Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM10000000101MF
Model Year Start: 2017 Model: Sienna Prod Date Range: [08/2016 -           ]
Title: UA80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: Transmission Control Switch Circuit; 2017 - 2020 MY Sienna [08/2016 -        ]

Transmission Control Switch Circuit

DESCRIPTION

When the shift lever is in S and moved toward "-" or "+", it is possible to select different shift ranges (S1 to S8).

Moving the shift lever toward "+" increases the shift range by one, and moving the shift lever toward "-" decreases the shift range by one.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

READ VALUE USING TECHSTREAM (SHIFT SW STATUS (S RANGE))

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Transmission / Data List

(e) Read the Data List according to the display on the Techstream.

Transmission

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Shift SW Status (S Range)

Sport (S) mode select switch status

ON or OFF
  • ON: Shift lever in S, "+" or "-"
  • OFF: Shift lever not in S, "+" or "-"

-

Result

Proceed to

Data List values are normal

A

Data List values are not normal

B
B

GO TO STEP 6

A

2.

READ VALUE USING TECHSTREAM (SPORT SHIFT UP SW AND SPORT SHIFT DOWN SW)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Data List

(e) Read the Data List according to the display on the Techstream.

Engine

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Sport Shift Up SW

Sport shift up switch status

ON or OFF
  • ON: Shift lever held in "+" (Up shift)
  • OFF: Shift lever not held in "+" (Up shift)

-

Sport Shift Down SW

Sport shift down switch status

ON or OFF
  • ON: Shift lever held in "-" (Down shift)
  • OFF: Shift lever not held in "-" (Down shift)

-

Result

Proceed to

Data List values are normal

A

Data List values are not normal

B
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

B

3.

INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH)

(a) Disconnect the D41 transmission control switch connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

5 (SFTU) - 11 (E)

Shift lever held in "+" (Up shift)

Below 1 Ω

Shift lever not held in "+" (Up shift)

10 kΩ or higher

4 (SFTD) - 11 (E)

Shift lever held in "-" (Down shift)

Below 1 Ω

Shift lever not held in "-" (Down shift)

10 kΩ or higher

*a

Component without harness connected

(Transmission Control Switch)
NG

REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH)

OK

4.

CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - BODY GROUND)

(a) Disconnect the transmission control switch connector.

*a

Front view of wire harness connector

(to Transmission Control Switch)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D41-11 (E) - Body ground

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM)

(a) Connect the D41 transmission control switch connector.

(b) Disconnect the A69 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A69-38 (SFTU) - Body ground

Shift lever held in "+" (Up shift)

Below 1 Ω

Shift lever not held in "+" (Up shift)

10 kΩ or higher

A69-37 (SFTD) - Body ground

Shift lever held in "-" (Down shift)

Below 1 Ω

Shift lever not held in "-" (Down shift)

10 kΩ or higher
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM)

6.

INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH)

(a) Disconnect the D41 transmission control switch connector.

*a

Component without harness connected

(Transmission Control Switch)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

6 (IG) - 13 (S)

Shift lever in S, "+" or "-"

Below 1 Ω

Shift lever not in S, "+" or "-"

10 kΩ or higher
NG

REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH)

OK

7.

CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH (POWER SOURCE))

(a) Disconnect the transmission control switch connector.

*a

Front view of wire harness connector

(to Transmission Control Switch)

(b) Turn the ignition switch to ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

D41-6 (IG) - Body ground

Ignition switch ON

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

8.

CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM)

(a) Disconnect the D41 transmission control switch connector.

(b) Disconnect the A69 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D41-13 (S) - A69-17 (S)

Always

Below 1 Ω

D41-13 (S) or A69-17 (S) - Body ground and other terminals

Always

10 kΩ or higher
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR