Component Inspection

P0507 Idle Air Control System

RPM higher than expected - Inspection/Repair:_:Component Inspection

Component Inspection

1. ISCA visual check
(1) Key "OFF".
(2) Disconnect ISCA connector.
(3) Check contamination, damage or stuck on ISCA.
(4) Check the operating sound when key turns "OFF" to "ON".
(5) Is ISCA O.K?
YES
1) Go to "ISCA check" procedure.
NO
1) Substitute with a known - good ISCA and check for proper operation.
If the problem is corrected, replace ISCA and go to "Verification of Vehicle Repair" procedure.
2. ISCA check
(1) Key "OFF".
(2) Disassemble ISCA.
(3) Measure the resistance between terminal 1 and 2 of ISCA harness connector. (Component side)
(4) Measure the resistance between terminal 2 and 3 of ISCA harness connector. (Component side)
A. Specification :









(5) Is the measured resistance within specifications?
YES
1) Substitute with a known - good ECM and check for proper operation.
If the problem is corrected, replace ECM and go to "Verification of Vehicle Repair" procedure.

CAUTION:
There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM.
Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others

NO
1) Substitute with a known - good ISCA and check for proper operation.
If the problem is corrected, replace ISCA and go to "Verification of Vehicle Repair" procedure.