KM30 - Check A/C Input Circuitry

- A/C demand switch to "A/C ON".

- Perform Key On Engine Off Self-Test. Quick Test Appendix (Detailed Testing Instructions)

- Is Diagnostic Trouble Code (DTC) 67 or 79/539 present?

Yes -- The Powertrain Control Module (PCM) is receiving and recognizing the A/C input on Pin 10. Return to Diagnostic Routines for other possible causes of a low idle. Symptom Related Diagnostic Procedures

No -- A/C demand switch "OFF". Go to KM31. KM31 - Check A/C Input Circuit