Check Engine Control Module (ECM)

Step	Check	Yes	No
1 CHECK ECM SIGNAL. Start the engine. Measure the voltage between ECM connector and chassis ground. Connector & terminal (B135) No. 15 (+) - Chassis ground (-):	Is the voltage 0 ↔ 14 V or more?	Go to step 2.	Inspect the ECM. H4 non-turbo model: Refer to BASIC DIAGNOSTIC PROCEDURE . H4 turbo model: Refer to BASIC DIAGNOSTIC PROCEDURE . H6 model: Refer to BASIC DIAGNOSTIC PROCEDURE .
2 CHECK HARNESS BETWEEN COMBINATION METER AND ECM. Turn the ignition switch to OFF. Disconnect the ECM connector and combination meter connector. Measure the resistance between the ECM connector and the combination meter connector. Connector & terminal (B135) No. 15 - (i10) No. 30:	Is the resistance less than 10 Ω?	Replace the meter case assembly.	Repair or replace the harness.