Subaru Select Monitor: Operation: General Description

The on-board diagnosis function of the cruise control system uses Subaru Select Monitor. The on-board diagnosis function operates in two categories, which are used depending on the type of problems;

1. Cruise Control Cancel Conditions Diagnosis:
   1. This category of diagnosis requires actual vehicle driving in order to determine the cause, as when cruise speed is cancelled during driving although cruise cancel condition is not entered.
   2. Cruise control memory in ECM stores the cancel code which occurred during driving. When there are multiple cancel code, they are shown on the Subaru Select Monitor.
      CAUTION:

      • The cruise control memory stores not only the cruise "cancel" which occurred (although "cancel" operation is not entered by the driver), but also the "cancel" condition input by the driver.
      • The latest memory content (latest code) is cleared when ignition switch is turned to OFF. However, the content of memory for troubleshooting switches related to the system or cruise control, is stored as a diagnostic history (memory code) even after the ignition switch has been turned to OFF.
2. Real-time Diagnosis:

   Real-time diagnosis function is used to determine whether or not the input signal system is in good order, according to signal emitted from switches, sensors, etc.

   1. Vehicle cannot be driven at cruise speed when the problem occurs in the cruise control system or relevant circuits.
   2. Monitor the signal conditions from switches and sensors.