TCM INSPECTION (GENERAL (L.H.D.) SPECS. SPORT AT) [FN4A-EL]

id0517a18003b9

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.

Terminal

Signal

Connected to

Test condition

Voltage (V)

Action

1A
Shift solenoid A control
Shift solenoid A
• Inspect using the wave profile.
• Inspect shift solenoid A
• Inspect related harness
1B
Shift solenoid B control
Shift solenoid B
• Inspect using the wave profile.
• Inspect shift solenoid B
• Inspect related harness
1C
Shift solenoid C control
Shift solenoid C
• Inspect using the wave profile.
• Inspect shift solenoid C
• Inspect related harness
1D
-
-
-
-
-
1E
Pressure control solenoid (+)
Pressure control solenoid valve
• Inspect using the wave profile.
• Inspect pressure control solenoid valve
• Inspect related harness
1F
Shift solenoid D control
Shift solenoid D
Selector lever is at P, N position
B+
• Inspect shift solenoid D
• Inspect related harness
Other
Below 1.0
1G
Pressure control solenoid (-)
Pressure control solenoid valve
• Inspect using the wave profile.
• Inspect pressure control solenoid valve
• Inspect related harness
1H
Shift solenoid E control
Shift solenoid E
Detects TCC operation
B+
• Inspect shift solenoid E
• Inspect related harness
Other
Below 1.0
1I
-
-
-
-
-
1J
-
-
-
-
-
1K
Back-up power supply
Battery (positive terminal)
Under any condition
B+
• Inspect battery
• Inspect related harness
1L
-
-
-
-
-
1M
B+
Main relay
Ignition switch OFF
Below 1.0
• Inspect battery
• Inspect related harness
Ignition switch ON
B+
1N
B+
Main relay
Ignition switch OFF
Below 1.0
• Inspect battery
• Inspect related harness
Ignition switch ON
B+
1O
GND
GND
Under any condition
Below 1.0
• Inspect related harness
1P
GND
GND
Under any condition
Below 1.0
• Inspect related harness
2A
-
-
-
-
-
2B
M range
M range switch
Ignition switch ON
Manual mode
Below 1.0
• Inspect M range switch
• Inspect related harness
Other
B+
2C
-
-
-
-
-
2D
Manual up
Up switch
Ignition switch ON
Detects up-shift operation of selector lever in M range
Below 1.0
• Inspect up switch
• Inspect related harness
Other
B+
2E
-
-
-
-
-
2F
Manual down
Down switch
Ignition switch ON
Detects down-shift operation of selector lever in M range
Below 1.0
• Inspect down switch
• Inspect related harness
Other
B+
2G
Cruise control switch
Cruise control switch
Ignition switch ON
Cruise control switch ON
0
• Inspect cruise control switch
• Inspect related harness
Cruise control switch OFF
B+
2H
Selector lever position
TR switch
(terminal C)
Ignition switch ON
P position
Approx. 4.6
• Inspect TR switch
• 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.
• Inspect input/turbine speed sensor
• Inspect related harness
2J
Oil pressure
Oil pressure switch
Ignition switch ON
Detects forward clutch pressure
Below 1.0
• Inspect oil pressure switch
• Inspect related harness
Other
B+
2K
Input/turbine speed sensor (-)
Input/turbine speed sensor
• Inspect using the wave profile.
• Inspect input/turbine speed sensor
• Inspect related harness
2L
-
-
-
-
-
2M
ATF temperature
TFT sensor
Ignition switch ON
TFT 20 °C
{68 °F}
Approx. 3.3
• Inspect TFT sensor
• Inspect related harness
TFT 40 °C
{104 °F}
Approx. 2.4
TFT 60 °C
{140 °F}
Approx. 1.5
2N
-
-
-
-
-
2O
Sensor GND
MAF/IAT sensor, HO2S (front, rear), Variable resistor, ECT sensor, TP sensor, MAP sensor, TFT sensor, TR switch
Under any condition
Below 1.0
• Inspect related harness
2P
Vehicle speed
VSS
• Inspect using the wave profile.
• Inspect VSS
• Inspect related harness
2Q
-
-
-
-
-
2R
Main relay control
Main relay
Ignition switch OFF
B+
• Inspect main relay
• Inspect related harness
Ignition switch ON
Below 1.0
2S
Brake
Brake switch
Brake pedal depressed
B+
• Inspect brake switch
• Inspect related harness
Brake pedal released
Below 1.0
2T
-
-
-
-
-
2U
-
-
-
-
-
2V
-
-
-
-
-
2W
CAN_H
Instrument cluster, ABS HU/CM, ABS/TCS HU/CM, DSC HU/CM
Because this terminal is for CAN, adequate determination by terminal voltage is not possible.
-
2X
CAN_L
Instrument cluster, ABS HU/CM, ABS/TCS HU/CM, DSC HU/CM
Because this terminal is for CAN, adequate determination by terminal voltage is not possible.
-

Inspection Using an Oscilloscope (Reference)

VSS signal

TCM terminals

• 2P(+)-1O(-)

Oscilloscope setting

• 1 V/DIV (Y), 10 ms/DIV (X), DC range

Vehicle condition

• Drive the vehicle at approx. 10 km/h {6.2 mph}

Input/turbine speed sensor signal

TCM terminals

• 2I(+)-1O(-)

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 signal

(-)

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)
(+)

TCM terminals

• 1G(+)-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)

Shift solenoid A control

TCM terminals

• 1A(+)-1P(-)

Oscilloscope setting

• 5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition

• Idle after warm up (engine speed approx. 700 rpm, no load, P/S off, A/C off)

Shift solenoid B control

TCM terminals

• 1B(+)-1P(-)

Oscilloscope setting

• 5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition

• Idle after warm up (engine speed approx. 700 rpm, no load, P/S off, A/C off)

Shift solenoid C control

TCM terminals

• 1C(+)-1P(-)

Oscilloscope setting

• 5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition

• Idle after warm up (engine speed approx. 700 rpm, no load, P/S off, A/C off)