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.

Fig 1: Identifying D1 & E5 Connector Terminals
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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

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