Inspection Procedure

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

CHECK HARNESS AND CONNECTOR (DLC3 - ECM)

Turn the ignition switch off.
Disconnect the ECM connector.

Measure the resistance.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Specified Condition
D15-13(TC) - A21-27 (TC)	Below 1 Ω

Fig 1: Identifying DLC3 Connector Terminal And ECM Connector Terminal

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NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)

Measure the resistance.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Specified Condition
D15-4 (CG) - Body ground	Below 1 Ω

Fig 2: Identifying DLC3 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

Disconnect the ECM connector.

Fig 3: Identifying ECM Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Specified Condition
A21-27 (TC) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

REPLACE ECM

Replace the ECM.

Check for DTCs of the ECM (See DTC CHECK/CLEAR ).

Result

RESULT CHART

Result	Proceed to
DTC not output	A
DTC output	B

B: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (See DIAGNOSTIC TROUBLE CODE CHART )

A: END