LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 1997 >> Mustang Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Module Communications Network System >> Communication Network Diagnostics >> Data Link Diagnostics
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Data Link Diagnostics

  1. Connect New Generation Star (NGS) scan tester on Data Link Connector (DLC) and perform proper hook-up procedure. See EQUIPMENT HOOK-UP .
  2. Turn ignition switch to ON position. Rotate dial on scan tester to menu item DIAGNOSTIC DATA LINK and press trigger. A test will be performed on the BUS (circuits No. 914 and 915) for the module communications network and the ISO 9141 communication link circuit No. 70. This is the Light Blue/White wire that goes between terminal No. 7 on DLC and the air bag diagnostic monitor.
  3. If scan tester displays CKT 914 (+) = SYSTEM PASSED and CKT 915 (-) = 0000, module communications network is okay. If scan tester displays CKT 70 = SYSTEM PASSED, ISO 9141 communication link is operating properly.
  4. If scan tester displays CKT 914 (+) = 0001 and CKT 915(-) = 0001, go to TEST A: POWERTRAIN CONTROL MODULE (PCM) FAULT ON CIRCUIT NO. 914/915 under TESTING .
  5. If scan tester displays CKT 914 (+) = 0002 and CKT 915(-) = 0002, go to TEST B: PASSIVE ANTI-THEFT SYSTEM (PATS) FAULT ON CIRCUIT NO. 914/915 under TESTING .
  6. If scan tester displays CKT 914 (+) = 0003 and CKT 915(-) = 0003, and vehicle is equipped with passive anti-theft system, go to TEST C: FAULT ON CIRCUIT NO. 914/915 under TESTING . If scan tester displays CKT 914 (+) = 0003 and CKT 915 (-) = 0003, and vehicle is not equipped with passive anti-theft system, go to TEST A: POWERTRAIN CONTROL MODULE (PCM) FAULT ON CIRCUIT NO. 914/915 under TESTING .
  7. If scan tester displays CKT 70 = 0001, go to TEST D: AIR BAG DIAGNOSTIC MONITOR COMMUNICATION FAULT under TESTING .
scientia non olet · About LEMON Manuals