E22 Freeze Control Switch Short Circuit Freeze control switch short circuit. AH91621,000016F –19–15MAR06–1/1 Harness Diagnostics –1/1 TM2361 (24JUN08) 9001-40-8 450DLC Excavator Operation and Tests 062608 PN=196 Air Conditioner Controller (ACF) Diagnostic Trouble Codes 2 Open Circuit Check Disconnect harness from freeze control switch and air conditioner and heater YES: Freeze control controller. switch malfunction. Check continuity between pins on controller and freeze control switch connector. NO: Repair or replace harness. See Air Is there continuity on the appropriate pins? Conditioner Harness (W6) 9001 Wiring Diagram.
(Group 40 9015-10.) 8 – – –1/1 Air Conditioner Controller (ACF) Diagnostic Trouble Codes 2 Open Circuit Check Disconnect harness from freeze control switch and air conditioner and heater controller. Check continuity between pins on controller and freeze control switch connector. Is there continuity on the appropriate pins? YES: Freeze control switch malfunction. NO: Repair or replace harness. See Air Conditioner Harness (W6) Wiring Diagram. (Group 9015-10.) – – –1/1 9001 40 8 1 Connector Check Check harness connection to freeze control switch 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 freeze control switch 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: Freeze control switch malfunction. – – –1/1