Trouble Shooting
- Perform QUICK TEST to retrieve any cooling fan related codes. During QUICK TEST, 3 types of diagnostic trouble codes are retrieved: KOEO, KOER and Continuous Memory codes. See theTESTS W/CODES - EEC-V (4.6L) article in the ENGINE PERFORMANCE section.
- If any cooling fan related codes are present, identify code and go to appropriate step. See appropriate table under TROUBLE CODE DIRECTORY . If no codes are present, connect NGS scan tester to Data Link Connector (DLC).
- Turn ignition on. Access Output Test Mode on NGS scan tester. Command cooling fan on and check fan operation. On models with 2 fan speeds, check both fan speeds. If fan does not operate properly, perform appropriate test. See TROUBLE SHOOTING DIRECTORY table.TROUBLE SHOOTING DIRECTORY
Application (1) Go To Step Fan Inoperative 10 Fan Always Runs 20 (1) Perform appropriate step under COOLING FAN RELAY .