Toyota
Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » P0507 ISC system
DTC Logic

DTC DETECTION LOGIC

NOTE: If DTC P0507 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0507 ISC SYSTEM (Idle speed control system RPM higher than expected) The idle speed is more than the target idle speed by 200 rpm or more.
  • Electric throttle control actuator
  • Intake air leak
  • PCV system

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Turn ignition switch ON.
  3. Turn ignition switch OFF and wait at least 10 seconds.

If the target idle speed is out of the specified value, perform EC, "Work Procedure", before conducting DTC Confirmation Procedure.

TESTING CONDITION:

  • Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
  • Always perform the test at a temperature above −10C (14F).

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

  1. Start engine and warm it up to normal operating temperature.
  2. Turn ignition switch OFF and wait at least 10 seconds.
  3. Start engine and run it for at least 1 minute at idle speed.
  4. Check 1st trip DTC.

Is 1st trip DTC detected?

YES >> Proceed to EC, "Diagnosis Procedure".

NO >> INSPECTION END

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