Test GG - A/C Cut-Out (WAC)
- Use only DVOM, not diagnostic tester, for this step. Turn key off and wait 10 seconds. Set DVOM on 20-volt scale. Connect DVOM negative test lead to STO at SELF-TEST connector and positive test lead to positive battery terminal. Install a jumper wire between STI and signal return at SELF-TEST connector. Perform KEY ON/ENGINE OFF (KOEO) SELF-TEST until end of CONTINUOUS SELF-TEST codes (DVOM reads zero volts). Depress and release throttle while watching DVOM reading. If reading did not change to a high voltage, depress throttle to WOT position and release. If STO voltage does not go to high reading, go to TEST PP - NO CODES/CODES NOT LISTED , step 12). Leave test equipment hooked up. If reading changes to high voltage, remain in OUTPUT STATE CHECK and go to next step.
- Turn key on, leaving engine off. Disconnect ECA 60-pin connector. Inspect for and repair any damaged wiring. Install breakout box and connect ECA to box. Place A/C switch on A/C position and set DVOM on 20-volt scale. Connect DVOM positive test lead to test pin No. 37 and negative test lead to test pin No. 54. Depress and release throttle several times while watching DVOM. If A/C clutch output cycles, EEC system is okay. Check A/C system operation. If A/C clutch output does not cycle, remove jumper wire and go to next step.
- Turn key off and wait 10 seconds. Set DVOM on 200-ohm scale. Measure resistance between fan control module connector and battery ground. If reading is 5 ohms or more, repair harness and repeat QUICK TEST . If reading is less than 5 ohms, go to next step.
- Turn key on, leaving engine off. Set DVOM on 20-volt scale. Measure voltage between ignition circuit and ground circuit on fan control module connector. If reading is less than 10.5 volts, repair open in ignition circuit and repeat QUICK TEST . If reading is 10.5 volts or more, go to next step.
- Turn key off and wait 10 seconds. Disconnect ECA 60-pin connector. Inspect for and repair any damaged wiring. Install breakout box, leaving ECA disconnected. Set DVOM on 200-ohm scale. Measure resistance between test pin No. 54 and WAC circuit at fan control module connector. If reading is 5 ohms or more, repair WAC circuit and repeat QUICK TEST . If reading is less than 5 ohms, go to next step.
- Turn key off and wait 10 seconds. Leave breakout box installed and ECA disconnected. Set DVOM on 200,000-ohm scale. Measure resistance between test pin No. 54 and test pins No. 40, 46, and 60. If reading is 10,000 ohms or more, replace ECA and repeat QUICK TEST . If reading is less than 10,000 ohms, go to next step.
- Turn key off and wait 10 seconds. Leave breakout box installed and ECA disconnected. Disconnect fan control module. Set DVOM on 200,000-ohm scale. Measure resistance between test pin No. 54 and test pins No. 40, 46, and 60. If all readings are 10,000 ohms or more, replace fan control module and repeat QUICK TEST . If any reading is less than 10,000 ohms, repair short in harness and repeat QUICK TEST .