Inspection of TCM and Its Circuits

Inspection of TCM and Its Circuits
TCM and its circuits can be checked at TCM wiring connectors by measuring voltage and resistance.

CAUTION: TCM cannot be checked by itself, it is strictly prohibited to connect voltmeter or ohmmeter to TCM with connector disconnected from it.

Inspection
1. Remove TCM (1) from vehicle.
2. Connect TCM connectors (2) to TCM.
3. Check voltage at each terminal of connectors connected.

NOTE: As each terminal voltage is affected by battery voltage, confirm that it is 11 V or more when ignition switch is ON.





Terminal arrangement of TCM coupler (Viewed from harness side)

Terminal arrangement of TCM coupler (Viewed from harness side) (part 1):

Terminal arrangement of TCM coupler (Viewed from harness side) (part 2):

Terminal arrangement of TCM coupler (Viewed from harness side) (part 3):

Terminal arrangement of TCM coupler (Viewed from harness side) (part 4):

Terminal arrangement of TCM coupler (Viewed from harness side) (part 5):

1. Reference waveform No.1
Pressure control solenoid valve-C signal at ignition switch ON position








2. Reference waveform No.2
Pressure control solenoid valve?A signal at ignition switch ON position





3. Reference waveform No.3
Input shaft speed sensor signal at engine idling








4. Reference waveform No.4
Output shaft speed sensor signal at vehicle speed 20 km/h, 12.5 mile/h








5. Reference waveform No.5
Pressure control solenoid valve-B signal at ignition switch ON position








6. Reference waveform No.6
TCC solenoid valve signal at ignition switch ON position








7. Reference waveform No.7
CAN communication line signal at engine idling