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Data Link Diagnostic Test

  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 ON position. Rotate dial on NGS tester to menu item DIAGNOSTIC DATA LINK and press trigger. A test will be performed on the bus (circuits No. 914 and 915) for module communications network and ISO 9141 communication link (circuit No. 70). If NGS tester displays, SYSTEM PASSED, module communications network is operating properly. Return to article that directed you here and continue diagnosis. If NGS tester does not display SYSTEM PASSED, perform appropriate test. See DATA LINK DIAGNOSTICS NETWORK TEST  table.
DATA LINK DIAGNOSTICS NETWORK TEST

Scan Tool Readout Perform Test
CKT70 = ALL ECUS NO RESP / NOT EQUIP L 
CKT914 = ALL ECUS NO RESP / NOT EQUIP M 
CKT915 = ALL ECUS NO RESP / NOT EQUIP M 
CKT70, CKT914, CKT915 = SOME ECUS NO RESP / NOT EQUIP (1)
NO RESPONSE ON CKT914 (BUS +) (1)
NO RESPONSE ON CKT915 (BUS -) (1)
NO RESPONSE / NOT EQUIPPED (1)
(1) Repair communication concern for appropriate module(s). See SYMPTOM INDEX  table under SYSTEM TESTS.
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