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Check Ignition Switch Circuit

DIAGNOSIS PROCEDURE CHART

Step Check Yes No
1 CHECK IGNITION SWITCH VOLTAGE. 
  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 & Save}.
  5. Check the {BATT voltage} and {IG power supply voltage}.
 Is the {IG power supply voltage} within ±1 V against {BATT voltage}? The ignition switch input circuit is OK. Go to step 2. 
2 CHECK IGNITION SWITCH CIRCUIT. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the harness connector of body integrated unit.
  3. Turn the ignition switch to ON.
  4. Measure the voltage between harness connector terminal and chassis ground.

    Connector & terminal 

    (i84) No. 1 (+) - Chassis ground (-): 

 Is the voltage 10 V or more? Check the body integrated unit. Ref. to BASIC DIAGNOSTIC PROCEDURE . Check the harness for open or short circuit between the body integrated unit and fuse.
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