Check Engine Control Module (ECM)

CHECK STEP FOR ENGINE CONTROL MODULE

Step	Check	Yes	No
1 CHECK ECM SIGNAL. Start the engine. Measure the voltage between ECM connector and engine ground. Connector & terminal (B136) No. 22 (+) - Chassis ground (-):	Is the voltage 0 ↔ 14 V or more?	Go to step 2.	Inspect the ECM. <Ref. to BASIC DIAGNOSTIC PROCEDURE .> or <Ref. to BASIC DIAGNOSTIC PROCEDURE .> or refer to "EN(STI) Section".
2 CHECK HARNESS BETWEEN COMBINATION METER AND ECM. Turn the ignition switch to OFF. Disconnect the connector from ECM and combination meter. Measure the resistance between ECM harness connector and combination meter harness connector. Connector & terminal (B136) No. 22 - (i11) No. 5:	Is the resistance less than 10 Ω?	Except for STI model: Check the tachometer. <Ref. to REMOVAL , TACHOMETER.> STI model: Replace the meter main assembly.	Repair the wiring harness.

Step

Check

Yes

1 CHECK ECM SIGNAL.

Connector & terminal

(B136) No. 22 (+) - Chassis ground (-):

Is the voltage 0 ↔ 14 V or more?

Go to step 2.

Inspect the ECM. <Ref. to BASIC DIAGNOSTIC PROCEDURE .> or <Ref. to BASIC DIAGNOSTIC PROCEDURE .> or refer to "EN(STI) Section".

2 CHECK HARNESS BETWEEN COMBINATION METER AND ECM.

Turn the ignition switch to OFF.
Disconnect the connector from ECM and combination meter.
Measure the resistance between ECM harness connector and combination meter harness connector.

Connector & terminal

(B136) No. 22 - (i11) No. 5:

Is the resistance less than 10 Ω?

Except for STI model: Check the tachometer. <Ref. to REMOVAL , TACHOMETER.> STI model: Replace the meter main assembly.

Repair the wiring harness.