Kick-down switch

The resistance of the main shaft rpm and vehicle speed sensors can be measured by disconnecting the connectors and connecting an ohmmeter as shown in the figure. Resistance of main shaft rpm sensor: 430 ± 43 ohm at 20°C Resistance of vehicle speed sensor: 720 ± 72 ohm at 20°C.

KICK-DOWN SWITCH

The kick-down switch is installed on the accelerator pedal and is operated when the accelerator pedal is pressed beyond a certain travel. When the switch is operated, the control module (terminal R6) scales the transmission ratio in accordance with the vehicle speed, adhering to the selected gear change program. With the switch at the ON position, the control unit effects the gear changes at higher engine speeds.

STOP LIGHTS SWITCH

The switch, mounted on the pedal assembly, is closed when the brake pedal is pressed, causing the STOP lights to come on and supplying the L9 terminal of the control module to exclude the torque converter lock-up function when the brake pedal is pressed.

THROTTLE VALVE POSITION SIGNAL

The throttle valve position signal is acquired by the fuel injection/ignition control unit, which detects it via the potentiometer installed on the throttle body. The automatic transmission control unit uses this signal (PWM type with variable duty cycle), receiving it directly from the fuel injection/ignition control unit.

ENGINE COOLANT TEMPERATURE SIGNAL

The engine coolant temperature signal is received by the fuel injection-ignition control unit, which detects it via an NTC sensor located on the thermostat body. The automatic transmission control unit uses an ON/OFF type signal generated by the fuel injection/ignition control unit; the signal is changed over at a coolant temperature of 75°C.