DTC P0851-775: Park / Neutral Switch Input Circuit Low: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Check if DTCs are output.

   Result

   Result	Proceed to
   P0851-775 only is output.	A
   P0705-757 is also output.	B

5. Turn the ignition switch off.

B → See step   6 

A: Go to next step 

1. Turn the ignition switch to ON.
2. Measure the voltage according to the value(s) in the table below.
   Fig 1: Checking Shift Lever Position Sensor Voltage

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A66-12 (N) - Body ground	Shift lever in N	11 to 14 V
   A66-12 (N) - Body ground	Shift lever not in N	1.2 to 2.8 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Hybrid Vehicle Control ECU)

3. Turn the ignition switch off.

NG → See step   4 

OK: Go to next step 

1. Check for intermittent problems. Refer to CHECK FOR INTERMITTENT PROBLEMS .

NG → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

OK → See step   7 

1. Disconnect the shift lever position sensor connector.
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.
   Fig 2: Checking Harness And Connector (Power Source Circuit)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   B50-8 (+B) - Body ground	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Shift Lever Position Sensor)

   NOTE:

   Turning the ignition switch to ON with the shift lever position sensor connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

4. Turn the ignition switch off.
5. Connect the shift lever position sensor connector.

NG → CHECK AND REPAIR POWER SOURCE CIRCUIT 

OK: Go to next step 

1. Disconnect the shift lever position sensor connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 3: Measuring Resistance In B50 Connector & Shift Lever Position Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B50-8 (+B) - B50-2 (N)	Shift lever in N	Below 1 Ω
   B50-8 (+B) - B50-2 (N)	Shift lever not in N	4.2 to 5.2 kΩ

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Shift Lever Position Sensor)

3. Connect the shift lever position sensor connector.

NG → See step   8 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR