Symptom Chart: Communication Network
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .
| Condition | Possible Sources | Actions |
|---|---|---|
| The vehicle does not start with the diagnostic scan tool connected to the DLC and/or multiple malfunction indicators are only on when the diagnostic scan tool is connected to the DLC | Refer to the Pinpoint Test | GO to Pinpoint Test AZ |
| No HS-CAN1 communication, all modules are not responding | Refer to the Pinpoint Test | GO to Pinpoint Test AV |
| No HS-CAN2 communication, all modules are not responding | Refer to the Pinpoint Test | GO to Pinpoint Test AW |
| No HS-CAN3 communication, all modules are not responding | Refer to the Pinpoint Test | GO to Pinpoint Test AX |
| No MS-CAN communication, all modules are not responding | Refer to the Pinpoint Test | GO to Pinpoint Test AY |
| The PCM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test A |
| The TCM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test B |
| The GSM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test C |
| The ABS module does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test D |
| The VDM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test E |
| The PSCM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test F |
| The TCCM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test G |
| The ATCM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test H |
| The DCMR (electronic limited slip differential) | Refer to the Pinpoint Test | GO to Pinpoint Test I |
| The RCM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test J |
| The BECMB does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test K |
| The OCSM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test L |
| The SCCM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test M |
| The IPC does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test N |
| The BCM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test O |
| The BCMB (memory column and pedals) does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test P |
| The FCIM module does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test Q |
| The RHVAC module does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test R |
| The ACM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test S |
| The DACMC does not respond to the diagnostic scan tool (integrated with the ACM) | Refer to the Pinpoint Test | GO to Pinpoint Test S |
| The IPMA does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test T |
| The IPMB does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test U |
| The APIM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test V |
| The audio DSP does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test W |
| The TCU does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test X |
| The GFM (CD changer) does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test Y |
| The RACM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test Z |
| The WACM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AA |
| The RTM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AB |
| The DSM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AC |
| The DDM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AD |
| The PDM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AE |
| The SODL does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AF |
| The SODR does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AG |
| The HUD module does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AH |
| The PAM does not respond to the diagnostic scan tool (integrated with the BCM) | Refer to the Pinpoint Test | GO to Pinpoint Test O |
| The PAM does not respond to the diagnostic scan tool (active park assist only) | Refer to the Pinpoint Test | GO to Pinpoint Test AI |
| The DC/DC (Voltage Quality Module) does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AJ |
| The HSWM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AK |
| The RGTM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AL |
| The SCME does not respond to the diagnostic scan tool (integrated with the DSM) | Refer to the Pinpoint Test | GO to Pinpoint Test AC |
| The SCMB does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AM |
| The SCMG does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AN |
| The SCMH does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AO |
| The SCMJ does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AP |
| The HCM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AQ |
| The TRM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AR |
| The TBM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AS |
| The RBM module does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AT |
| The GWM does not respond to the diagnostic scan tool | Refer to the Pinpoint Test | GO to Pinpoint Test AU |
| No power to the DLC | Refer to the Pinpoint Test | GO to Pinpoint Test AZ |