Data Link Diagnostic Test

WARNING: This page is about a different car, the 2001 Lincoln Continental. However, it is still accessible from the selected car via links, so may be relevant.

Connect New Generation Star (NGS) tester to Data Link Connector (DLC), if not already connected. Select vehicle to be tested from NGS tester menu.
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 bus (circuits No. 914 and 915) for the module communications network and International Standards Organization (ISO) 9141 communication link (circuit No. 70). Circuit No. 70 is a Light Blue/White wire that is between terminal No. 7 on DLC and terminal No. 5 at Restraints Control Module (RCM).
If NGS tester displays CKT 914 (+) = SYSTEM PASSED and CKT 915 (-) = SYSTEM PASSED, module communications network is okay at this time. If NGS tester displays CKT 70 = SYSTEM PASSED, ISO 9141 communication link is okay at this time. Return to article that directed you here and continue diagnosis.
If NGS tester does not display CKT 914 (+) = SYSTEM PASSED, CKT 915 (-) = SYSTEM PASSED and CKT 70 = SYSTEM PASSED, perform the following as applicable:
- If no response from NGS tester, perform TEST P: NO MODULE/NETWORK COMMUNICATION under SYSTEM TESTS.
- If NGS tester displays CKT 70, CKT 914 and/or CKT 915 = SOME ECUS NO RESP/NOT EQUIP, go to SYMPTOM INDEX table and perform appropriate test.
- If NGS tester displays CKT 70 = ALL ECUS NO RESP/NOT EQUIP, perform TEST F: RESTRAINTS CONTROL MODULE DOES NOT RESPOND TO NGS TESTER under SYSTEM TESTS.
- If NGS tester displays CKT 914 = ALL ECUS NO RESP/NOT EQUIP, perform TEST N: NO MODULE/NETWORK COMMUNICATION (BUS LINK) under SYSTEM TESTS.
- If NGS tester displays CKT 915 = ALL ECUS NO RESP/NOT EQUIP, perform TEST N: NO MODULE/NETWORK COMMUNICATION (BUS LINK) under SYSTEM TESTS.
- If module in question is NO RESPONSE/NOT EQUIPPED, go to SYMPTOM INDEX table and perform appropriate test.
- If module in question is NO RESPONSE ON CKT 914 (BUS +), go to SYMPTOM INDEX table and perform appropriate test.
- If module in question is NO RESPONSE ON CKT 915 (BUS -), go to SYMPTOM INDEX table and perform appropriate test.

SYMPTOM INDEX

Symptom

Perform Test

Anti-Lock Brake System (ABS) Module Does Not Respond To NGS Tester

Audio Control Module (ACM) Does Not Respond To NGS Tester

Driver's Door Module (DDM) Does Not Respond To NGS Tester

Driver's Seat Module (DSM) Does Not Respond To NGS Tester

Electronic Automatic Temperature Control (EATC) Module Does Not Respond To NGS Tester

Restraint Control Module (RCM) Does Not Respond To NGS Tester ⁽¹⁾

Lighting Control Module (LCM) Does Not Respond To NGS Tester

Speed Control Servo/Amplifier Assembly Does Not Respond To NGS Tester ⁽²⁾

Powertrain Control Module (PCM) Does Not Respond To NGS Tester

Remote Emergency Satellite Cellular Unit (RESCU) Module Does Not Respond To NGS Tester

Vehicle Dynamics Module (VDM) Does Not Respond To NGS Tester

Virtual Image Cluster (VIC) Does Not Respond To NGS Tester

No Module/Network Communication (BUS Link)

No Module/Network Communication (ISO 9141 Link)

No Module/Network Communication

⁽¹⁾	Restraint control module may as be referred to as Electronic Crash Sensor (ECS) module.

⁽²⁾	Speed control servo/amplifier assembly may also be referred to as Next Generation Speed Control (NGSC) servo.