Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

CHECK WIRE HARNESS (TERMINAL TC of DLC3 - ECM)

Disconnect the E5 connector from the ECM.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE TABLE

Tester Connection	Condition	Specified Condition
E5-23 (TC) - D1-13 (TC)	Always	Below 1 Ω

Fig 1: Identifying D1 & E5 Connectors Terminals

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

OK: Go to Next Step

CHECK WIRE HARNESS (TERMINAL CG of DLC3 - BODY GROUND)

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE TABLE

Tester Connection	Condition	Specified Condition
D1-4 (CG) - Body ground	Always	Below 1 Ω

Fig 2: Identifying D1 CG Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: Go to Next Step

CHECK WIRE HARNESS (TERMINAL TC of DLC3 - BODY GROUND)

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE TABLE

Tester Connection	Condition	Specified Condition
D1-13 (TC) - Body ground	Always	10 kΩ or higher

Fig 3: Identifying D1 TC Connector Terminals

NG: REPAIR OR REPLACE HARNESS, CONNECTOR, OR EACH ECU

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