DTC P0606 Control Module Processor: Wiring Diagram

Engine Electrical System ENGINE TYPE FA (WITHOUT PUSH BUTTON START) <Ref. to 2.0L TURBO (WITHOUT PUSH BUTTON START), WIRING DIAGRAM, Engine Electrical System.>
Engine Electrical System ENGINE TYPE FA (WITH PUSH BUTTON START) <Ref. to 2.0L TURBO (WITH PUSH BUTTON START), WIRING DIAGRAM, Engine Electrical System.>

Fig 1: Control Module Processor Circuit Diagram
Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK INPUT VOLTAGE OF ECM . Turn the ignition switch to ON. Measure the voltage between ECM connector and engine ground. Connector & terminal (B134) No. 12 (+) - Engine ground (-): (B134) No. 24 (+) - Engine ground (-):	Is the voltage 10 - 13 V?	Go to step 2 .	Repair the open or ground short circuit of power supply circuit.
2 CHECK INPUT VOLTAGE OF ECM . Start the engine. Measure the voltage between ECM connector and engine ground. Connector & terminal (B134) No. 12 (+) - Engine ground (-): (B134) No. 24 (+) - Engine ground (-):	Is the voltage 13 - 15 V?	Go to step 3 .	Repair the open or ground short circuit of power supply circuit.
3 CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL CONNECTOR . Turn the ignition switch to OFF. Disconnect the connectors from ECM and electronic throttle control. Measure the resistance of harness between ECM connector and electronic throttle control connector. Connector & terminal E-150 No. 18 - E150 No. 2: E-150 No. 30 - E150 No. 3:	Is the resistance less than 1 Ω?	Go to step 4 .	Repair the open circuit of harness between ECM connector and electronic throttle control connector.
4 CHECK ECM GROUND HARNESS . Connect all connectors. Turn the ignition to ON. Measure the voltage between ECM connector and engine ground. Connector & terminal (B134) No. 35 (+) - Engine ground (-): (B134) No. 47 (+) - Engine ground (-): (E159) No. 10 (+) - Engine ground (-): (E159) No. 17 (+) - Engine ground (-): (E159) No. 18 (+) - Engine ground (-): (E159) No. 25 (+) - Engine ground (-): (E159) No. 26 (+) - Engine ground (-):	Is the voltage less than 1 V?	Check the connector for poor contact and check the harness. Replace the ECM if no fault is found. <Ref. to ENGINE CONTROL MODULE (ECM) .>	Repair the harness and connector. NOTE: In this case, repair the following item: Open circuit in ground circuit Loose engine ground terminal Poor contact of coupling connector