Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

CHECK WIRE HARNESS (TC OF DLC3 - TC OF ECM)

Turn the engine switch off.
Disconnect the connector from the ECM.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
J21-13 (TC) - A6-21 (TC)	Always	Below 1 Ω

Fig 1: Identifying Wire Harness (TC Of DLC3 - TC Of ECM)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE WIRE HARNESS

OK: Go to next step

CHECK WIRE HARNESS (CG OF DLC3 - BODY GROUND)

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
J21-4 (CG) - Body ground	Always	Below 1 Ω

Fig 2: Identifying DLC3 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE WIRE HARNESS

OK: Go to next step

CHECK WIRE HARNESS (TC OF DCL3 - BODY GROUND)

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
J21-13 (TC) - Body ground	Always	1 MΩ or higher

Fig 3: Identifying DLC3 Connector Terminals

NG: REPLACE WIRE HARNESS OR EACH ECU

OK: REPLACE CENTER AIRBAG SENSOR ASSEMBLY (See REMOVAL )