No.	Step	Check	Yes	No
	1	CHECK OPERATION OF STARTER MOTOR.	Does starter motor operate when the switch starts?	Go to step 2.	Go to step 3.
	2	CHECK DTC. <Ref. to EN(DOHC TURBO)-43, OPERATION, Read Diagnostic Trouble Code.>	Is the trouble code stored in memory? <Ref. to EN(DOHC TURBO)-82, LIST, List of Diagnostic Trouble Code (DTC).>	Record DTC. Repair the trouble case. <Ref. to EN(DOHC TURBO)-90, Diag­nostic Procedure with Diagnostic Trouble Code (DTC).>	Go to step 3.
	3	CHECK INPUT SIGNAL FOR STARTER MOTOR. 1) Turn ignition switch to OFF. 2) Disconnect connector from starter motor. 3) Turn ignition switch to ST. 4) Measure power supply voltage between starter motor connector terminal and engine ground. Connector & terminal (B14) No. 1 (+) — Engine ground (-): NOTE: On AT vehicles, place the selector lever in the "P" or "N" position.	Is the voltage more than 10 V?	Go to step 4.	Go to step 5.
	4	CHECK GROUND CIRCUIT OF STARTER MOTOR. 1) Turn ignition switch to OFF. 2) Disconnect terminal from starter motor. 3) Measure resistance of ground cable between ground cable terminal and engine ground.	Is resistance less than 5 Q?	Check starter motor. <Ref. to SC-5, Starter.>	Repair open cir­cuit of ground cable.
	5	CHECK HARNESS BETWEEN ECM AND STARTER MOTOR CIRCUIT. 1) Turn ignition switch to OFF. 2) Measure resistance between starter motor and ECM. Connector & terminal (B14) No. 1 — Engine ground:	Is resistance less than 1 Q?	Repair ground short circuit.	Go to step 6.
	6	CHECK HARNESS BETWEEN ECM AND STARTER MOTOR CIRCUIT. 1) Turn ignition switch to START. 2) Measure resistance of fuse. Connector & terminal (B14) No. 1 — Engine ground:	Is resistance less than 1 Q?	Go to step 7.	Repair ground short circuit.
	7	CHECK HARNESS BETWEEN BATTERY AND IGNITION SWITCH CONNECTOR. 1) Ignition switch to OFF. 2) Disconnect connector from ignition switch. 3) Measure power supply voltage between ignition switch connector and chassis ground. Connector & terminal (B72) No. 1 (+) — Chassis ground (-):	Is the voltage more than 10 V?	Go to step 8.	Repair open cir­cuit in harness between ignition switch and bat­tery.
	8	CHECK HARNESS BETWEEN BATTERY AND IGNITION SWITCH CONNECTOR. 1) Connect connector to ignition switch. 2) Turn ignition switch to START. 3) Measure voltage between ignition switch and chassis ground. Connector & terminal (B72) No. 3 (+) — Chassis ground (-):	Is the voltage more than 10 V?	Go to step 9.	Replace ignition switch.

	No.	Step	Check	Yes	No
	9	CHECK TRANSMISSION TYPE.	Is the vehicle AT?	Go to step 10.	Repair open cir-
					cuit between igni-
					tion switch and
					starter motor cir-
					cuit.
	10	CHECK INHIBITOR SWITCH CIRCUIT.	Is the resistance less than	Repair open cir-	Go to step 11.
		1) Turn ignition switch to OFF.	1 Q?	cuit in harness
		2) Place the selector lever in the "P" or "N"		between starter
		position.		motor and ignition
		3) Separate transmission harness connector.		switch connector.
		4) Measure resistance between transmission
		harness connector receptacle's terminals.
		Connector & terminal
		(T3) No. 11 — No. 12:
	11	CHECK TRANSMISSION HARNESS.	Is the resistance less than	Go to step 12.	Repair open cir-
		1) Disconnect connector from inhibitor switch.	1 Q?		cuit in harness
		2) Measure resistance of harness between			between transmis-
		transmission harness and inhibitor switch con-			sion harness and
		nector.			inhibitor switch
		Connector & terminal			connector.
		(T3) No. 11 — (T7) No. 1:
	12	CHECK POOR CONTACT.	Is there poor contact in	Repair poor con-	Replace inhibitor
		Check poor contact in inhibitor switch connect	inhibitor switch connector?	tact in inhibitor	switch.
		tor.		switch connector.

