Basic Diagnostic Chart

If no trouble codes appear in the on-board diagnostics operation (although problems have occurred or are occurring), measure performance characteristics of sensors, actuators, etc., in the Subaru Select Monitor and compare with the "basic data" to determine the cause of problems.

1. Trouble occurs.
2. No trouble codes appear in on-board diagnostics operation.
3. Measure each item using Subaru Select Monitor.
4. Compare measured values with basic data.
5. Determine item which is outside basic data specifications.
6. Check sensor and actuator affected.