Starter Motor Circuit

CAUTION: After repair or replacement of faulty parts, perform Clear Memory Mode < Refer to OPERATION , CLEAR MEMORY MODE > and Inspection Mode < Refer to PROCEDURE , INSPECTION MODE >.

WIRING DIAGRAM:

Fig 1: Starter Motor - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC CHART

Step	Check	Yes	No
1 CHECK BATTERY. Check the battery voltage.	Is the voltage more than 12 V?	Go to step 2.	Charge or replace the battery.
2 CHECK OPERATION OF STARTER MOTOR.	Does the starter motor operate?	Go to step 3.	Go to step 4 .
3 CHECK DTC.	Is DTC displayed? < Refer to OPERATION , READ DIAGNOSTIC TROUBLE CODE (DTC). >	Check the appropriate DTC using the List of Diagnostic Trouble Code (DTC). < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >	Repair poor contact in ECM connector.
4 CHECK INPUT SIGNAL FOR STARTER MOTOR. Turn the ignition switch to OFF. Disconnect the connector from starter motor. Turn the ignition switch to START. Measure the power supply voltage between starter motor connector terminal and engine ground. Connector & terminal (B14) No. 1 (+) - Engine ground (-): NOTE: Place the select lever in "P" or "N" range.	Is the voltage more than 10 V?	Check the starter motor. < Refer to STARTER . >	Go to step 5 .
5 CHECK HARNESS BETWEEN BATTERY AND IGNITION SWITCH CONNECTOR. Disconnect the connector from ignition switch. Measure the power supply voltage between ignition switch connector and chassis ground. Connector & terminal (B72) No. 3 (+) - Chassis ground (-):	Is the voltage more than 10 V?	Go to step 6.	Repair the open circuit of harness between ignition switch and battery, and check fuse SBF No. 7 and SBF No. 1.
6 CHECK IGNITION SWITCH. Disconnect the connector from ignition switch. Measure the resistance between ignition switch terminals after turning the ignition switch to START position. Terminals No. 2 - No. 3:	Is the resistance less than 5 Ω?	Go to step 7.	Replace the ignition switch.
7 CHECK INPUT VOLTAGE OF STARTER RELAY. Turn the ignition switch to OFF. Disconnect the connector from starter relay. Connect the connector to ignition switch. Measure the input voltage between starter relay connector and chassis ground after turning the ignition switch to START position. Connector & terminal (B225) No. 13 (+) - Chassis ground (-): (B225) No. 15 (+) - Chassis ground (-):	Is the voltage more than 10 V?	Go to step 8.	Repair the open circuit of harness between starter relay and ignition switch.
8 CHECK STARTER RELAY. Connect the battery to starter relay terminals No. 15 and No. 16. Measure the resistance between starter relay terminals. Terminals No. 13 - No. 14:	Is the resistance less than 1 Ω?	Go to step 9.	Replace the starter relay.
9 CHECK INPUT VOLTAGE FROM ECM. Turn the ignition switch to OFF. Connect the connector to starter relay. Disconnect the connectors from ECM. Measure the voltage between ECM and chassis ground. Connector & terminal (B136) No. 32 (+) - Chassis ground (-): (B136) No. 20 (+) - Chassis ground (-):	Is the voltage more than 10 V?	Replace the ECM. < Refer to ENGINE CONTROL MODULE (ECM) . >	Repair the open or ground short circuit of harness between ECM and starter relay.