Data Link Diagnostics Network Test
- Connect New Generation Star (NGS) tester to Data Link Connector (DLC). Select vehicle to be tested from NGS tester menu. 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 (circuits No. 914 and 915) network and the ISO 9141 network (circuit No. 70).
- If NGS tester displays SYSTEM PASSED, module communications networks are okay. Return to article of system in question to continue diagnosis.
- If NGS tester does not display SYSTEM PASSED, perform the following as applicable:
- If no response from NGS tester, go to TEST K: NO MODULE/NETWORK COMMUNICATION - NO POWER TO NGS TESTER under SYSTEM TESTS.
- If NGS tester displays CKT70, CKT914 and/or CKT915 = SOME ECUS NO RESP/NOT EQUIP, see SYMPTOM INDEX table to continue diagnosis.
- If NGS tester displays CKT70 = ALL ECUS NO RESP/NOT EQUIP, go to TEST I: NO MODULE/NETWORK COMMUNICATIONS - ISO 9141 NETWORK under SYSTEM TESTS.
- If NGS tester displays CKT914 = ALL ECUS NO RESP/NOT EQUIP, go to TEST J: NO MODULE/NETWORK COMMUNICATIONS - SCP NETWORK under SYSTEM TESTS.
- If NGS tester displays CKT915 = ALL ECUS NO RESP/NOT EQUIP, go to TEST J: NO MODULE/NETWORK COMMUNICATIONS - SCP NETWORK under SYSTEM TESTS.
- If module in question is NO RESPONSE/NOT EQUIPPED, see SYMPTOM INDEX table to continue diagnosis.
- If module in question is NO RESPONSE ON CKT914 (BUS+) or NO RESPONSE ON CKT915 (BUS-), see SYMPTOM INDEX table to continue diagnosis.
SYMPTOM INDEX
| Condition | Perform Test |
|---|---|
| Anti-Lock Brake System Module Does Not Respond To NGS Tester | A |
| Electronic Crash Sensor Module Does Not Respond To NGS Tester | B |
| Overhead Trip Computer Module Does Not Respond To NGS Tester | C |
| Generic Electronic Module Does Not Respond To NGS Tester | D |
| Parking Aid Module Does Not Respond To NGS Tester | E |
| Powertrain Control Module Does Not Respond To NGS Tester | F |
| Auxiliary Powertrain Control Module Does Not Respond To NGS Tester | G |
| Passive Anti-Theft Systems Module Does Not Respond To NGS Tester | H |
| No Module/Network Communications - ISO 9141 Network | I |
| No Module/Network Communications - SCP Network | J |
| No Module/Network Communication - No Power To NGS Tester | K |