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 -- Go to KM32. KM32 - Cycle A/C Demand Switch

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