Test E: Electronic Automatic Temperature Control (EATC) Module Does Not Respond To NGS Tester
- Turn ignition switch to LOCK position. Disconnect EATC module harness connector C227. See Figure
. Inspect harness connector for loose, damaged or corroded terminals. If problem does not exist, go to next step. If problem exists, repair as necessary and retest system.
- Connect EATC module harness connector C227. Connect NGS tester to Data Link Connector (DLC). Turn ignition switch to RUN position. Perform data link diagnostic procedure. See DATA LINK DIAGNOSTIC TEST
under SELF-DIAGNOSTIC SYSTEM. If NGS tester responds with EATC: NO RESPONSE ON CKT914 (BUS +), go to next step. If NGS tester does not respond with EATC: NO RESPONSE ON CKT915 (BUS -), go to step 4
.
- Disconnect NGS tester. Disconnect EATC module harness connector C227. Measure resistance in Tan/Orange wire between terminal No. 15 at EATC module harness connector C227 and terminal No. 2 at DLC. See Figure
and Fig 1
. If resistance is 5 ohms or less, replace EATC module. If resistance is greater than 5 ohms, repair open in Tan/Orange wire between EATC module and DLC.
- Disconnect NGS tester. Disconnect EATC module harness connector C227. Measure resistance in Pink/Light Blue wire between terminal No. 1 at EATC module harness connector C227 and terminal No. 10 at DLC. See Figure
and Fig 1
. If resistance is 5 ohms or less, replace EATC module. If resistance is greater than 5 ohms, repair open in Pink/Light Blue wire between EATC module harness connector and DLC.
Courtesy of FORD MOTOR CO.