LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 2021 >> MX-5 Miata Club, Automatic Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle (Service Information) >> TCM Inspection >> Notes

TCM Inspection: Notes

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. Measure the terminal voltage of the TCM using a tester.
G11279247Courtesy of MAZDA MOTORS CORP.
TERMINAL VOLTAGE SPECIFICATION

Terminal Connected to Test condition Specification Inspection item(s)
1A Turbine sensor
1B Turbine sensor Ignition switch ON Approx. 2.5 V
1C VSS Ignition switch ON Approx. 2.5 V
1D VSS
1E Sensor shield Under any condition Below 1.0 V
  • Inspect the related wiring harness
1F - - - -
1G - - - -
1H Sensor shield Under any condition Below 1.0 V
  • Inspect the related wiring harness
1I - - - -
1J - - - -
1K TR switch P position B+
R position B+
N position B+
D position Below 1.0 V
M position Below 1.0 V
1L - - - -
1M TR switch P position B+
R position Below 1.0 V
N position B+
D position B+
M position B+
1N TR switch P position B+
R position B+
N position Below 1.0 V
D position B+
M position B+
1O TR switch P position Below 1.0 V
R position B+
N position B+
D position B+
M position B+
1P - - - -
1Q TFT check connector Under any condition B+
  • Inspect the related wiring harness
1R IG1 relay Ignition switch OFF Below 1.0 V
  • Inspect the IG1 relay (See RELAY INSPECTION )
  • Inspect the related wiring harness
Ignition switch ON B+
1S - - - -
1T - - - -
1U - - - -
1V - - - -
1W - - - -
1X - - - -
1Y - - - -
1Z - - - -
1AA - - - -
1AB - - - -
1AC - - - -
1AD - - - -
1AE CAN related module Because this terminal is for communication, determination using terminal voltage inspection is not possible. Perform the inspection using the DTC inspection.
1AF - - - -
1AG - - - -
1AH - - - -
1AI CAN related module Because this terminal is for communication, determination using terminal voltage inspection is not possible. Perform the inspection using the DTC inspection.
2A - - - -
2B - - - -
2C CAN related module Because this terminal is for communication, determination using terminal voltage inspection is not possible. Perform the inspection using the DTC inspection.
2D TCC control solenoid
2E Line pressure control solenoid Idle and selector lever is at P position or N position Below 1.0 V
2F - - - -
2G CAN related module Because this terminal is for communication, determination using terminal voltage inspection is not possible. Perform the inspection using the DTC inspection.
2H - - - -
2I - - - -
2J TFT sensor ATF temperature 20°C {68°F} Approx. 3.0 V
ATF temperature 40°C {104°F} Approx. 2.1 V
ATF temperature 60°C {140°F} Approx. 1.4 V
2K - - - -
2L Shift solenoid G
2M TFT sensor Under any condition Below 1.0 V
2N - - - -
2O Shift solenoid F
2P GND Under any condition Below 1.0 V
  • Inspect the related wiring harness
2Q TCC control solenoid
2R Line pressure control solenoid
2S Shift solenoid D 1GR Below 1.0 V
2GR Below 1.0 V
3GR Below 1.0 V
4GR Below 1.0 V
5GR B+
6GR B+
2T - - - -
2U - - - -
2V Shift solenoid E 1GR B+
2GR B+
3GR B+
4GR B+
5GR Below 1.0 V
6GR Below 1.0 V
2W - - - -
2X GND Under any condition Below 1.0 V
  • Inspect the related wiring harness
2Y Shift solenoid G
2Z Shift solenoid F
2AA Shift solenoid C 1GR B+
2GR B+
3GR B+
4GR Below 1.0 V
5GR Below 1.0 V
6GR Below 1.0 V
2AB Shift solenoid B 1GR B+
2GR B+
3GR Below 1.0 V
4GR Below 1.0 V
5GR Below 1.0 V
6GR B+
2AC - - - -
2AD ACC relay Ignition switch OFF Below 1.0 V
  • Inspect the ACC relay (See RELAY INSPECTION )
  • Inspect the related wiring harness
Ignition switch ACC B+
2AE Battery Under any condition B+
2AF Shift solenoid A 1GR Below 1.0 V
2GR B+
3GR B+
4GR B+
5GR B+
6GR B+
2AG - - - -
2AH - - - -
2AI Battery Under any condition B+
scientia non olet · About LEMON Manuals