Inspection of TCM and Its Circuits
Inspection of TCM and Its CircuitsTCM and its circuits can be checked at TCM wiring connectors by measuring voltage and resistance.
CAUTION:
It is strictly prohibited to connect voltmeter or ohmmeter to TCM with connector disconnected from it.
Voltage Check
1) Remove TCM (1) from vehicle.
2) Connect TCM connectors (2) to TCM.
3) Check voltage and/or pulse signal at each terminal of connectors connected using voltmeter (3) and oscilloscope (4).
NOTE:
^ As each terminal voltage is affected by battery voltage, confirm that it is 11 V or more when ignition switch is ON.
^ Voltage with asterisk (*) cannot be measured by voltmeter because it is pulse signal. Check it with oscilloscope if necessary.
^ *1: Reference voltage
Connector "C09"
Connector "C10"
Reference Waveform
NOTE:
^ Waveform analysis is as follows.
^ Waveform might change for measurement condition and vehicle spec.
CAN Communication Signal
CAN communication signal (High) (1):
CAN communication signal (Low) (2):
Measurement condition
^ Engine: Stop
^ Ignition switch: ON
TCC solenoid valve signal
TCC solenoid valve signal (1):
Measurement condition
^ Vehicle: Running
^ CVT: Lock-up on after warming up
^ Vehicle: Running
^ CVT: Lock-up off after warming up
Secondary pressure control solenoid valve signal
Secondary pressure control solenoid valve signal (1):
Measurement condition
^ Engine: Running after warming up
^ Select lever position: "D" range
^ Accelerator pedal: Depressed fully
^ Engine: Idle speed
^ Select lever position: "D" range
^ Accelerator pedal: Released
Line pressure control solenoid valve signal
Line pressure control valve signal (1):
Measurement condition
^ Engine: Running after warming up
^ Select lever position: "D" range
^ Accelerator pedal: Depressed fully
^ Engine: Idle speed
^ Select lever position: "D" range
^ Accelerator pedal: Released
Stepper motor signal
Stepper motor No.1 signal (1):
Stepper motor No.2 signal (2):
Stepper motor No.3 signal (1):
Stepper motor No.4 signal (2):
Measurement condition
^ Ignition switch: For 10 sec. from ignition switch turned ON
Secondary pulley speed sensor signal
Secondary pulley speed sensor signal (1):
Measurement condition
^ Vehicle: Drive vehicle at 40 km/h (25 mile/h)
^ CVT: After warming up
^ Vehicle: Drive vehicle at 20 km/h (12 mile/h)
^ CVT: After warming up
Primary pulley speed sensor signal
Primary pulley speed sensor signal (1):
Measurement condition
^ Vehicle: Drive vehicle at 40 km/h (25 mile/h)
^ CVT: After warming up
^ Vehicle: Drive vehicle at 20 km/h (12 mile/h)
^ CVT: After warming up
