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Home >> Subaru >> 2008 >> Forester X, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrumentation System & Driver Information System - Instrumentation - Driver Info >> Combination Meter System >> Wiring Diagram >> Check Engine Control Module (ECM)

Check Engine Control Module (ECM)

DIAGNOSTIC PROCEDURE CHART

Step Check Yes No
1 CHECK ECM SIGNAL. 
  1. Start the engine.
  2. Measure the voltage between ECM connector and engine ground.

    Connector & terminal 

    Non-turbo model 

    (B135) No. 27(+) - Engine ground (-): 

    Turbo model 

    (B135) No. 26 (+) - Engine ground (- ): 

 Is the voltage 0 ← → 14 V? Go to step 2.  Inspect the ECM. <Ref. to BASIC DIAGNOSTIC PROCEDURE . > <Ref. to BASIC DIAGNOSTIC PROCEDURE . >
2 CHECK HARNESS BETWEEN COMBINATION METER AND ECM. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from ECM and combination meter.
  3. Measure the resistance between ECM harness connector and combination meter harness connector.

    Connector & terminal 

    Non-turbo model 

    (B135) No. 27-(i10) No. 12: 

    Turbo model 

    (B135) No. 26 - (i10) No. 12: 

 Is the resistance less than 10 Ω? Check the tachometer. <Ref. to REMOVAL , Tachometer. > Repair the wiring harness.
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