DTC P0850-11: Park/Neutral Switch Circuit Short to Ground; DTC P0850-15: Park/Neutral Switch Circuit Short to Auxiliary Battery or Open [11/2015 - ]: Description

Instead of having a parking position as one of the positions as on a conventional shift lever, a P position switch (transmission shift main switch) is provided independently above the shift lever. The switch is a momentary type, in which the button does not lock mechanically.

The P position switch (transmission shift main switch) contains resistors R1 and R2. When the P position switch (transmission shift main switch) is not pressed, the switch provides a combined resistance of R1 and R2; and when the P position switch (transmission shift main switch) is pressed, the switch provides only the resistance of R1. The voltage at the P1 terminal of the hybrid vehicle control ECU varies with the changes in the resistance of the switch. The hybrid vehicle control ECU determines the P position switch (transmission shift main switch) operation according to this resistance signal.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate
P0850-11	Park/Neutral Switch Circuit Short to Ground	GND short in P position switch circuit (1 trip detection logic)	Wire harness or connector P position switch (Transmission shift main switch) Hybrid vehicle control ECU	Does not come on	Master Warning Light: Comes on
P0850-15	Park/Neutral Switch Circuit Short to Auxiliary Battery or Open	Open or +B short in P position switch circuit (1 trip detection logic)	Wire harness or connector P position switch (Transmission shift main switch) Hybrid vehicle control ECU	Does not come on	Master Warning Light: Comes on

RELATED DATA LIST

DTC No.	Data List
P0850-11	P Position Switch Terminal Voltage*1 BATT Voltage Shift Switch Status (N, P Position)
P0850-15

*1: While the P position switch (transmission shift main switch) is being pushed, the value for Data List item "P Position Switch Terminal Voltage" will decrease.