Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

CHECK WIRE HARNESS (TC of DLC3 - ECM)

Disconnect the A24 connector from the ECM.

Fig 1: Disconnecting A24 Connector From ECM
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
TC (A24-23) - TC (D20 - 13)	Always	Below 1 Ω

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

OK: Go to Next Step

CHECK WIRE HARNESS (CG of DLC3 - BODY GROUND)

Fig 2: Identifying Terminals Of DLC3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

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

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

OK: Go to Next Step

CHECK WIRE HARNESS (TC of DLC3 - BODY GROUND)

Fig 3: Identifying Terminals Of DLC3

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

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

NG: REPAIR OR REPLACE WIRE HARNESS OR ECU

OK: REPLACE ECM