Toyota Venza: Transmission Control Switch Circuit

Toyota Venza Service Manual / U660e Automatic Transmission / Transaxle / Automatic Transaxle System / 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

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (BATTERY - TRANSMISSION CONTROL SWITCH)

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

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
D14-6 (IG) - Body ground or other terminals	Ignition switch ON	11 to 14 V
D14-6 (IG) - Body ground or other terminals	Ignition switch off	Below 1 V

Text in Illustration

*1	Front view of wire harness connector (to Transmission Control Switch)

REPAIR OR REPLACE HARNESS OR CONNECTOR

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
D14-11 (E) - Body ground or other terminals	Always	Below 1 Ω

Text in Illustration

*1	Front view of wire harness connector (to Transmission Control Switch)

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH)

(a) Measure the resistance between each terminal of the transmission control switch when the shift lever is moved to each position.

Standard Resistance:

Tester Connection	Condition	Specified Condition
6 (IG) - 13 (S)	Shift lever in S, "+" or "-"	Below 1 Ω
6 (IG) - 13 (S)	Shift lever not in S, "+" or "-"	10 kΩ or higher
5 (SFTU) - 11 (E)	Shift lever held in "+" (Up-shift)	Below 1 Ω
5 (SFTU) - 11 (E)	Shift lever not held in "+"	10 kΩ or higher
4 (SFTD) - 11 (E)	Shift lever held in "-" (Down-shift)	Below 1 Ω
4 (SFTD) - 11 (E)	Shift lever not held in "-"	10 kΩ or higher

Text in Illustration

*1	Component without harness connected (Transmission Control Switch)

REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH)

4.	CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM)

(a) Connect the transmission control switch connector.

(b) Disconnect the ECM connector.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
A41-25 (S) - Body ground or other terminals	Ignition switch ON Shift lever in S, "+" or "-"	11 to 14 V
A41-25 (S) - Body ground or other terminals	Ignition switch ON Shift lever not in S, "+" or "-"	Below 1 V

Text in Illustration

*1	Front view of wire harness connector (to ECM)

(e) Turn the ignition switch off.

(f) Disconnect the spiral cable connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A41-38 (SFTU) - Body ground or other terminals	Shift lever held in "+" (Up-shift)	Below 1 Ω
A41-38 (SFTU) - Body ground or other terminals	Shift lever not held in "+"	10 kΩ or higher
A41-27 (SFTD) - Body ground or other terminals	Shift lever held in "-" (Down-shift)	Below 1 Ω
A41-27 (SFTD) - Body ground or other terminals	Shift lever not held in "-"	10 kΩ or higher

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

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