#
TCM INSPECTION [FS5A-EL]

id051721800300

  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. (See Inspection Using an Oscilloscope (Reference).) | • Inspect shift solenoid A • 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 • 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 • 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 • 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 • 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 • 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 • 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 | Shift solenoid F control | Shift solenoid F | 1GR, 2GR, 3GR, 4GR | B+ | • Inspect shift solenoid F • Inspect related harness
5GR | Below 1.0
1K | Back-up power supply | Battery (positive terminal) | Under any condition | B+ | • Inspect battery • Inspect related harness
1L | Vehicle speed output | BCM | • Inspect using the wave profile. (See Inspection Using an Oscilloscope (Reference).) | • Inspect VSS • Inspect BCM • Inspect related harness
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 (See SELECTOR LEVER COMPONENT INSPECTION.) • 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 (See SELECTOR LEVER COMPONENT INSPECTION.) • 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 (See SELECTOR LEVER COMPONENT INSPECTION.) • Inspect related harness
Other | B+
2G | - | - | - | - | -
2H | Selector lever position | TR switch (terminal C) | Ignition switch 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 • 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. (See Inspection Using an Oscilloscope (Reference).) | • Inspect input/turbine speed sensor • Inspect related harness
2L | Secondary gear rotating speed | Intermediate sensor | • Inspect using the wave profile. (See Inspection Using an Oscilloscope (Reference).) | • Inspect intermediate sensor • Inspect related harness
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, A/F sensor, HO2S, 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. (See Inspection Using an Oscilloscope (Reference).) | • 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 | - | - | - | - | -
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)

### Secondary gear rotating speed signal

TCM terminals

  • 2L(+)-1O(-)

Oscilloscope setting

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

Vehicle condition

  • Drive the vehicle at approx. 32 km/h {19.9 mph}

### VSS signal (input)

TCM terminals

  • 2P (+)-1O (-)

Oscilloscope setting

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

Vehicle condition

  • Drive the vehicle at approx. 32 km/h {19.9 mph}

### Vehicle speed signal (output)

TCM terminals

  • 1L (+)-1O (-)

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

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 A signal

(-)

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)

(+)

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

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

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

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

TCM terminals

  • 1C(+)-1P(-)

Oscilloscope setting

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

Vehicle condition

  • 1GR or 2GR