P0851

L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0851-775: Park / Neutral Switch Input Circuit Low
P0851-775 - Park / Neutral Switch Input Circuit Low

DESCRIPTION

The park/neutral position switch can send 8 different switch signals to the hybrid vehicle control ECU. The hybrid vehicle control ECU uses the signals to detect the shift lever position (P, R, N, or D). The hybrid vehicle control ECU also uses this information to determine intended direction of travel (forward or reverse).





WIRING DIAGRAM

Refer to the wiring diagram for DTC P0705-757 P0705.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT (HV)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

(d) Check if DTCs are output.

Result:





B -- GO TO DTC CHART Hybrid Control System
A -- Continue to next step.

2. CHECK PARK/NEUTRAL POSITION SWITCH

(a) Turn the power switch off.

(b) Disconnect connector E55 from the hybrid vehicle control ECU.

(c) Measure the resistance according to the value(s) in the table below.





Standard resistance:





NG -- INSPECT PARK/NEUTRAL POSITION SWITCH
OK -- Continue to next step.

3. CHECK FOR INTERMITTENT PROBLEMS

(a) Check for intermittent problems Check For Intermittent Problems.

NG -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK -- REPLACE HYBRID VEHICLE CONTROL ECU Components

4. INSPECT PARK/NEUTRAL POSITION SWITCH

(a) Disconnect the park/neutral position switch connector.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPLACE PARK/NEUTRAL POSITION SWITCH Components

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR