E14 Ambient Air Temperature Sensor Short Circuit Ambient air temperature sensor short circuit. AH91621,000016A –19–15MAR06–1/1 Harness Diagnostics –1/1 TM2361 (24JUN08) 9001-40-3 450DLC Excavator Operation and Tests 062608 PN=191 Air Conditioner Controller (ACF) Diagnostic Trouble Codes Harness Diagnostics – – –1/1 9001 40 3 1 Connector Check Check harness connection to ambient air temperature sensor and air conditioner and heater controller. Are connectors clean and free from debris? Are pins straight and do they make a good connection? YES: Go to Open Circuit Check. NO: Repair or replace connector or pins.
– – –1/1 2 Open Circuit Check Disconnect harness from ambient air temperature sensor and air conditioner and heater controller. Check continuity between pins on controller and ambient air temperature sensor connector. Is there continuity on the appropriate pins? YES: Ambient air temperature sensor malfunction. NO: Repair or replace harness. See Cab Harness (W1) Wiring Diagram, see Machine Harness (W2) Wiring Diagram, see Engine Interface Harness (W5) Wiring Diagram, and See Air Conditioner Harness (W6) Wiring Diagram. (Group 9015-10.) – – –1/1