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Check Ignition Switch

CAUTION: When the ignition key lock is replaced, all ignition keys also must be registered.
DIAGNOSIS PROCEDURE CHART

Step Check Yes No
1 CHECK IGNITION SWITCH INPUT. 
  1. Prepare the Subaru Select Monitor kit.
  2. Turn the ignition switch to ON (engine OFF) and run the "PC application for Subaru Select Monitor".
  3. On the «System Selection Menu» display, select the {Integ. unit mode}.
  4. Select the {Current Data Display}.
  5. Check the following data display.
 Is the data display 10 V or more (BATT voltage (Control), IG power supply voltage)? Ignition switch is normal. Go to step 2. 
2 CHECK IGNITION SWITCH INPUT. 
  1. Turn the ignition switch to ON.
  2. Measure the voltage between the body integrated unit harness connector and chassis ground.

    Connector & terminal 

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

 Is the voltage 10 V or more? Replace the body integrated unit. Ref. to BODY INTEGRATED UNIT . Go to step 3. 
3 CHECK FUSIBLE LINK. 
Remove the fusible link main SBF and SBF-6 (in main fuse box), and visually check.		 Is the fusible link blown out? Replace the fusible link main SBF or SBF-6. If the replaced fusible link has blown out easily, repair the short circuit between the fusible link and the ignition switch. Go to step 4. 
4 CHECK FOR POWER SUPPLY OF IGNITION SWITCH. 
  1. Disconnect the ignition switch harness connector.
  2. Measure the voltage between harness connector terminal and chassis ground.

    Connector & terminal 

    (B72) No. 3 (+) - Chassis ground (-): 

 Is the voltage 10 V or more? Go to step 5.  Check the harness for open circuits and shorts between the ignition switch and fusible link.
5 CHECK IGNITION SWITCH. 
  1. Insert the ignition key into ignition switch, and turn the each position.
  2. Measure the resistance between ignition switch terminals.

    Connector & terminal 

    No. 3 - No. 5: (ACC position) 

    No. 3 - No. 5 - No. 1 - No. 4 (ON position) 

    No. 3 - No. 1 - No. 4 - No. 2 (ST position) 

 Is the resistance less than 1 Ω when turning the ignition key to each position? Ignition switch is normal. Replace the ignition switch. Ref. to REPLACEMENT , Ignition Key Lock.
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