Transmission Control Switch Circuit: Procedure

WARNING: This page is about a different car, the 2010 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR (BATTERY - TRANSMISSION CONTROL SWITCH)

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

Fig 1: Disconnect The Transmission Control Switch Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Voltage

Tester Condition	Condition	Specified Condition
E31-3 (IG) - Body ground or other terminals	Ignition switch ON	11 to 14 V
E31-3 (IG) - Body ground or other terminals	Ignition switch off	Below 1 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

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

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

Fig 2: Measure The Resistance

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

Tester Connection	Condition	Specified Condition
E31-5 (E) - Body ground or other terminals	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH)

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

Fig 3: Measure The Resistance Between Each Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

Tester Connection	Condition	Specified Condition
3 (IG) - 7 (S)	Shift lever in S, "+" or "-"	Below 1 Ω
3 (IG) - 7 (S)	Shift lever not in S, "+" or "-"	10 kΩ or higher
2 (SFTU) - 5 (E)	Shift lever held in "+" (Up-shift)	Below 1 Ω
2 (SFTU) - 5 (E)	Shift lever not held in "+"	10 kΩ or higher
1 (SFTD) - 5 (E)	Shift lever held in "-" (Down-shift)	Below 1 Ω
1 (SFTD) - 5 (E)	Shift lever not held in "-"	10 kΩ or higher

NG → See step 6

OK: Go to next step

CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM)

Connect the transmission control switch connector.

Fig 4: Connect The Transmission Control Switch Connecto
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the ECM connector.
Turn the ignition switch to ON.

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

Standard Voltage

Tester Connection	Condition	Specified Condition
A24-25 (S) - Body ground or other terminals	Ignition switch ON Shift lever in S, "+" or "-"	11 to 14 V
A24-25 (S) - Body ground or other terminals	Ignition switch ON Shift lever not in S, "+" or "-"	Below 1 V

Turn the ignition switch off.
Disconnect the spiral cable connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A24-16 (SFTU) - Body ground or other terminals	Shift lever held in "+" (Up-shift)	Below 1 Ω
A24-16 (SFTU) - Body ground or other terminals	Shift lever not held in "+"	10 kΩ or higher
A24-51 (SFTD) - Body ground or other terminals	Shift lever held in "-" (Down-shift)	Below 1 Ω
A24-51 (SFTD) - Body ground or other terminals	Shift lever not held in "-"	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 5

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY (TRANSMISSION CONTROL SWITCH). Refer to REMOVAL