A/T

DTC P0506 - IDLE CONTROL SYSTEM RPM LOWER THAN EXPECTED

DTC DETECTING CONDITION:
- Two consecutive driving cycles with fault

TROUBLE SYMPTOM:
- Engine is difficult to start.
- Engine does not start.
- Erroneous idling
- Engine stalls.

CAUTION: After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE and INSPECTION MODE. Refer to How To Clear Diagnostic Trouble Codes.

Wiring Diagram:

WIRING DIAGRAM

11AT1: CHECK ANY OTHER DTC ON DISPLAY.

CHECK: Does the Subaru Select Monitor or OBD-II general scan tool indicate DTC P1510, P1511, P1512, P1513, P1514, P1515, P1516 or P1517?

YES: Inspect DTC P1510, P1511, P1512, P1513, P1514, P1515, P1516 or P1517 using "11. Diagnostics Chart with Trouble Code for AT Vehicles".

NOTE: In this case, it is not necessary to inspect DTC P0506.

NO: Go to step 11AT2.

11AT2: CHECK AIR BY-PASS LINE.

1. Turn ignition switch to OFF.
2. Remove idle air control solenoid valve from throttle body.
3. Remove throttle body from intake manifold.
4. Using an air gun, force air into idle air control solenoid valve installation area. Confirm that forced air subsequently escapes from throttle body interior.

CHECK: Does air flow out?

YES: Replace idle air control solenoid valve.

NO: Replace throttle body.