Test E: Electronic Automatic Temperature Control Module Does Not Respond To NGS Tester
WARNING: This page is about a different car, the 2001 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition switch to LOCK position. Disconnect Electronic Automatic Temperature Control (EATC) module White harness connector C281. EATC module is located in center of instrument panel. See Figure. Inspect EATC harness connector C281 for loose, damaged or corroded terminals. Repair as necessary and retest system for normal operation. If harness connector is okay, reconnect harness connector. Connect New Generation Star (NGS) tester to Data Link Connector (DLC). DLC is located below left side of instrument panel, to right of steering column. Turn ignition switch to RUN position and perform data link diagnostic test. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM. If NGS tester indicates EATC: NO RESPONSE ON CKT 914 (BUS +), go to next step. If NGS tester indicates EATC: NO RESPONSE ON CKT 915 (BUS -), go to step 3.
- Turn ignition switch to LOCK position. Disconnect NGS tester. Disconnect EATC module White harness connector C281. Measure resistance in Tan/Orange wire between EATC module harness connector C281 terminal No. 15 and DLC terminal No. 2. See Figure and Fig 1 . If resistance is 5 ohms or more, repair open in Tan/Orange wire between EATC and DLC. If resistance is 5 ohms or less, replace EATC module. Retest system for normal operation.
- Turn ignition switch to LOCK position. Disconnect NGS tester. Disconnect EATC module White harness connector C281. Measure resistance in Pink/Light Blue wire between EATC module harness connector C281 terminal No. 1 and DLC terminal No. 10. See Figure and Fig 1 . If resistance is 5 ohms or more, repair open in Pink/Light Blue wire between EATC and DLC. If resistance is 5 ohms or less, replace EATC module. Retest system for normal operation.