Transmission Control Switch Circuit [11/2023 - ]: Procedure

1. Read the DTCs using the GTS.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output	B

Result: 

B 

GO TO DTC CHART. Refer To  DIAGNOSTIC TROUBLE CODE CHART [11/2023 - ] 

Result: 

A 

See step  2

1. According to the display on the GTS, read the Data List.

   Powertrain > Engine > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Shift SW Status (S Range)	Transmission control switch status	OFF or ON	ON: Shift lever in M, "+" or "-" OFF: Shift lever not in M, "+" or "-"	-

   Powertrain > Engine > Data List 

   Tester Display
   Shift SW Status (S Range)

   Result

   Result	Proceed to
   Data List value is normal	A
   Data List value is not normal	B

Result: 

B 

See step  8

Result: 

A 

See step  3

1. According to the display on the GTS, read the Data List.

   Powertrain > Engine > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Sport Shift Up SW	Sport shift up switch status	OFF or ON	ON: Shift lever held in "+" or "+" shift paddle switch operated OFF: Shift lever not held in "+" and "+" shift paddle switch released	-
   Sport Shift Down SW	Sport shift down switch status	OFF or ON	ON: Shift lever held in "-" or "-" shift paddle switch operated OFF: Shift lever not held in "-" and "-" shift paddle switch released	-

   Powertrain > Engine > Data List 

   Tester Display
   Sport Shift Up SW
   Sport Shift Down SW

   Result

   Result	Proceed to
   Data List values are normal	A
   Data List values are not normal	B

Result: 

A 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [11/2023 - ] 

Result: 

B 

See step  4

1. Disconnect the I16 shift lock control unit assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Shift Lock Control Unit Assembly (Transmission Control Switch))

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 (SFTU) - 2 (E)	Shift lever held in "+" (Up shift)	Below 1 Ω
   3 (SFTU) - 2 (E)	Shift lever not held in "+" (Up shift)	10 kΩ or higher
   1 (SFTD) - 2 (E)	Shift lever held in "-" (Down shift)	Below 1 Ω
   1 (SFTD) - 2 (E)	Shift lever not held in "-" (Down shift)	10 kΩ or higher

3. Connect the I16 shift lock control unit assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY. Refer to  REMOVAL [11/2023 - ] 

Result: 

OK 

See step  5

1. Disconnect the I16 shift lock control unit assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I16-2 (E) - Body ground	Always	Below 1 Ω

3. Connect the I16 shift lock control unit assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - BODY GROUND) 

Result: 

OK 

See step  6

1. Disconnect the A199 ECM connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A199-79 (SFTU) - Body ground	Shift lever held in "+" (Up shift)	Below 1 Ω
   A199-79 (SFTU) - Body ground	Shift lever not held in "+" (Up shift)	10 kΩ or higher
   A199-78 (SFTD) - Body ground	Shift lever held in "-" (Down shift)	Below 1 Ω
   A199-78 (SFTD) - Body ground	Shift lever not held in "-" (Down shift)	10 kΩ or higher

3. Connect the A199 ECM connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - ECM) 

Result: 

OK 

See step  7

HINT: 

Refer to REMOVAL [11/2023 - ]

Result

Result: 

NEXT 

PERFORM REGISTRATION AND INITIALIZATION 

for Registration: Refer to REGISTRATION [11/2023 - ]

for Initialization: Refer to INITIALIZATION [11/2023 - ]

1. Disconnect the I16 shift lock control unit assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Shift Lock Control Unit Assembly (Transmission Control Switch))

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4 (IG) - 5 (S)	Shift lever in M, "+" or "-"	Below 1 Ω
   4 (IG) - 5 (S)	Shift lever not in M, "+" or "-"	10 kΩ or higher

3. Connect the I16 shift lock control unit assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY. Refer to  REMOVAL [11/2023 - ] 

Result: 

OK 

See step  9

1. Disconnect the I16 shift lock control unit assembly connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   I16-4 (IG) - Body ground	Ignition switch ON	11 to 14 V
   I16-4 (IG) - Body ground	Ignition switch off	Below 1 V

3. Connect the I16 shift lock control unit assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

CHECK POWER SOURCE CIRCUIT (SHIFT LOCK CONTROL UNIT ASSEMBLY) 

Result: 

OK 

See step  10

1. Disconnect the A199 ECM connector.
2. Disconnect the I16 shift lock control unit assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I16-5 (S) - A199-94 (S)	Always	Below 1 Ω
   I16-5 (S) or A199-94 (S) - Body ground and other terminals	Always	10 kΩ or higher

4. Connect the A199 ECM connector.
5. Connect the I16 shift lock control unit assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (SHIFT LOCK CONTROL UNIT ASSEMBLY - ECM) 

Result: 

OK 

See step  11

HINT: 

Refer to REMOVAL [11/2023 - ]

Result

Result: 

NEXT 

PERFORM REGISTRATION AND INITIALIZATION 

for Registration: Refer to REGISTRATION [11/2023 - ]

for Initialization: Refer to INITIALIZATION [11/2023 - ]