	No.	Step	Check	Yes	No
	1	CHECK MAIN RELAY. 1) Turn the ignition switch to OFF. 2) Remove main relay. 3) Connect battery to main relay terminals No. 1 and No. 2. 4) Measure resistance between main relay terminals. Terminals No. 3 — No. 5: No. 4 — No. 6:	Is the resistance less than 10 Q?	Go to step 2.	Replace main relay.
	2	CHECK GROUND CIRCUIT OF ECM. 1) Disconnect connector from ECM. 2) Measure resistance of harness between ECM and chassis ground. Connector & terminal (B134) No. 7 — Chassis ground: (B134) No. 15 — Chassis ground: (B134) No. 22 — Chassis ground: (B136) No. 8 — Chassis ground: (B136) No. 17— Chassis ground: (B136) No. 18 — Chassis ground: (B137) No. 8 — Chassis ground: (B137) No. 9 — Chassis ground: (B84) No. 1 — Chassis ground: (MT model)	Is the resistance less than 5Q?	Go to step 3.	Repair open cir­cuit in harness between ECM connector and engine grounding terminal.
	3	CHECK INPUT VOLTAGE OF ECM. Measure voltage between ECM connector and chassis ground. Connector & terminal (B137) No. 10 (+) — Chassis ground (B134) No. 14 (+) — Chassis ground	Is the voltage more than 10 V?	Go to step 4.	Repair open or ground short cir­cuit of power sup­ply circuit.
	4	CHECK HARNESS BETWEEN ECM AND MAIN RELAY CONNECTOR. 1) Turn ignition switch to OFF. 2) Measure resistance between ECM and chassis ground. Connector & terminal (B134) No. 2 — Chassis ground:	Is the resistance more than 1 MQ?	Go to step 5.	Repair ground short circuit in harness between ECM connector and main relay connector, then replace ECM.
	5	CHECK OUTPUT VOLTAGE FROM ECM. 1) Connect connector to ECM. 2) Turn ignition switch to ON. 3) Measure voltage between ECM connector and chassis ground. Connector & terminal (B134) No. 2 (+) — Chassis ground (-):	Is the voltage more than 10 V?	Go to step 6.	Replace ECM. <Ref. to FU(DOHC TURBO)-47, Engine Control Module.>
	6	CHECK INPUT VOLTAGE OF MAIN RELAY. Check voltage between main relay connector and chassis ground. Connector & terminal (B47) No. 2 (+) — Chassis ground (-):	Is the voltage more than 10 V?	Go to step 7.	Repair open cir­cuit in harness between ECM connector and main relay con­nector.
	7	CHECK GROUND CIRCUIT OF MAIN RELAY. 1) Turn ignition switch to OFF. 2) Measure resistance between main relay connector and chassis ground. Connector & terminal (B47) No. 1 — Chassis ground:	Is the resistance less than 5Q?	Go to step 8.	Repair open cir­cuit between main relay and chassis ground.

	No.	Step	Check	Yes	No
	8	CHECK INPUT VOLTAGE OF MAIN RELAY. Measure voltage between main relay connec­tor and chassis ground. Connector & terminal (B47) No. 5 (+) — Chassis ground (-): (B47) No. 6 (+) — Chassis ground (-):	Is the voltage more than 10 V?	Go to step 9.	Repair open or ground short cir­cuit in harness of power supply cir­cuit.
	9	CHECK INPUT VOLTAGE OF ECM. 1) Connect main relay connector. 2) Turn ignition switch to ON. 3) Measure voltage between ECM connector and chassis ground. Connector & terminal (B137) No. 2 (+) — Chassis ground (-): (B137) No. 3 (+) — Chassis ground (-):	Is the voltage more than 10 V?	Check ignition control system. <Ref. to EN(DOHC TURBO)-72, IGNI­TION CONTROL SYSTEM, Diag­nostics for Engine Starting Failure.>	Repair open or ground short cir­cuit in harness between ECM connector and main relay con­nector.

