Air Conditioner Controller (ACF) Diagnostic Trouble Codes E16 Coolant Temperature Sensor Short Circuit Coolant temperature sensor short circuit. AH91621,000016C –19–15MAR06–1/1 Harness Diagnostics –1/1 TM2361 (24JUN08) 9001-40-5 450DLC Excavator Operation and Tests 062608 PN=193 2 Open Circuit Check Disconnect harness from coolant temperature sensor and air conditioner and heater controller. Check continuity between pins on controller and coolant temperature sensor connector. Is there continuity on the appropriate pins? YES: Coolant temperature sensor malfunction. NO: Repair or replace harness. See Air Conditioner Harness (W6) Wiring Diagram.
(Group 9015-10.) – – –1/1 9001 40 5 1 Connector Check Check harness connection to coolant 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 Short Circuit Check. NO: Repair or replace connector or pins. – – –1/1 2 Short Circuit Check Disconnect harness from coolant temperature sensor and air conditioner and heater controller. Check continuity between appropriate pins on air conditioner and heater controller connector and machine ground. Is there continuity to ground? YES: Repair or replace harness. See Air Conditioner Harness (W6) Wiring Diagram. (Group 9015-10.) NO:
Coolant temperature sensor malfunction. – – –1/1