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Home >> Mazda >> 2001 >> Tribute ES, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Module Communications Network >> Self-Diagnostic System >> Data Link Diagnostic Test

Data Link Diagnostic Test

  1. Connect New Generation Star (NGS) tester to Data Link Connector (DLC), if not already connected. Turn ignition switch to RUN position. Select DATA LINK DIAGNOSTIC TEST. A test will be performed on SCP BUS (circuits No. 914 and 915) and ISO 9141 (circuit No. 70) network.
  2. If NGS tester displays SYSTEM PASSED, system is okay.
  3. If NGS tester does not display SYSTEM PASSED, perform the following as applicable:
    • If no response from NGS tester, repair DLC power distribution. See appropriate wiring diagram in DATA LINK CONNECTORS, GROUND DISTRIBUTION and/or POWER DISTRIBUTION article in WIRING DIAGRAMS.
    • If NGS tester displays CKT 70, CKT 914 and/or CKT 915 = ECUS NO RESP/NOT EQUIP, repair affected circuit. See appropriate wiring diagram in DATA LINK CONNECTORS, GROUND DISTRIBUTION and/or POWER DISTRIBUTION article in WIRING DIAGRAMS.
    • If NGS tester displays CKT 70 = ALL ECUS NO RESP/NOT EQUIP, ISO 9141 network is at fault. Isolate and repair damaged circuit. See appropriate wiring diagram in DATA LINK CONNECTORS, GROUND DISTRIBUTION and/or POWER DISTRIBUTION article in WIRING DIAGRAMS.
    • If NGS tester displays CKT 914 or CKT 915 = ALL ECUS NO RESP/NOT EQUIP, SCP bus is at fault. Isolate and repair affected circuit. See appropriate wiring diagram in DATA LINK CONNECTORS, GROUND DISTRIBUTION and/or POWER DISTRIBUTION article in WIRING DIAGRAMS.
    • If module in question is NO RESPONSE ON CKT 914 (BUS +) or NO RESPONSE ON CKT 915 (BUS -), repair appropriate module communication circuit. See appropriate wiring diagram in DATA LINK CONNECTORS, GROUND DISTRIBUTION and/or POWER DISTRIBUTION article in WIRING DIAGRAMS.
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