TCM INSPECTION [FS5A-EL]

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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.  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)

am3uuw00002440

Terminal

Connected to

Test Condition

Voltage (V)

Inspection Item
A
—
—
—
—
B
CAN module
Because this terminal is for CAN, no valid determination of terminal voltage is possible.
C
—
—
—
—
D
—
—
—
—
E
CAN module
Because this terminal is for CAN, no valid determination of terminal voltage is possible.
F
Down switch
Selector lever down-shift position
Below 1.0
•  Down switch
•  Related harness
Except selector lever down-shift position
B+
G
Up switch
Selector lever up-shift position
Below 1.0
•  Up switch
•  Related harness
Except selector lever up-shift position
B+
H
—
—
—
—
I
AT main relay
Ignition switch off
Below 1.0
•  AT main relay
•  Related harness
Ignition switch ON
B+
J
Battery
Under any condition
B+
•  Battery
•  Related harness
K
M range switch
M range
Below 1.0
•  M range switch
•  Related harness
Except M range
B+
L
GND
Under any condition
Below 1.0
•  Related harness
M
GND
Under any condition
Below 1.0
•  Related harness
N
—
—
—
—
O
AT main relay
Ignition switch off
Below 1.0
•  AT main relay
•  Related harness
Ignition switch ON
B+
P
AT main relay
Ignition switch off
Below 1.0
•  AT main relay
•  Related harness
Ignition switch ON
B+
Q
—
—
—
—
R
—
—
—
—
S
Oil pressure switch
1GR
Below 1.0
•  Oil pressure switch
•  Related harness
2GR
Below 1.0
3GR
Below 1.0
4GR
B+
5GR
B+
T
Steering shift switch
Up switch and down switch operated
(Steering shift switch)
Approx. 1.8
•  Steering shift switch
•  Related harness
Up switch operated
(Steering shift switch)
Approx. 2.3
Down switch operated
(Steering shift switch)
Approx. 3.0
Others
Approx. 5.0
U
TR switch
P position
4.3—4.8
•  TR switch
•  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
V
TR switch, TFT sensor
Under any condition
Below 1.0
•  Related harness
W
—
—
—
—
X
Steering shift switch
Under any condition
Below 1.0
•  Related harness
Y
Input/turbine speed sensor (-)
(See Input/turbine speed sensor.)
•  Input/turbine speed sensor
•  Related harness
Z
VSS
(See VSS.)
•  VSS
•  Related harness
AA
TFT sensor
ATF temperature 20 °C {68 °F}
Approx. 3.3
•  TFT sensor
•  Related harness
ATF temperature 65 °C {149 °F}
Approx. 1.3
AB
Input/turbine speed sensor (+)
(See Input/turbine speed sensor.)
•  Input/turbine speed sensor
•  Related harness
AC
Intermediate sensor
(See Intermediate sensor.)
•  Intermediate sensor
•  Related harness
AD
Pressure control solenoid A (+)
(See Pressure control solenoid A (+).)
•  Pressure control solenoid A
•  Related harness
AE
Pressure control solenoid A (-)
(See Pressure control solenoid A (-).)
•  Pressure control solenoid A
•  Related harness
AF
—
—
—
—
AG
Shift solenoid A
(See Shift solenoid A.)
•  Shift solenoid A
•  Related harness
AH
Shift solenoid D
D range 1GR
Below 1.0
•  Shift solenoid D
•  Related harness
D range 2GR
Below 1.0
D range 3GR
Below 1.0
D range 4GR
B+
D range 5GR
B+
AI
Shift solenoid F
D range 1GR
B+
•  Shift solenoid F
•  Related harness
D range 2GR
B+
D range 3GR
B+
D range 4GR
B+
D range 5GR
Below 1.0
AJ
Shift solenoid B
(See Shift solenoid B.)
•  Shift solenoid B
•  Related harness
AK
Shift solenoid E
TCC released
Below 1.0
•  Shift solenoid E
•  Related harness
TCC engaged
B+
AL
Shift solenoid C
(See Shift solenoid C.)
•  Shift solenoid C
•  Related harness
AM
Pressure control solenoid B
(See Pressure control solenoid B.)
•  Pressure control solenoid B
•  Related harness


Inspection Using an Oscilloscope (Reference)


Input/turbine speed sensor

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•  Terminal:
AB (+)—Y (-)
•  Oscilloscope setting:
1 V/DIV (Y), 2 ms/DIV (X), DC range
•  Measurement condition:
Idling in P position after warming up


VSS

aprjjw00003936
•  Terminal:
Z (+)—GND (-)
•  Oscilloscope setting:
1 V/DIV (Y), 2 ms/DIV (X), DC range
•  Measurement condition:
When all of the following conditions are met:
―  Vehicle speed: 30 km/h {19 mph}
―  3GR


Intermediate sensor

aprjjw00003935
•  Terminal:
AC (+)—GND (-)
•  Oscilloscope setting:
1 V/DIV (Y), 200 µs/DIV (X), DC range
•  Measurement condition:
When all of the following conditions are met:
―  Vehicle speed: 30 km/h {19 mph}
―  3GR


Pressure control solenoid A (+)

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•  Terminal:
AD (+)—GND (-)
•  Oscilloscope setting:
5 V/DIV (Y), 1 ms/DIV (X), DC range
•  Measurement condition:
When all of the following conditions are met:
―  Ignition switched ON (engine off)
―  P position
―  Accelerator pedal fully depressed


Pressure control solenoid A (-)

aatjjw00005436
•  Terminal:
AE (+)—GND (-)
•  Oscilloscope setting:
200 mV/DIV (Y), 1 ms/DIV (X), DC range
•  Measurement condition:
When all of the following conditions are met:
―  Ignition switched ON (engine off)
―  P position
―  Accelerator pedal fully depressed


Shift solenoid A

aatjjw00005435
•  Terminal:
AG (+)—GND (-)
•  Oscilloscope setting:
5 V/DIV (Y), 5 ms/DIV (X), DC range
•  Measurement condition:
D range driving in 4GR


Shift solenoid B

aatjjw00005435
•  Terminal:
AJ (+)—GND (-)
•  Oscilloscope setting:
5 V/DIV (Y), 5 ms/DIV (X), DC range
•  Measurement condition:
D range driving in 1GR


Shift solenoid C

aatjjw00005435
•  Terminal:
AL (+)—GND (-)
•  Oscilloscope setting:
5 V/DIV (Y), 5 ms/DIV (X), DC range
•  Measurement condition:
D range driving in 1GR


Pressure control solenoid B

am6zzw00004856
•  Terminal:
AM (+)—GND (-)
•  Oscilloscope setting:
5 V/DIV (Y), 5 ms/DIV (X), DC range
•  Measurement condition:
Shifting from 4GR to 5GR, 5GR to 4GR