFT sensor, TR switch	Under any condition		Below 1.0	•  Inspect related harness
2P	Vehicle speed	VSS	•  Inspect using the wave profile. (See Inspection Using an Oscilloscope (Reference).)			•  Inspect VSS (See VEHICLE SPEED SENSOR (VSS) INSPECTION [FS5A-EL].) •  Inspect related harness
2Q	Up-shift or down-shift request	Steering shift switch	Switch the ignition to ON	Up switch and down switch released	Approx. 5.0	•  Inspect steering shift switch (See STEERING SHIFT SWITCH INSPECTION.) •  Inspect related harness
				Down switch depressed	Approx. 2.8
				Up switch depressed	Approx. 2.2
2R	AT Main relay control	AT Main relay	Switch the ignition to off		B+	•  Inspect AT main relay (See RELAY INSPECTION.) •  Inspect related harness
			Switch the ignition to ON		Below 1.0
2S	—	—	—		—	—
2T	—	—	—		—	—
2U	—	—	—		—	—
2V	—	—	—		—	—
2W	CAN_H	Other modules	Because this terminal is for CAN, adequate determination by terminal voltage is not possible.			—
2X	CAN_L	Other modules	Because this terminal is for CAN, adequate determination by terminal voltage is not possible.			—

Inspection Using an Oscilloscope (Reference)

Secondary gear rotating speed signal

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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 {20 mph}

VSS signal (input)

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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 {20 mph}

Vehicle speed signal (output)

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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

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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

(–)

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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)

(+)

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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

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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

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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

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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

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TCM terminals

•  1C (+)—1P (–)

Oscilloscope setting

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

Vehicle condition

•  1GR or 2GR