TC and CG Terminal Circuit: Procedure

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM)

Disconnect the ECM connector.

Fig 1: Identifying A55 And D20 Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A55-27 (TC) - D20-13 (TC)	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (DLC3 - ECM)

OK: Go to next step

CHECK HARNESS AND CONNECTOR (CG of DLC3 - BODY GROUND)

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

Fig 2: Identifying CG Of DLC3 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

Tester Connection	Condition	Specified Condition
D20-4 (CG) - Body ground	Always	Below 1 Ω

Connect the ECM connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (DLC3 - BODY GROUND)

OK: Go to next step

CHECK HARNESS AND CONNECTOR (TC of DLC3 - BODY GROUND)

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

Fig 3: Identifying TC Of DLC3 Connector Terminals

Standard Resistance

Tester Condition	Condition	Specified Condition
D20-13 (TC) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE WIRE HARNESS OR EACH ECU

OK → REPLACE ECM