"P" Position Switch Circuit [01/2017 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Depress the brake pedal and move the shift lever to select neutral (N).
4. Push the P position switch (shift position indicator) to select park (P).
5. Jiggle the connectors and wire harness that connect the P position switch (shift position indicator) to the P1 terminal of the shift control ECU up and down, and left and right.
6. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

   Powertrain > Hybrid Control > Trouble Codes 

7. Check for DTCs.

   Result

   Result	Proceed to
   None of the DTCs are output.	A
   Any of the DTCs are output.	B

8. Turn the power switch off.

Result: 

B 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [01/2017 - 04/2020]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [04/2020 - 05/2023]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [05/2023 - ] 

Result: 

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Hybrid Control / Utility / Diagnosis Related Information.

   Powertrain > Hybrid Control > Utility 

   Tester Display
   Diagnosis Related Information

5. Check for diagnosis related information.

   Result

   Result	Proceed to
   No diagnosis related information is output.	A
   The diagnosis related information in the table below is output.	B

   Diagnosis Related Information
   P0850-11
   P0850-15

Result: 

A 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  ELECTRONIC CIRCUIT INSPECTION PROCEDURE [01/2017 - ] 

Result: 

B 

See step  3

1. Check the connector connections and contact pressure of the relevant terminals for the P position switch (shift position indicator) connector.

   Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [01/2017 - ]

   OK

   The connector is connected securely and there are no contact pressure problems.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Result

   Proceed to
   OK
   NG

Result: 

NG 

CONNECT SECURELY 

Result: 

OK 

See step  4

1. Check the connector connections and contact pressure of the relevant terminals for the shift control ECU connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [01/2017 - ]

   OK

   The connectors are connected securely and there are no contact pressure problems.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

CONNECT SECURELY 

Result: 

OK 

See step  5

1. Disconnect the P75 shift control ECU connector.
2. Disconnect the P39 P position switch (shift position indicator) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   P75-10 (P1) - P39-14 (S)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   P75-10 (P1) or P39-14 (S) - Body ground and other terminals	Always	10 kΩ or higher

4. Reconnect the P39 P position switch (shift position indicator) connector.
5. Reconnect the P75 shift control ECU connector.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  ELECTRONIC CIRCUIT INSPECTION PROCEDURE [01/2017 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR