Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VIMH
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 08/2016]
Title: U660F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: Transmission Control Switch Circuit; 2016 MY Sienna [12/2015 - 08/2016]

Transmission Control Switch Circuit

DESCRIPTION

When the shift lever is in S and it is moved toward "-" or "+", it is possible to select different shift ranges (1st through 6th ranges).

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 inspection procedure.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (BATTERY - TRANSMISSION CONTROL SWITCH)

(a) Disconnect the transmission control switch connector of shift lock control unit.

(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

Ignition switch off

Below 1 V

Text in Illustration

*a

Front view of wire harness connector

(to Transmission Control Switch)
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

2.

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

(a) 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

Text in Illustration

*a

Front view of wire harness connector

(to Transmission Control Switch)
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

INSPECT SHIFT LOCK CONTROL UNIT (TRANSMISSION CONTROL SWITCH)

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

Standard Resistance:

Tester Connection

Switch 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

5 (SFTU) - 11 (E)

Shift lever held in "+"

(Up-shift)

Below 1 Ω

Shift lever not held in "+"

10 kΩ or higher

4 (SFTD) - 11 (E)

Shift lever held in "-"

(Down-shift)

Below 1 Ω

Shift lever not held in "-"

10 kΩ or higher

Text in Illustration

*a

Component without harness connected

(Transmission Control Switch)
NG

REPLACE SHIFT LOCK CONTROL UNIT (TRANSMISSION CONTROL SWITCH)

OK

4.

CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM)

(a) Disconnect the ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D41-4 (SFTD) - A39-27 (SFTD)

Always

Below 1 Ω

D41-5 (SFTU) - A39-38 (SFTU)

Always

Below 1 Ω

D41-13 (S) - A39-25 (S)

Always

Below 1 Ω

D41-4 (SFTD) - Body ground

Always

10 kΩ or higher

D41-5 (SFTU) - Body ground

Always

10 kΩ or higher

D41-13 (S) - Body ground

Always

10 kΩ or higher
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR