DTC P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input); DTC P0850: Park / Neutral Switch Input Circuit: Procedure

1. Disconnect the P1 park/neutral position switch connector.
   Fig 1: Identifying P1 Park/Neutral Position Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance of the park/neutral position switch when the shift lever is moved to each position.

   Standard resistance

   Tester Connection	Shift Lever Position	Specified Condition
   1 (PL) - 3 (RB) and 6 (L) - 9 (B)	P	Below 1 Ω
   1 (PL) - 3 (RB) and 6 (L) - 9 (B)	Not on P	10 kΩ or higher
   2 (RL) - 3 (RB)	R	Below 1 Ω
   2 (RL) - 3 (RB)	Not on R	10 kΩ or higher
   3 (RB) - 5 (NL) and 6 (L) - 9 (B)	N	Below 1 Ω
   3 (RB) - 5 (NL) and 6 (L) - 9 (B)	Not on N	10 kΩ or higher
   3 (RB) - 7 (DL)	D, S, "+" or "-"	Below 1 Ω
   3 (RB) - 7 (DL)	Not on D, S, "+" or "-"	10 kΩ or higher

NG → REPLACE PARK/NEUTRAL POSITION SWITCH 

OK: Go to next step 

1. Disconnect the T29 switch connector.
   Fig 2: Identifying T29 Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance of the switch when the shift lever is moved to each position.

   Standard resistance

   Tester Connection	Shift Lever Position	Specified Condition
   3 - 7	S, "+" or "-"	Below 1 Ω
   3 - 7	Not on S, "+" or "-"	10 kΩ or higher

NG → REPLACE TRANSMISSION CONTROL SWITCH 

OK: Go to next step 

1. Turn the ignition switch ON.
   Fig 3: Identifying E3 And E5 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage of the wire harness side connectors.

   Standard voltage

   Tester Connection	Shift Lever Position	Specified Condition
   E3-4 (NSW) - Body ground	P or N	Below 1 V
   E3-4 (NSW) - Body ground	Not P or N	11 to 14 V
   E3-6 (P) - Body ground	P	11 to 14 V
   E3-6 (P) - Body ground	Not on P	Below 1 V
   E3-32 (N) - Body ground	N	11 to 14 V
   E3-32 (N) - Body ground	Not on N	Below 1 V
   E3-8 (R) - Body ground	R	11 to 14 V*
   E3-8 (R) - Body ground	Not on R	Below 1 V
   E3-9 (D) - Body ground	D or S	11 to 14 V
   E3-9 (D) - Body ground	Not on D or S	Below 1 V
   E5-9 (S) - Body ground	S, "+" or "-"	11 to 14 V
   E5-9 (S) - Body ground	Not on S, "+" or "-"	Below 1 V

   HINT: 

   *: The voltage will drop slightly due to the turning on of the back up light.

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK → REPLACE ECM