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Data Link Diagnostic Test

NOTE: When performing data link diagnostic test, the NGS tester may display BUS circuits 4-PB9 (4-PC28 without ABS) and 5-PB9 (5-PC28 without ABS) as circuits No. 914 and 915. The NGS tester may also display ISO circuit 8-DA1 (8-JA7 without ABS) as circuit No. 70.
  1. Connect New Generation Star (NGS) tester to Data Link Connector (DLC), if not already connected. Select vehicle to be tested from NGS tester menu.
  2. Turn ignition switch to RUN position. Rotate dial on NGS tester to menu item DIAGNOSTIC DATA LINK and press trigger. A test will be performed on the BUS for the module communications network and the ISO 9141 communication link.
  3. If NGS tester displays CKT 914 = SYSTEM PASSED and CKT 915 = SYSTEM PASSED, module communications network is okay. If NGS tester displays CKT 70 = SYSTEM PASSED, ISO 9141 communication link is operating properly. Return to article that directed you here and continue diagnosis.
  4. If NGS tester displays CKT 914 = ALL MODULE NO RESPONSE/NOT EQUIPPED, CKT 915 = ALL MODULE NO RESPONSE/NOT EQUIPPED and CKT 70 = ALL MODULE NO RESPONSE/NOT EQUIPPED, perform TEST A: NO MODULE/NETWORK COMMUNICATION WITH NGS TESTER  .
  5. If module in question is NO RESPONSE/NOT EQUIPPED, perform appropriate tests. See SYMPTOM CHART  table under SYSTEM TESTS.
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