TCM INSPECTION


BHE051318901W01

Terminal Voltage Table (Reference)

Note
• Use the ground of terminal 2M and 2Q of the TCM when measuring terminal voltage, as an error may occur when connecting the negative circuit tester to ground.

Terminal

Signal

Connected to

Test Condition

Voltage (V)

Action

1A
Battery back up supply
Battery
Constant
B+
• Inspect related harness
1B
-
-
-
-
-
1C
-
-
-
-
-
1D
TR switch
(P position)
TR switch
P position
Below 1.0
• Inspect TR switch
• Inspect related harness
Other positions, all ranges
B+
1E
M range switch
M range switch
M range
Below 1.0
• Inspect Selector lever component
• Inspect related harness
Other positions, all ranges
B+
1F
-
-
-
-
-
1G
Brake switch
Brake switch
Brake pedal depressed
B+
• Inspect Brake switch
• Inspect related harness
Brake pedal released
Below 1.0
1H
-
-
-
-
-
1I
-
-
-
-
-
1J
-
-
-
-
-
1K
-
-
-
-
-
1M
-
-
-
-
-
1N
-
-
-
-
-
1P
-
-
-
-
-
1Q
-
-
-
-
-
1S
-
-
-
-
-
1T
-
-
-
-
-
1U
-
-
-
-
-
1V
CAN_H
PCM
Because this terminal is for serial communication, good/no good judgment by terminal voltage is not possible. Carry out inspection according to DTCs.
-
• Inspect related harness
1W
Shift up/Shift down signal
(Steering shift switch)
Steering shift switch
Up switch operated
(Steering shift switch)
2.0
• Inspect steering shift switch
• Inspect related harness
Down switch operated
(Steering shift switch)
2.5
Others
4.0
1Y
CAN_L
PCM
Because this terminal is for serial communication, good/no good judgment by terminal voltage is not possible. Carry out inspection according to DTCs.
-
• Inspect related harness
2A
Oil pressure switch B
Oil pressure switch B
2GR or 4GR
Below 1.0
• Inspect oil pressure switch B
• Inspect related harness
Others
Above 10
2B
TR switch
(N position)
TR switch
N position
B+
• Inspect TR switch
• Inspect related harness
Other positions, all ranges
Below 1.0
2C
TR switch
(R position)
TR switch
R position
Below 1.0
• Inspect TR switch
• Inspect related harness
Other ranges, all positions
B+
2D
Down switch
(Selector lever component)
Down switch
(Selector lever component)
Shift down
(M range)
Below 1.0
• Inspect Selector lever component
• Inspect related harness
Other ranges, all positions
B+
2E
TR switch
(D range)
TR switch
D range
Below 1.0
• Inspect TR switch
• Inspect related harness
Other ranges, all positions
B+
2F
Oil pressure switch C
Oil pressure switch C
3GR or 4GR
Below 1.0
• Inspect oil pressure switch C
• Inspect related harness
Others
Above 10
2G
Turbine sensor
Turbine sensor
• Inspect using the wave profile.
• Inspect turbine sensor
• Inspect related harness
2H
Oil pressure switch F
Oil pressure switch F
R position
Below 1.0
• Inspect oil pressure switch F
• Inspect related harness
Others
Above 10
2I
Up switch
(Selector lever component)
Up switch
(Selector lever component)
Shift up
(M range)
Below 1.0
• Inspect Selector lever component
• Inspect related harness
Other ranges, all positions
B+
2J
TFT sensor
TFT sensor
ATF temperature 20°C {68°F}
Approx. 1.55
• Inspect TFT sensor
• Inspect related harness
ATF temperature 40°C {104°F}
Approx. 1.08
ATF temperature 60°C {140°F}
Approx. 0.7
2K
Vehicle speed
VSS
• Inspect using the wave profile.
• Inspect TFT sensor
• Inspect related harness
2M
System GND
GND
Constant
Continuity
• Inspect related harness
2N
TFT sensor GND
TFT sensor
Constant
Continuity
• Inspect related harness
2P
Shift solenoid F control
Shift solenoid F
• Inspect using the wave profile.
• Inspect shift solenoid F
• Inspect related harness
2Q
System GND
GND
Constant
Continuity
• Inspect related harness
2S
Shift solenoid B control
Shift solenoid B
• Inspect using the wave profile.
• Inspect shift solenoid B
• Inspect related harness
2T
-
-
-
-
-
2U
GND return (solenoid ground)
Solenoid valve
Constant
Continuity
• Inspect related harness
2V
Shift solenoid C control
Shift solenoid C
• Inspect using the wave profile.
• Inspect shift solenoid C
• Inspect related harness
2W
TCC solenoid control
TCC solenoid
• Inspect using the wave profile.
• Inspect shift solenoid C
• Inspect related harness
2X
Pressure control solenoid control
Pressure control solenoid
N position
B+
• Inspect pressure control solenoid
• Inspect related harness
D range stall
Below 1.0
2Y
Shift solenoid A control
Shift solenoid A
• Inspect using the wave profile.
• Inspect shift solenoid C
• Inspect related harness
2Z
Power supply
Main relay
Ignition switch ON
B+
• Inspect main relay
• Inspect related harness
Ignition switch OFF
Below 1.0
2AA
Power supply
Main relay
Ignition switch ON
B+
• Inspect main relay
• Inspect related harness
Ignition switch OFF
Below 1.0

Inspection Using An Oscilloscope (Reference)

Turbine sensor

• TCM terminal: 2G (+)-2M (-)
• Oscilloscope setting: 5 V/DIV (Y) 250 microseconds/DIV (X)
• Measuring condition: Vehicle speed at 20 km/h {12 mph} (M range 1GR)

Vehicle speed

• TCM terminal: 2K (+)-2M (-)
• Oscilloscope setting: 5 V/DIV (Y) 2.5 ms/DIV (X)
• Measuring condition: Vehicle speed at 20 km/h {12 mph} (M range 1GR)

Shift solenoid F control

• TCM terminal: 2P (+)-2U (-)
• Oscilloscope setting: 5 V/DIV (Y) 10 ms/DIV (X)
• Measuring condition: P, N position, Idle

Shift solenoid B control

• TCM terminal: 2S (+)-2U (-)
• Oscilloscope setting: 5 V/DIV (Y) 10 ms/DIV (X)
• Measuring condition: P, N position, Idle

Shift solenoid C control

• TCM terminal: 2V (+)-2U (-)
• Oscilloscope setting: 5 V/DIV (Y) 10 ms/DIV (X)
• Measuring condition: P, N position, Idle

TCC solenoid control (TCC on)

• TCM terminal: 2W (+)-2M (-)
• Oscilloscope setting: 5 V/DIV (Y) 5 ms/DIV (X)
• Measuring condition: D range, TCC on (60 km/h {37 mph} or more)

TCC solenoid control (TCC off)

• TCM terminal: 2W (+)-2M (-)
• Oscilloscope setting: 5 V/DIV (Y) 5 ms/DIV (X)
• Measuring condition: P, N position, Idle

Shift solenoid A control

• TCM terminal: 2Y (+)-2U (-)
• Oscilloscope setting: 5 V/DIV (Y) 10 ms/DIV (X)
• Measuring condition: D range, 4GR