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Communication Line Check

WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use "System Operation Check Mode" to check the communication line between ECM and the body integrated unit. This is called "communication line check".
  1. Connect the Subaru Select Monitor.
  2. On «Main Menu» display, select {Each System Check}.
  3. On «System Selection Menu» display, select {Engine Control System}.
  4. After engine type information is displayed, select [OK].
  5. On «Engine Diagnosis» display, select {System Operation Check Mode}.
  6. On «System Operation Check Mode» display, select {Immobilizer System}.
  7. Start the communication line check.
  8. Is «OK» displayed on screen?

    If displayed, go to step 9  ).

    If not, go to step  10).

  9. After diagnostic results, it is determined that the circuit is not shorted. Finish the communication line check.
  10. If a problem is detected, repair the trouble cause.< Refer to DTC P1572 IMM CIRCUIT FAILURE (EXCEPT ANTENNA CIRCUIT) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
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