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Test A: Anti-Lock Brake System (Abs) Module Does Not Respond To NGS Tester

NOTE: Anti-Lock Brake System (ABS) control module may be referred to as a Stability Assist Module (SAM) if vehicle is equipped with traction control and stability assist.
  1. Turn ignition switch to LOCK position. Disconnect ABS module harness connector, located in right front of engine compartment. Disconnect NGS tester (if connected). Inspect ABS module 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 ABS module harness connector 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 ABS: NO RESPONSE ON CKT 914 (BUS +), go to next step. If NGS tester indicates ABS: NO RESPONSE ON CKT 915 (BUS -), go to step  9 .
  3. Turn ignition switch to LOCK position. Disconnect ABS module harness connector. Disconnect NGS tester. On vehicle without stability assist, measure resistance between terminal No. 11 (Gray wire) at ABS module harness connector and terminal No. 2 (Gray/Red wire) at Data Link Connector (DLC). See Figure and Fig 1 . On vehicles with stability assist, measure resistance between terminal No. 17 (Gray wire) at ABS module harness connector and terminal No. 2 (Gray/Red wire) at DLC. On all vehicles, resistance should be 5 ohms or less. If resistance is not as specified, go to next step. If resistance is as specified, replace ABS module and retest system for normal operation.
  4. Disconnect Auxiliary Junction Box (AJB) harness connector C283c, located behind left side of instrument panel. See Figure . Inspect harness connector for loose, damaged or corroded terminals. If problem does not exist, go to next step. If problem exists, repair harness connector as necessary and retest system for normal operation.
  5. On vehicle without stability assist, measure resistance in Gray wire between terminal No. 5 at AJB harness connector C283c and terminal No. 11 at ABS module harness connector. See Fig 1 and Fig 2 . On vehicle with stability assist, measure resistance in Gray wire between terminal No. 5 at AJB harness connector C283c and terminal No. 17 at ABS module harness connector. On all vehicles, resistance should be 5 ohms or less. If resistance is as specified, go to next step. If resistance is not as specified, repair open in Gray wire between AJB and ABS module. Retest system for normal operation.
  6. Disconnect AJB harness connector C283d, located behind left side of instrument panel. See Figure . Measure resistance between terminal No. 5 at AJB connector C283c and terminal No. 16 at AJB connector C283d (component side). See Fig 3 . If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, replace AJB and retest system for normal operation.
  7. Disconnect joint connector No. 4 harness connector C223, located behind left side of instrument panel. Measure resistance in Gray wire between terminal No. 12 at joint connector No. 4 harness connector C223 and terminal No. 16 at AJB harness connector C283d. See Fig 2 and Fig 4 . If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Gray wire between AJB and joint connector No. 4. Retest system for normal operation.
  8. Measure resistance between terminals No. 12 and 14 at joint connector No. 4 (component side). See Fig 5 . 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.
  9. Turn ignition switch to LOCK position. Disconnect ABS module harness connector. Disconnect NGS tester. On vehicle without stability assist, measure resistance between terminal No. 10 (Blue wire) at ABS module harness connector and terminal No. 10 (Blue/Red wire) at Data Link Connector (DLC). See Figure and Fig 1 . On vehicle with stability assist, measure resistance between terminal No. 19 (Blue wire) at ABS module harness connector and terminal No. 10 (Blue/Red wire) at DLC. On all vehicles, resistance should be 5 ohms or less. If resistance is not as specified, go to next step. If resistance is as specified, replace ABS module and retest system for normal operation.
  10. Disconnect Auxiliary Junction Box (AJB) harness connector C283c, located behind left side of instrument panel. See Figure . Inspect harness connector for loose, damaged or corroded terminals. If problem does not exist, go to next step. If problem exists, repair harness connector as necessary and retest system for normal operation.
  11. On vehicle without stability assist, measure resistance in Blue wire between terminal No. 6 at AJB harness connector C283c and terminal No. 10 at ABS module harness connector. See Fig 1 and Fig 2 . On vehicle with stability assist, measure resistance in Blue wire between terminal No. 6 at AJB harness connector C283c and terminal No. 19 at ABS module harness connector. On all vehicles, resistance should be 5 ohms or less. If resistance is as specified, go to next step. If resistance is not as specified, repair open in Blue wire between AJB and ABS module. Retest system for normal operation.
  12. Disconnect AJB harness connector C283d, located behind left side of instrument panel. See Figure . Measure resistance between terminal No. 6 at AJB connector C283c and terminal No. 12 at AJB connector C283d (component side). See Fig 3 . If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, replace AJB and retest system for normal operation.
  13. Disconnect joint connector No. 4 harness connector C223, located behind left side of instrument panel. Measure resistance in Blue wire between terminal No. 11 at joint connector No. 4 harness connector C223 and terminal No. 12 at AJB harness connector C283d. See Fig 2 and Fig 4 . If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Blue wire between AJB and joint connector No. 4. Retest system for normal operation.
  14. Measure resistance between terminals No. 9 and 11 at joint connector No. 4 (component side). See Fig 5 . 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 ABS Module Harness Connector Terminals
G00011074Courtesy of FORD MOTOR CO.
Fig 2: Identifying Auxiliary Junction Box Harness Connector Terminals
G00011075Courtesy of FORD MOTOR CO.
Fig 3: Identifying Auxiliary Junction Box Connector Terminals (Component Side)
G00011076Courtesy of FORD MOTOR CO.
Fig 4: Identifying Joint Connector No. 4 Harness Connector C223 Terminals
G00011077Courtesy of FORD MOTOR CO.
Fig 5: Identifying Joint Connector No. 4 Terminals (Component Side)
G00011078Courtesy of FORD MOTOR CO.
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