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Home >> Subaru >> 2016 >> WRX STI Series.HyperBlue >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Security And Locks - Keyless Access (W-Push Button Start) (Diagnostics) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC B1572 IMM Circuit Except Antenna Circuit >> Except For C0 Model >> Wiring Diagram
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Except For C0 Model: Wiring Diagram

Push button start system wiring diagram. Refer to appropriate SYSTEM WIRING DIAGRAMS article.

DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK CURRENT DATA. 
  1. Turn the ignition switch to ON.
  2. Check the keyless access CM (Control Module) data using the Subaru Select Monitor. < Ref. to READ CURRENT DATA . >
  3. Display the next data. "Immobilizer" "Engine start" "Unlock confirmation"

    Data 

    Immobilizer = Unset: 

    Engine start = Engine start permission: 

    Unlock confirmation = Confirmed: 

 Is the data displayed as described above? Go to step 2.  Perform diagnostics with phenomenon. < Ref. to ENGINE DOES NOT START , INSPECTION, Diagnostics with Phenomenon. >
2 CHECK CURRENT DATA. 
Use the Subaru Select Monitor to check the keyless access CM (Control Module) data when holding down the push button ignition switch while depressing the brake pedal (CVT model) or the clutch pedal (MT model). < Ref. to READ CURRENT DATA . >
Data 
EGI code reception status = Reception: 
NOTE: If "Reception" is displayed, the status changes to "Not yet received" in 10 seconds. When performing the check again, perform the check after turning the ignition to OFF.
 Is the data displayed as described above? Go to step 3.  Repair or replace the harness between keyless access CM (Control Module) and ECM.
3 CHECK WIRING HARNESS. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the keyless access CM (Control Module) connector and ECM connector.
  3. Using a tester, measure the resistance between the keyless access CM (Control Module) connector and ECM.

    Connector & terminal 

    Engine type: FA 

    (B572) No. 13 - (E158) No. 43: 

    Engine type: EJ 

    (B572) No. 13 - (B135) No. 25: 

 Is the resistance less than 10 Ω? Go to step 4.  Repair or replace the open circuit of harness.
4 CHECK WIRING HARNESS. 
Using a tester, measure the resistance between the keyless access CM (Control Module) connector and chassis ground.
Connector & terminal 
(B572) No. 11 - Chassis ground: 		 Is the resistance less than 10 Ω? Go to step 5.  Repair or replace the open circuit of harness.
5 CHECK ECM. 
  1. Install the ECM from other normal operating vehicle (with push button start) which use same ECM to the vehicle to be diagnosed.
  2. Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.
 Is ECM registration finished? And does the engine start? Replace the ECM. < Ref. to REMOVAL , Engine Control Module (ECM). > < Ref. to REMOVAL , Engine Control Module (ECM). > Install the ECM from other vehicle to the original vehicle. Replace the keyless access CM (Control Module). < Ref. to KEYLESS ACCESS CM (Control Module) . >
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