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P0072-AMBIENT AIR TEMPERATURE SENSOR CIRCUIT LOW (CONTINUED) 3. (G31) AAT SIGNAL CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the C2 FCM harness connector. Measure the resistance between ground and the (G31) AAT Signal cir- Is the resistance below 100 ohms? Yes >> Repair the short to ground in the (G31) AAT Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer No >> Go To 4 4. (G31) AAT SIGNAL CIRCUIT SHORTED TO THE (G931) SENSOR GROUND CIRCUIT Measure the resistance between the (G931) Sensor ground circuit and Is the resistance below 5.0 ohms? Yes >> Repair the short between the (G931) Sensor ground circuit and the (G31) AAT Signal circuit. Perform the POWERTRAIN VERIFICATION TEST. (Refer No >> Go To 5 5. FRONT CONTROL MODULE NOTE: Before continuing, check the FCM harness connector terminals for corrosion, damage, or terminal Were there any problems found? Yes >> Repair as necessary. Perform BODY VERIFICATION TEST VER - 1. No >> Replace and program the Front Control Module per Service Information. Perform BODY VERIFICATION TEST VER - 1. 9 - 68 ENGINE ELECTRICAL DIAGNOSTICS WK |