Data Link Diagnostic 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) for the module communications network and the ISO 9141 communication link (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 M: 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, go to SYMPTOM INDEX table to continue diagnosis.
- If NGS tester displays CKT70 = ALL ECUS NO RESP/NOT EQUIP, go to TEST L: NO MODULE/NETWORK COMMUNICATIONS - ISO 9141 NETWORK under SYSTEM TESTS.
- If NGS tester displays CKT914 = ALL ECUS NO RESP/NOT EQUIP, go to TEST K: NO MODULE/NETWORK COMMUNICATIONS - SCP NETWORK under SYSTEM TESTS.
- If NGS tester displays CKT915 = ALL ECUS NO RESP/NOT EQUIP, go to TEST K: NO MODULE/NETWORK COMMUNICATIONS - SCP NETWORK under SYSTEM TESTS.
- If module in question is NO RESPONSE/NOT EQUIPPED, go to SYMPTOM INDEX table to continue diagnosis.
- If module in question is NO RESPONSE ON CKT914 (BUS+), go to SYMPTOM INDEX table to continue diagnosis.
- If module in question is NO RESPONSE ON CKT915 (BUS-), go to SYMPTOM INDEX table to continue diagnosis.
SYMPTOM INDEX
| Symptom | Perform Test | ||||
|---|---|---|---|---|---|
| 4-Wheel Anti-Lock Brake System (4WABS) Module Does Not Respond To NGS Tester | A | ||||
| Remote Anti-Theft Personality (RAP) Module Does Not Respond To NGS Tester | B | ||||
| Generic Electronic Module (GEM) Does Not Respond To NGS Tester | C | ||||
| Restraint Control Module (RCM) Does Not Respond To NGS Tester | D | ||||
| Air Suspension Control Module Does Not Respond To NGS Tester | E | ||||
| Driver's Seat Module (DSM) Does Not Respond To NGS Tester (1) | F | ||||
| Parking Aid Module (PAM) Does Not Respond To NGS Tester | G | ||||
| Powertrain Control Module (PCM) Does Not Respond To NGS Tester | H | ||||
| Instrument Cluster Does Not Respond To NGS Tester | I | ||||
| Electronic Automatic Temperature Control (EATC) Module Does Not Respond To NGS Tester (2) | J | ||||
| No Module/Network Communications - SCP Network | K | ||||
| No Module/Network Communications - ISO 9141 Network | L | ||||
| No Module/Network Communication - No Power To NGS Tester | M | ||||
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