Circuit Description

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

The park/neutral position switch detects the shift lever position and sends signals to the ECM.

The ECM receives signals (P, R, N, D, 4, 3, 2 and L) from the park/neutral position switch. When the signal is not sent to the ECM from the park/neutral position switch, the ECM judges that the shift lever is in D position.

When the shift lever is in the 4 position (with transmission control switch for D and 4 pressed), "4" in the shift position indicator light will come on and when the shift lever is in the D position (with transmission control switch for D and 4 released), "D" in the shift position indicator light will come on.

When the shift lever is in the L position (with transmission control switch for 2 and L pressed), "L" in the shift position indicator light will come on and when the shift lever is in the 2 position (with transmission control switch for 2 and L released), "2" in the shift position indicator light will come on.

DTC CONDITION DETECTION CHART

DTC No.	DTC Detection Condition	Trouble Area
P0705	(2-trip detection logic) All switches are OFF simultaneously for P, R, N, D, 3 and 2 positions. 2 or more switches are ON simultaneously for P, R, N, (D 4), 3 and (2 L) positions.	Open or short in park/neutral position switch circuit Park/neutral position switch ECM