Transmission Control Switch Circuit: Procedure

1. Disconnect the transmission control switch connector of shift lock control unit assembly.
   Fig 1: Identifying E39 Transmission Control Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   6 - Body ground	IG switch ON	11 to 14 V
   	IG switch OFF	Below 1 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying E39 Transmission Control Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Condition	Specified Condition
   11 - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

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.
   Fig 3: Identifying E39 Transmission Control Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance (Check for short)

   Tester Connection	Shift Position	Specified Condition
   6 - 13	S, "+" and "-"	Below 1 Ω
   	Except S, "+" and "-"	10 kΩ or higher
   5 - 11	Press continuously "+" (Up shift)	Below 1 Ω
   	S	10 kΩ or higher
   4 - 11	Press continuously "-" (Down shift)	Below 1 Ω
   	S	10 kΩ or higher

NG → See step   6 

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 ignition switch to ON, and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.
   Fig 4: Identifying Terminal S Of B29 ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Shift Position	Specified Condition
   B29-74 (S) - Body ground	S, "+" and "-"	11 to 14 V
   	Except S, "+" and "-"	Below 1 V

4. Turn the ignition switch off.
5. Disconnect the ECM connector.
   Fig 5: Identifying Terminal SFTD And SFTU Of A37 ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

   Standard resistance (Check for short)

   Tester Connection	Shift Position	Specified Condition
   A37-16 (SFTU) - Body ground	Press continuously "+" (Up shift)	Below 1 Ω
   	S	10 kΩ or higher
   A37-51 (SFTD) - Body ground	Press continuously "-" (Down shift)	Below 1 Ω
   	S	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   5