DCS Troubleshooting: OBDII Inoperable

Ford ® OBDII

  • Plug in the scan tool to OBDII port. If the scan tool lights up, you have B+ power and ground to the OBDII port.
  • Inspect OBDII pins for wear. It is not uncommon for pins to be worn out at the OBDII port, which could be the cause of no communication.
  • Verify that the PCM connector is properly connected. Inspect for faults in the harness.
  • Verify B+ power, key on power, and ground at the PCM.

Cummins® OBDII

  • Plug in the scan tool to OBDII port. If the scan tool lights up, you have B+ power and ground to the OBDII port.
  • Perform a visual inspection of the OBDII port pin and wiring harness.
  • Verify that the ECM connector is properly connected, inspect for faults in the harness.
  • Verify B+ power, key on power, and ground at the PCM.

If issues continue to persist, you may contact us for more troubleshooting tips: 320-440-2900.

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