18 LS430 − NEW FEATURES Construction and Operation of Main Component 1) ATF Temperature Sensor ATF temperature sensor (OIL) is used for hydraulic pressure control. This sensor is used for revision of clutches and brakes pressure to keep smooth shift quality. ATF Temperature Sensor (OIL) 2 Front 259LSK14 2) Transmission Control Switch and Park/Neutral Position Switch The ECM uses these switches to detect the shift position. The park/neutral position switch sends the P, R, N, D and STAR position signals to the ECM. It also sends signals for the shift indicator light (P, R, N, and D) in the combination meter.
The transmission control switch is installed inside shift lever assembly to detect the shift lever position and to inform ECM. The ECM turns on the shift position indicator light in the combination meter. The transmission control switch detects whether the shift lever is in the D position or in the S mode position, and detects the operating conditions of the shift lever (front [+ position] or rear [− position]) if the S mode is selected, and sends signals to the ECM.
Wiring Diagram to D-IG1 Relay Park/Neutral Position Switch to IG1 Relay to Starter Relay Transmission Control Switch E IG RB B SFTD SFTU S PL RL NL DL L SFTD SFTU S P R N D STAR ECM CAN Gateway ECU BEAN Combination Meter S Mode Indicator Light Shift Position Indicator Light Shift Range Indicator Light 259LSK15