LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lincoln >> 2000 >> LS 3.0 S, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Module Communications Network >> System Tests >> Test F: Dual Automatic Temperature Control (DATC) Module Does Not Respond To NGS Tester
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Test F: Dual Automatic Temperature Control (DATC) Module Does Not Respond To NGS Tester

  1. Turn ignition switch to LOCK position. Disconnect DATC module harness connector C228a. Inspect harness connector for loose, damaged or corroded terminals. If problem exists, repair harness connector as necessary and retest system for normal operation. If problem does not exist, go to next step.
  2. Connect DATC module harness connector C228a and connect NGS tester. Turn ignition switch to RUN position. Perform data link diagnostic test. See DATA LINK DIAGNOSTIC TEST  under SELF-DIAGNOSTIC SYSTEM. If NGS tester indicates DATC: NO RESPONSE ON CKT 914 (BUS +), go to next step. If NGS tester indicates DATC: NO RESPONSE ON CKT 915 (BUS -), go to step  6 .
  3. Turn ignition switch to LOCK position. Disconnect NGS tester. Disconnect DATC module harness connector C228a. Measure resistance between terminal No. 12 (Gray/Black wire) at DATC module harness connector C228a and terminal No. 2 (Gray/Red wire) at Data Link Connector (DLC). See Figure and Fig 1 . If resistance is greater than 5 ohms, go to next step. If resistance is 5 ohms or less, replace DATC module and retest system for normal operation.
  4. Disconnect joint connector No. 4 harness connector C223, located behind left side of instrument panel. Measure resistance in Gray/Black wire between terminal No. 15 at joint connector No. 4 harness connector C223 and terminal No. 12 at DATC module harness connector C228a. See Figure and Fig 1 . If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Gray/Black wire between joint connector No. 4 and DATC module. Retest system for normal operation.
  5. Measure resistance between terminals No. 14 and 15 at joint connector No. 4 (component side). See Figure . If resistance is 5 ohms or less, repair open in Gray/Red wire between joint connector No. 4 and DLC. Retest system for normal operation. If resistance is greater than 5 ohms, replace joint connector No. 4 and retest system for normal operation.
  6. Turn ignition switch to LOCK position. Disconnect NGS tester. Disconnect DATC module harness connector C228a. Measure resistance between terminal No. 1 (Blue/Yellow wire) at DATC module harness connector C228a and terminal No. 10 (Blue/Red wire) at Data Link Connector (DLC). See Figure and Fig 1 . If resistance is 5 ohms or less, replace DATC module and retest system for normal operation. If resistance is greater than 5 ohms, go to next step.
  7. Disconnect joint connector No. 4 harness connector C223, located behind left side of instrument panel. Measure resistance in Blue/Yellow wire between terminal No. 8 at joint connector No. 4 harness connector C223 and terminal No. 1 at DATC module harness connector C228a. See Figure and Fig 1 . If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Blue/Yellow wire between joint connector No. 4 and DATC module. Retest system for normal operation.
  8. Measure resistance between terminals No. 8 and 9 at joint connector No. 4 (component side). See Figure . If resistance is 5 ohms or less, repair open in Blue/Red wire between joint connector No. 4 and DLC. Retest system for normal operation. If resistance is greater than 5 ohms, replace joint connector No. 4 and retest system for normal operation.
Fig 1: Identifying Dual Automatic Temperature Control Module Harness Connector Terminals
G00011082Courtesy of FORD MOTOR CO.
scientia non olet · About LEMON Manuals