	No.	Step	Check	Yes	No
	1	CHECK SPARK PLUG CONDITION. 1) Remove spark plug. <Ref. to IG(DOHC TURBO)-4, Spark Plug.> 2) Check spark plug condition. <Ref. to IG(DOHC TURBO)-4, Spark Plug.>	Is spark plug's status OK?	Go to step 2.	Replace spark plug
	2	CHECK IGNITION SYSTEM FOR SPARKS. 1) Connect spark plug to ignition coil. 2) Release fuel pressure. <Ref. to FU(DOHC TURBO)-50, RELEASING OF FUEL PRESSURE, OPERATION, Fuel.> 3) Contact spark plug's thread portion on engine. 4) While opening throttle valve fully, crank engine to check that spark occurs at each cylinder.	Does spark occur at each cylinder?	Check fuel pump system. <Ref. to EN(DOHC TURBO)-76, FUEL PUMP CIRCUIT, Diag­nostics for Engine Starting Failure.>	Go to step 3.

	No.	Step	Check	Yes	No
	3	CHECK POWER SUPPLY CIRCUIT FOR IGNITION COIL & IGNITOR ASSEMBLY. 1) Turn ignition switch to OFF. 2) Disconnect connector from ignition coil & ignitor assembly. 3) Turn ignition switch to ON. 4) Measure power supply voltage between ignition coil & ignitor assembly connector and engine ground. Connector & terminal (E31) No. 3 (+) — Engine ground (-): (E32) No. 3 (+) — Engine ground (-): (E33) No. 3 (+) — Engine ground (-): (E34) No. 3 (+) — Engine ground (-):	Is the voltage more than 10 V?	Go to step 4.	Repair harness and connector. NOTE: In this case, repair the follow­ing: • Open circuit in harness between ignition coil & igni­tor assembly, and ignition switch connector • Poor contact in coupling connec­tors
	4	CHECK HARNESS OF IGNITION COIL & IGNITOR ASSEMBLY GROUND CIRCUIT. 1) Turn ignition switch to OFF. 2) Measure resistance between ignition coil & ignitor assembly connector and engine ground. Connector & terminal (E31) No. 2 — Engine ground: (E32) No. 2 — Engine ground: (E33) No. 2 — Engine ground: (E34) No. 2 — Engine ground:	Is the resistance between less than 5 Q?	Go to step 5.	Repair harness and connector. NOTE: In this case, repair the follow­ing: • Open circuit in harness between ignition coil & igni­tor assembly con­nector and engine grounding termi­nal
	5	CHECK HARNESS BETWEEN ECM AND IGNITION COIL & IGNITOR ASSEMBLY CONNECTOR. 1) Turn ignition switch to OFF. 2) Disconnect connector from ECM. 3) Disconnect connector from ignition coil & ignitor assembly. 4) Measure resistance of harness between ECM and ignition coil & ignitor assembly con­nector. Connector & terminal (B136) No. 21 — (E34) No. 1: (B136) No. 22 — (E33) No. 1: (B136) No. 23 — (E32) No. 1: (B136) No. 24 — (E31) No. 1:	Is the resistance less than 1 Q?	Go to step 6.	Repair harness and connector. NOTE: In this case, repair the follow­ing: • Open circuit in harness between ECM and ignition coil & ignitor assembly connec­tor • Poor contact in coupling connec­tor
	6	CHECK HARNESS BETWEEN ECM AND IGNITION COIL & IGNITOR ASSEMBLY CONNECTOR. Measure resistance of harness between ECM and engine ground. Connector & terminal: (B136) No. 21 — Engine ground: (B136) No. 22 — Engine ground: (B136) No. 23 — Engine ground: (B136) No. 24 — Engine ground:	Is the resistance more than 1 MQ?	Go to step 7.	Repair ground short circuit in harness between ECM and ignition coil & ignitor assembly connec­tor.
	7	CHECK POOR CONTACT. Check poor contact in ECM connector.	Is there poor contact in ECM connector?	Repair poor con­tact in ECM con­nector.	Replace ignition coil and ignitor assembly.

