KM5 - Check WAC Circuit For Short to Ground

- Key "OFF".

- Wide Open Throttle A/C Cut-Off (WAC) relay disconnected.

- Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary. Leave PCM disconnected.

- Measure resistance between WAC circuit at the WAC relay vehicle harness connector and chassis ground.

- Is resistance greater than 10,000 ohms?

Yes -- Go to KM6. KM6 - Check For Voltage at ACCS/ACD Input to PCM

No -- Service short circuit. Reconnect all components. Re-evaluate symptom.