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Home >> Subaru >> 2006 >> Baja Turbo, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Controls - Engine (Diagnostics) (H4SO)) >> Diagnostics for Engine Starting Failure >> Starter Motor Circuit

Starter Motor Circuit

WARNING: This page is about a different variant/trim than selected.
CAUTION: After repair or replacement of malfunctioning parts, conduct CLEAR MEMORY MODE < Ref. to CLEAR MEMORY MODE  > and INSPECTION MODE < Ref. to INSPECTION MODE . >
DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK OPERATION OF STARTER MOTOR.  Does the starter motor operates, when turning the ignition switch START? Go to step 2.  Go to step 3. 
2 CHECK DTC.  Is DTC displayed? Check DTC using "List of Diagnostic Trouble Code (DTC)". < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > Repair poor contact in ECM connector.
3 CHECK INPUT SIGNAL FOR STARTER MOTOR. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from starter motor.
  3. Turn the ignition switch to ST.
  4. Measure the 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.
  • On MT vehicles, depress the clutch pedal.
 Is the measured value more than 10 V? Go to step 4.  Go to step 5. 
4 CHECK GROUND CIRCUIT OF STARTER MOTOR. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the terminal from starter motor.
  3. Measure the resistance of ground cable between ground cable terminal and engine ground.
 Is the measured value less than 5 Ω? Check the starter motor. < Ref. to STARTER . > Repair open circuit of ground cable.
5 CHECK HARNESS BETWEEN BATTERY AND IGNITION SWITCH CONNECTOR. 
  1. Disconnect the connector from ignition switch.
  2. Measure the power supply voltage between ignition switch connector and chassis ground.

    Connector & terminal 

    (B72) No. 1 (+) - Chassis ground (-): 

 Is the measured value more than 10 V? Go to step 6.  Repair open circuit in harness between ignition switch and battery, and check fuse SBF No. 4 and SBF No. 1.
6 CHECK IGNITION SWITCH. 
  1. Disconnect the connector from ignition switch.
  2. Measure the resistance between ignition switch terminals while turning ignition switch to the "ST" position.

    Terminals No. 1 - No. 3: 

 Is the measured value less than 5 Ω? Go to step 7.  Replace the ignition switch.
7 CHECK TRANSMISSION TYPE.  Is the target AT vehicle? Go to step 8.  Go to step 10. 
8 CHECK INPUT VOLTAGE OF INHIBITOR SWITCH. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from inhibitor switch.
  3. Connect the connector to ignition switch.
  4. Measure the input voltage between inhibitor switch connector terminal and engine ground while turning ignition switch to ST.

    Connector & terminal 

    (B12) No. 12 (+) - Engine ground (-): 

 Is the measured value more than 10 V? Go to step 9.  Repair open or ground short circuit in harness between inhibitor switch and ignition switch.
NOTE: Check security system (if equipped). < Ref. to INSPECTION , SECURITY SYSTEM. >
9 CHECK INHIBITOR SWITCH. 
  1. Place the selector lever in the "P" or "N" position.
  2. Measure the resistance between inhibitor switch terminals.

    Connector & terminal 

    (T3) No. 11 - No. 12: 

 Is the measured value less than 1 Ω? Repair open or ground short circuit in harness between inhibitor switch and starter motor. Replace the inhibitor switch. < Ref. to REMOVAL , INHIBITOR SWITCH. >
10 CHECK INPUT VOLTAGE OF STARTER INTERLOCK RELAY. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from starter interlock relay.
  3. Connect the connector to ignition switch.
  4. Measure the input voltage between starter interlock relay connector and chassis ground while turning ignition switch to ST.

    Connector & terminal 

    (BIOS) No. 1 (+) - Chassis ground (-): 

    (BIOS) No. 3 (+) - Chassis ground (-): 

 Is the measured value more than 10 V? Go to step 11  . Repair open or ground short circuit in harness between starter interlock relay and ignition switch.
NOTE: Check security system (if equipped). < Ref. to INSPECTION , SECURITY SYSTEM. >
11 CHECK STARTER INTERLOCK RELAY. 
  1. Connect the battery to starter interlock relay terminals No. 3 and No. 2.
  2. Measure the resistance between starter interlock relay terminals.

    Terminals No. 4 - No. 1: 

 Is the measured value less than 1 Ω? Go to step 12  . Replace the starter interlock relay.
12 CHECK GROUND CIRCUIT OF CLUTCH SWITCH. 
  1. Disconnect the connector from clutch switch.
  2. Measure the resistance between clutch switch connector and chassis ground.

    Connector & terminal 

    (B106) No. 1 - Chassis ground: 

 Is the measured value less than 1 Ω? Go to step 13  . Repair open circuit of ground cable.
13 CHECK CLUTCH SWITCH. 
  1. Measure the resistance between clutch switch terminal while depressing the clutch pedal.

    Terminals No. 1 - No. 2: 

 Is the measured value less than 1 Ω? Go to step 14  . Replace the clutch switch. < Ref. to REMOVAL , CLUTCH SWITCH. >
14 CHECK CLUTCH SWITCH CIRCUIT. 
  1. Connect the connector to clutch switch.
  2. Measure the resistance between starter interlock relay connector and chassis ground while depressing the clutch pedal.

    Connector & terminal 

    (B105) No. 2 - Chassis ground: 

 Is the measured value less than 1 Ω? Repair ground short circuit in harness between starter interlock relay and starter motor. Repair open circuit in harness between starter interlock relay and clutch switch.
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