Scan Tool Testing and Procedures

Scan Tool Data

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As the data values given in the following table are standard values estimated on the basis of values obtained from the normally operating vehicles by using a scan tool, use them as reference value. Even when the vehicle is in good condition, there may be cases where the checked value does not fall within each specified data range. Therefore, judgment as abnormal should not be made by checking with these data alone.
Also, condition in the following table that can be checked by the scan tool are those detected by TCM and output from TCM as commands and there may be cases where the automatic transmission or actuator is not operating (in the condition) as indicated by the scan tool.

Scan Tool Data Definitions
Input Shaft Rev (RMP) Input shaft revolution computed by reference pulses coming from input shaft speed sensor on transmission case.
Gear Position (1ST, 2ND, 3RD, 4TH, 5TH, N, R) Current gear position computed by throttle position coming from ECM and vehicle speed.

Output Shaft Rev (RMP) Output shaft revolution computed by reference pulses coming from output shaft speed sensor on transmission case.

Vehicle Speed (km/h) Vehicle speed computed by reference pulses coming from vehicle speed sensor on transfer case.

Battery Voltage (V) Battery voltage read by TCM as analog input signal by TCM.

ATF Temp (°C) ATF temperature detected by signal from transmission fluid temperature sensor A installed in valve body.

Engine Speed (RPM) Engine speed computed by reference pulses coming from crankshaft position sensor.

Shift Sol A Con / MON (ON, OFF) COM-ON: ON command being outputted to shift solenoid-A. COM-OFF: OFF command not being outputted to shift solenoid-A. MON-ON: Electricity being passed to shift solenoid-A. MON-OFF: Electricity not being passed to shift solenoid-A.

Shift Sol B Con / MON (ON, OFF) COM-ON: ON command being outputted to shift solenoid-B. COM-OFF: OFF command not being outputted to shift solenoid-B. MON-ON: Electricity being passed to shift solenoid-B. MON-OFF: Electricity not being passed to shift solenoid-B.

Shift Sol E Con / MON (ON, OFF) COM-ON: ON command being outputted to shift solenoid-E. COM-OFF: OFF command not being outputted to shift solenoid-E. MON-ON: Electricity being passed to shift solenoid-E. MON-OFF: Electricity not being passed to shift solenoid-E.

TCC Sol Duty (%) Electric current value ration between electric current value being outputted from TCM to TCC solenoid and maximum value can be outputted by TCM.

Press Cont Sol A (%) Electric current value ratio between electric current value being outputted from TCM to pressure control solenoid-A and maximum value can be outputted by TCM.

Press Cont Sol B (%) Electric current value ration between electric current value being outputted from TCM to pressure control solenoid-B and maximum value can be outputted by TCM.

Press Cont Sol C (%) Electric current value ration between electric current value being outputted from TCM to pressure control solenoid-C and maximum value can be outputted by TCM.

Engine Torque (Nm) Actual engine torque detected by signal on CAN communication line fed from ECM.

Coolant Temp (°C) Engine coolant temperature detected by signal on CAN communication line fed from ECM.

O/D Off Switch (mon) (ON, OFF) Inputted signal from O/D OFF switch on select lever knob. ON: O/D OFF switch depressed. OFF: O/D OFF switch released.

Trans Range (P, R, N, D, 3, L) It indicates transmission range according to transmission range sensor signal.

Throttle Position % Throttle opening ratio detected by signal on CAN communication line fed from ECM.

Brake Switch (ON, OFF) Brake light switch position detected by signal on CAN communication line fed from ECM. ON: Brake pedal depressed OFF: Brake pedal released

4WD Low Switch (ON, OFF) Inputted signal from 4WD low switch on transfer case. ON: Transfer gear position is 4L OFF: Transfer gear position is 2H and 4H

A/C Switch (ON, OFF) ON: Signal which inform that air conditioner compressor is turned ON. OFF: Signal which inform that air conditioner compressor is turned OFF.

Mode Select Switch (NORMAL, POWER) Inputted signal from power mode switch on center console. NORMAL: Power mode switch is at OFF position. POWER: Power mode switch is at ON position.

Target Engine Torque Target engine torque detected by signal on CAN communication line fed from ECM.

Shifting Signal (ON, OFF) ON: Command for AT shift change operation being output. OFF: Command for AT shift change operation not being output.

MIL Request (ON, OFF) ON: Signal which TCM requires ECM to turn on malfunction indicator lamp. OFF: Signal which TCM does not require ECM to turn on malfunction indicator lamp.

Fuel Cut Flag ON: Signal which inform that fuel cut is operating. OFF: Signal which inform that fuel cut is not operating.