Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Communication System Diagnosis
Before preceding to the Multiplex Communication Network (MCN) or Diagnostic Communication Network (DCN) index tables to diagnose a network DTC, review equipment level of vehicle. Make note of module and systems vehicle is not equipped with. Before proceeding to a pinpoint test, make sure DTC being diagnosed is referencing a module or system which the vehicle is equipped with. The New Generation Star (NGS) tester may produce a network DTC for no communication if the vehicle is not equipped with the suspect module or system. The New Generation Star (NGS) tester will interpret a not equipped module as a communication failure. If a DTC is retrieved for a not equipped module or system disregard this DTC. If a not equipped DTC is the only DTC retrieved the communication system self test should be considered passed.
| DTC | Module Involved | Action |
|---|---|---|
| 0000 | ... | Link Passed |
| 0001 | Powertrain Control Module (PCM) | Test A |
| 0002 | Electronic Automatic Temperature Control (EATC) | Test B |
| 0003 | PCM, EATC | Test C |
| DTC | Module Involved | Action |
|---|---|---|
| 0000 | ... | Link Passed |
| 0001 | Powertrain Control Module (PCM) | Test A |
| 0002 | Electronic Automatic Temperature Control (EATC) | Test B |
| 0003 | PCM, EATC | Test C |
| 0004 | Fuel Indication Module (FIM) | Test D |
| 0005 | FIM, PCM | Test E . If Not Equipped With FIM, Test A |
| 0006 | EATC, FIM | If Equipped With EATC, Test B . If Equipped With FIM, Test D . |
| 0007 | EATC, FIM, PCM | If Equipped With PCM Only, Test A . If Not Equipped With FIM, Test C . If Not Equipped With EATC, Test E . |
| DTC | Module Involved | Action |
|---|---|---|
| 0000 | ... | System Passed |
| 0001 | Lighting Control Module (LCM) | Test F |
| 0002 | Anti-Lock Brake System (ABS) | Test G |
| 0003 | ABS, LCM | Test F |
| 0004 | Driver Seat Module (DSM) | Test H . If Not Equipped With DSM, System Passed |
| 0005 | DSM, LCM | Test F |
| 0006 | ABS, DSM | Test G |
| 0007 | ABS, DSM, LSM | Test F |
| 0008 | Driver Door Module (DDM) | Test J |
| 0009 | DDM, LCM | Test F |
| 000A | ABS, DDM | Test G |
| 000B | ABS, DDM, LCM | Test F |
| 000C | DDM, Driver Seat Module (DSM) | Test J |
| 000D | DDM, DSM, LCM | Test F |
| 000E | ABS, DDM | Test G |
| 000F | ABS, DDM, DSM, LCM | Test F |
| 0010 | Integrated Air Bag Monitor (IABM) | Test K |
| 0011 | IABM, LCM | Test F |
| 0012 | ABS, IABM | Test G |
| 0013 | ABS, IABM, LCM | Test F |
| 0014 | DSM, IABM | Test H . If Not Equipped With DSM, Test K . |
| 0015 | DSM, IABM, LCM | Test H . If Not Equipped With DSM, Test F . |
| 0016 | ABS, DSM, IABM | Test G |
| 0017 | ABS, DSM, IABM, LCM | Test F |
| 0018 | DDM, IABM | Test J |
| 0019 | DDM, IABM, LCM | Test F |
| 001A | DDM, IABM, LCM | Test G |
| 001B | ABS, DDM, IABM, LCM | Test F |
| 001C | DDM, DSM, IABM | Test J |
| 001D | DDM, DSM, IABM, LCM | Test F |
| 001E | ABS, DDM, DSM, IABM | Test F |
| 001F | ABS, DDM, DSM, IABM, LCM | Test L . If Not Equipped With DSM, Test F . |
| DCT | Module Involved | Action |
|---|---|---|
| 0000 | ... | System Passed |
| 0001 | Lighting Control Module (LCM) | Test F |
| 0002 | Anti-Lock Brake System (ABS) | Test G . If not Equipped With ABS, System Passed. |
| 0003 | ABS, LCM | Test G . If Not Equipped With ABS, System Passes. |
| 0004 | Driver Seat Module (DSM) | Test H . If Not Equipped With DSM, System Passes. |
| 0005 | DSM, LCM | Test H . If Not Equipped With DSM, Test F . |
| 0006 | ABS, DSM, LCM | Test G . If Not Equipped With ABS, Test H . If Not Equipped With ABS Or DSM, System Passed. |
| 0007 | ABS, DSM | Test G . If Not Equipped With ABS, Test H . If Not Equipped With ABS Or DSM, Test F . |
| 0008 | Driver Door Module (DDM) | Test J . If Not Equipped With DDM, System passed. |
| 0009 | DDM, LCM | Test J . If Not Equipped With DDM, Test F . |
| 000A | ABS, DDM | Test G . If Not Equipped With ABS, Test J . If Not Equipped With ABS Or DDM, System Passed. |
| 000B | ABS, DDM, LCM | Test G . If Not Equipped With ABS, Test J . If Not Equipped With ABS Or DDM, Test F . |
| 000C | DDM, DSM | Test J . If Not Equipped With DDM, System Passed. |
| 000D | DDM, DSM, LCM | Test J . If Not Equipped With DDM, Test F . |
| 000E | ABS, DDM DSM | Test G , If Not Equipped With ABS, Test J . If Not Equipped With DDM Or ABS, System Passed. |
| 000F | ABS, DDM, DSM, LCM | Test G . If Not Equipped With ABS, Test J , If Not Equipped With ABS Or DDM, Test F . |
| 0010 | Integrated Air Bag Module (IABM) | Test K |
| 0011 | IABM | Test F |
| 0012 | ABS, IABM | Test G . If Not Equipped With ABS, Test K . |
| 0013 | ABS, IABM, LCM | Test G . If Not Equipped With ABS, Test K . |
| 0014 | DSM, IABM | Test H . If Not Equipped With DSM, Test K . |
| 0015 | DSM, IABM, LCM | Test H . If Not Equipped With DSM, Test F . |
| 0016 | ABS, DSM, IABM | Test G . If Not Equipped With ABS, Test H . If Not Equipped With ABS Or DSM, Test K . |
| 0017 | ABS, DSM, IABM, LCM | Test G . If Not Equipped With ABS, Test H . If Not Equipped With ABS Or DSM, Test F . |
| 0018 | DDM, IABM | Test J . If Not Equipped With DDM, Test K . |
| 0019 | DDM, IABM, LCM | Test J . If Not Equipped With DDM, Test F . |
| 001A | ABS, DDM, IABM | Test G . If Not Equipped With ABS, Test J . If Not Equipped With ABS Or DDM, Test K . |
| 001B | ABS, DDM, IABM, LCM | Test G . If Not Equipped With ABS, Test J . If Not Equipped With ABS Or DDM, Test F . |
| 001C | DDM, DSM, IABM | Test J . If Not Equipped With DDM, Test F . |
| 001D | DDM, DSM, IABM, LCM | Test J . If Not Equipped With DDM, Test F . |
| 001E | ABS, DDM, DSM, IABM | Test G . If Not Equipped With ABS, Test J . If Not Equipped With ABS Or DDM, Test K . |
| 001F | ABS, DDM, DSM, IABM, LCM | Test L . If Not Equipped With ABS, Test M . If Not Equipped With DSM, Test N . If Not Equipped With ABS Or DSM, Test P . If Not Equipped With DDM, Test Q . If Equipped With IABM & LCM Only, Test R . |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.