Inspection Procedure

WARNING: This page is about a different car, the 2008 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 A55 connector from the ECM.

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

Standard resistance

RESISTANCE REFERENCE

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

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

Fig 1: Identifying A55 And D20 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.

Standard resistance

RESISTANCE REFERENCE

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

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

Fig 2: Identifying DLC3 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.

Standard resistance

RESISTANCE REFERENCE

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

NG: REPAIR OR REPLACE WIRE HARNESS OR ECU

Fig 3: Identifying D20 And TC Connector Terminal

OK : REPLACE ECM