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Home >> Subaru >> 2015 >> WRX Limited, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Controls (Diagnostics) (H4DOTC) (STI)) >> Malfunction Indicator Light >> Malfunction Indicator Light Does Not Blink >> Wiring Diagram

Malfunction Indicator Light Does Not Blink: Wiring Diagram

WARNING: This page is about a different variant/trim than selected.
Fig 1: Malfunction Indicator Light - Wiring Diagram (Does Not Blink)
G10265796Courtesy of SUBARU OF AMERICA, INC.
DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK STATUS OF MALFUNCTION INDICATOR LIGHT. 
  1. Turn the ignition switch to OFF.
  2. Make sure that the delivery mode fuse is removed.
  3. Turn the ignition switch to ON. (engine OFF)
Does the malfunction indicator light illuminate? Go to step . Repair the malfunction indicator light circuit. <Ref. to MALFUNCTION INDICATOR LIGHT DOES NOT COME ON , Malfunction Indicator Light.>
2 CHECK HARNESS BETWEEN ECM AND DELIVERY MODE FUSE. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from ECM.
  3. Install the delivery mode fuse.
  4. Measure the resistance of harness between ECM connectors.

    Connector & terminal 

    (B136) No. 34 - (B136) No. 4: 

Is the resistance less than 1 Ω? Go to step 3.  Repair the harness and connector.
NOTE: In this case, repair the following item:

  • Open circuit in harness between ECM connector
  • Poor contact of each connector between ECM connector
3 CHECK FOR POOR CONTACT. 
Check for poor contact of ECM connector.
Is there poor contact of ECM connector? Repair the poor contact of ECM connector. Replace the ECM. <Ref. to ENGINE CONTROL MODULE (ECM) .>