	No.	Step	Check	Yes	No
	1	CHECK OPERATING SOUND OF FUEL	Does fuel pump produce	Check fuel injec-	Record DTC.
		PUMP.	operating sound?	tor circuit. <Ref. to	Repair the trouble
		Make sure that fuel pump is in operation for		EN(DOHC	case. <Ref. to
		two seconds when turning ignition switch to		TURBO)-78,	EN(DOHC
		ON.		FUEL INJECTOR	TURBO)-90, Diag-
		NOTE:		CIRCUIT, Diag-	nostic Procedure
		Fuel pump operation can also be executed		nostics for Engine	with Diagnostic
		using Subaru Select Monitor (Function mode:		Starting Failure.>	Trouble Code
		FD01).			(DTC).>
		For the procedure, refer to "Compulsory Valve
		Operation Check Mode". <Ref. to EN(DOHC
		TURBO)-48, Compulsory Valve Operation
		Check Mode.>

	No.	Step	Check	Yes	No
	1	CHECK OPERATION OF EACH FUEL	Is the fuel injector emits	Check fuel pres-	Go to step 2.
		INJECTOR.	"operating" sound?	sure. <Ref. to
		While cranking the engine, check that each		ME(DOHC
		fuel injector emits "operating" sound. Use a		TURBO)-27,
		sound scope or attach a screwdriver to injec-		INSPECTION,
		tor for this check.		Fuel Pressure.>

	No.	Step	Check	Yes	No
	2	CHECK POWER SUPPLY TO EACH FUEL	Is the voltage more than 10	Go to step 3.	Repair harness
		INJECTOR.	V?		and connector.
		1) Turn ignition switch to OFF.			NOTE:
		2) Disconnect connector from #1 cylinder fuel			In this case,
		injector.			repair the follow-
		3) Turn ignition switch to ON.			ing:
		4) Measure power supply voltage between the			• Open circuit in
		fuel injector terminal and engine ground.			harness between
		Connector & terminal			main relay and
		#1 (E5) No. 2 (+) — Engine ground (-):			fuel injector con-
		#2 (E16) No. 2 (+) — Engine ground			nector
					• Poor contact in
		#3 (E6) No. 2 (+) — Engine ground (-):			main relay con-
		#4 (E17) No. 2 (+) — Engine ground			nector
					• Poor contact in
					coupling connec-
					tor
					• Poor contact in
					fuel injector con-
					nector
	3	CHECK HARNESS BETWEEN ECM AND	Is the resistance less than	Go to step 4.	Repair harness
		FUEL INJECTOR CONNECTOR.	1 Q?		and connector.
		1) Disconnect connector from ECM.			NOTE:
		2) Measure resistance of harness between			In this case,
		ECM and fuel injector connector.			repair the follow-
		Connector & terminal			ing:
		(B137) No. 1 — (E5) No. 1:			• Open circuit in
		(B136) No. 6 — (E16) No. 1:			harness between
		(B136) No. 5 — (E6) No. 1:			ECM and fuel
		(B136) No. 4 — (E6) No. 1:			injector connector
					• Poor contact in
					coupling connec-
					tor
	4	CHECK HARNESS BETWEEN ECM AND	Is the resistance less than	Repair ground	Go to step 5.
		FUEL INJECTOR CONNECTOR.	1 Q?	short circuit in
		Measure resistance of harness between ECM		harness between
		and fuel injector connector.		ECM and fuel
		Connector & terminal		injector connector.
		(B137) No. 1 — Chassis ground:
		(B136) No. 6 — Chassis ground:
		(B136) No. 5 — Chassis ground:
		(B136) No. 4 — Chassis ground:
	5	CHECK EACH FUEL INJECTOR.	Is the resistance between 5	Go to step 6.	Replace faulty
		1) Turn ignition switch to OFF.	and 20 Q?		fuel injector.
		2) Measure resistance between each fuel
		injector terminals.
		Terminals
		No. 1 — No. 2:
	6	CHECK POOR CONTACT.	Is there poor contact in	Repair poor con-	Inspection using
		Check poor contact in ECM connector.	ECM connector?	tact in ECM con-	"General Diagnos-
				nector.	tic Table". <Ref. to
					EN(DOHC
					TURBO)-344,
					INSPECTION,
					General Diagnos-
					tic Table.>