Transmission Control Switch Circuit: Procedure

CHECK WIRE HARNESS (TRANSMISSION CONTROL SWITCH - BATTERY)

Disconnect the T29 transmission control switch connector of the shift lock control unit.

Fig 1: Identifying Terminals Of T29 Transmission Control Switch Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage of the wire harness side connector.

Standard voltage

Tester Connection	Switch Condition	Specified Condition
T29-3 (IG) - Body ground	Ignition switch ON	11 to 14 V
T29-3 (IG) - Body ground	Ignition switch OFF	Below 1 V

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go to next step

CHECK WIRE HARNESS (TRANSMISSION CONTROL SWITCH - BODY GROUND)

Measure the resistance of the wire harness side connector.

Fig 2: Identifying T29 Wire Harness (Transmission Control Switch - Body Ground) Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

Tester Connection	Specified Condition
T29-5 (E) - Body ground	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go to next step

INSPECT TRANSMISSION CONTROL SWITCH

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

Fig 3: Identifying Transmission Control Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

Tester Connection	Shift Lever Position	Specified Condition
3 (IG) - 7 (S)	S, "+" or "-"	Below 1 Ω
3 (IG) - 7 (S)	Not on S, "+" or "-"	10 kΩ or higher
2 (SFTU) - 5 (E)	Continuously shift to "+" (Up-shift)	Below 1 Ω
2 (SFTU) - 5 (E)	S	10 kΩ or higher
1 (SFTD) - 5 (E)	Continuously shift to "-" (Down-shift)	Below 1 Ω
1 (SFTD) - 5 (E)	S	10 kΩ or higher

NG → REPLACE TRANSMISSION CONTROL SWITCH

OK: Go to next step

CHECK WIRE HARNESS (ECM - BATTERY)

Turn the ignition switch ON.

Fig 4: Identifying E5 Wire Harness (ECM-Battery) Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage of the wire harness side connector.

Standard voltage

Tester Connection	Shift Lever Position	Specified Condition
E5-9 (S) - Body ground	S, "+" or "-"	11 to 14 V
E5-9 (S) - Body ground	Not on S, "+" or "-"	Below 1 V

Turn the ignition switch OFF.

Fig 5: Identifying ECM Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the E5 ECM connector.

Measure the resistance of the wire harness side connector.

Standard resistance

Tester Connection	Shift Lever Position	Specified Condition
E5-30 (SFTU) - Body ground	Continuously shift to "+" (Up-shift)	Below 1 Ω
E5-30 (SFTU) - Body ground	S	10 kΩ or higher
E5-19 (SFTD) - Body ground	Continuously shift to "-" (Down-shift)	Below 1 Ω
E5-19 (SFTD) - Body ground	S	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE