DTC P0850-12: Park/Neutral Switch Circuit Short to Battery; DTC P0850-14: Park/Neutral Switch Circuit Short to Ground or Open [12/2019 - 10/2022]: Procedure

1. In accordance with the display on the GTS, read the Data List.

   Powertrain > Transmission > Data List 

   Tester Display
   Shift SW Status (P Range)
   Shift SW Status (R Range)
   Shift SW Status (N Range)
   Shift SW Status (D Range)

   Powertrain > Transmission > Data List 

   Tester Display	Measurement Item	Range	Normal Condition
   Shift SW Status (P Range)	Park/Neutral position switch assembly status	OFF or ON	OFF: Shift lever not in P ON: Shift lever in P
   Shift SW Status (R Range)	Park/Neutral position switch assembly status	OFF or ON	OFF: Shift lever not in R ON: Shift lever in R
   Shift SW Status (N Range)	Park/Neutral position switch assembly status	OFF or ON	OFF: Shift lever not in N ON: Shift lever in N
   Shift SW Status (D Range)	Park/Neutral position switch assembly status	OFF or ON	OFF: Shift lever not in D or S ON: Shift lever in D or S

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  5

Result: 

OK 

See step  2

1. In accordance with the display on the GTS, read the Data List.

   Powertrain > Transmission > Data List 

   Tester Display
   Neutral Position SW

   Powertrain > Transmission > Data List 

   Tester Display	Measurement Item	Range	Normal Condition
   Neutral Position SW	Park/Neutral position switch assembly status	OFF or ON	OFF: Shift lever not in P or N ON: Shift lever in P or N

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

Result: 

NG 

See step  3

1. for 2WD Models:

   Refer to INSPECTION [12/2019 - 10/2022]

2. for AWD Models:

   Refer to INSPECTION [12/2019 - 10/2022]

Result

Result: 

NG 

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY 

1. for 2WD Models:

   Refer to REMOVAL [12/2019 - 10/2022]

2. for AWD Models:

   Refer to REMOVAL [12/2019 - 10/2022]

Result: 

OK 

See step  4

1. Disconnect the engine stop and start ECU connector.
2. Disconnect the park/neutral position switch assembly connector.
3. Disconnect the ECM connector.
4. Disconnect the certification ECU (smart key ECU Assembly) connector.
5. Remove the ST relay from the No. 1 engine room relay block and No. 1 junction block assembly.
6. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A34-21 (STA) - C52-9 (L)	Always	Below 1 Ω
   A34-17 (CLL) - C52-4 (B)	Always	Below 1 Ω
   A34-21 (STA) or C52-9 (L) - Body ground and other terminals	Always	10 kΩ or higher
   A34-17 (CLL) or C52-4 (B) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ENGINE STOP AND START ECU. Refer to  REMOVAL [12/2019 - 10/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. for 2WD Models:

   Refer to INSPECTION [12/2019 - 10/2022]

2. for AWD Models:

   Refer to INSPECTION [12/2019 - 10/2022]

Result

Result: 

NG 

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY 

1. for 2WD Models:

   Refer to REMOVAL [12/2019 - 10/2022]

2. for AWD Models:

   Refer to REMOVAL [12/2019 - 10/2022]

Result: 

OK 

See step  6

1. Disconnect the ECM connector.
2. Disconnect the park/neutral position switch assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C54-108 (P) - C52-3 (PL)	Always	Below 1 Ω
   C54-107 (R) - C52-2 (RL)	Always	Below 1 Ω
   C54-140 (N) - C52-8 (NL)	Always	Below 1 Ω
   C54-139 (D) - C52-7 (DL)	Always	Below 1 Ω
   C54-106 (NSW) - C52-4 (B)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [12/2019 - 09/2020]  , or refer to  REMOVAL [09/2020 - 10/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR