Transmission Control Switch Circuit: Wiring Diagram

1. Disconnect the transmission control switch connector of shift lock control unit assembly.
2. Measure the voltage according to the value(s) in the table below.

   Voltage 

   TERMINALS VOLTAGE SPECIFICATIONS
   
   

   Switch Condition	Tester Connection	Specified Condition
   Engine switch on (IG)	3 - Body ground	10 to 14 V
   Engine switch off		Below 1 V

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Identifying Transmission Control Switch Connector (1 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP. 

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

   Resistance 

   TERMINALS RESISTANCE SPECIFICATIONS
   
   

   Tester Connection	Specified Condition
   5 - Body ground	Below 1 Ω

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 3: Identifying Transmission Control Switch Connector (2 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP. 

1. Measure resistance between each terminal of shift lock control unit assembly when the shift lever is moved to each position.

   Resistance 

   TERMINALS RESISTANCE SPECIFICATIONS
   
   

   Shift Position	Tester Connection	Specified Condition
   S, "+" and "-"	3 - 7	Below 1 Ω
   Except S, "+" and "-"		10 kΩ or higher
   Press continuously "+" (Up shift)	2 - 5	Below 1 Ω
   S		10 kΩ or higher
   Press continuously "-" (Down shift)	1 - 5	Below 1 Ω
   S		10 kΩ or higher

NG : REPLACE TRANSMISSION CONTROL SWITCH 

Fig 4: Identifying Shift Lock Control Unit Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP. 

1. Connect the transmission control switch connector of shift lock control unit assembly.
2. Disconnect the ECM connector.
3. Turn the engine switch on (IG) position, and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.

   Voltage 

   TERMINALS VOLTAGE SPECIFICATIONS
   
   

   Shift Position	Tester Connection	Specified Condition
   S, "+" and "-"	A7 - 9 (S) - Body ground	10 to 14 V
   Except S, "+" and "-"		Below 1 V

   Fig 5: Identifying ECM Connector (1 Of 2)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Turn the engine switch off position.
5. Disconnect the ECM connector.
6. Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

   Resistance 

   TERMINALS RESISTANCE SPECIFICATIONS
   
   

   Shift Position	Tester Connection	Specified Condition
   Press continuously "+" (Up shift)	A7 - 30 (SFTU) - Body ground	Below 1 Ω
   S		10 kΩ or higher
   Press continuously "-" (Down shift)	A7 - 19 (SFTD) - Body ground	Below 1 Ω
   S		10 kΩ or higher

   Fig 6: Identifying ECM Connector (2 Of 2)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE