FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.

KM16 - Check Wide Open Throttle A/C Cut-Off Cycling

- Enter Output State test mode. Output State Diagnostic Test Mode

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

- Digital Volt/Ohm Meter (DVOM) on 20 volt scale.

- Connect DVOM positive test lead to the VPWR circuit and the negative test lead to the WAC circuit at the WAC relay vehicle harness connector.

- While observing DVOM, depress and release throttle several times (to cycle output on and off).

- Does voltage cycle high and low (about one volt change)?

Yes -- Replace WAC relay. Remove jumper. Re-evaluate symptom.

No -- Remove jumper. Reconnect speed control servo. Go to KM17. KM17 - Check WAC Circuit Continuity