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Home >> Cadillac >> 1996 >> DeVille Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> IPC DIAGNOSTIC TROUBLE CODES (DTCs) >> DTC IP 2750 >> PASS-KEY II Data Communication Failure

PASS-KEY II Data Communication Failure

  1. Turn ignition on. Wait one minute. If DTC 2750 is current, go to next step. If DTC 2750 is not current (history), it is possible an intermittent condition is present. Check for DTC 2016 or 2255. If other DTCs are present, verify PCM power, ground, and serial data connections.
  2. If PRNDL is boxed and flashing, go to next step. If PRNDL is not boxed and flashing, determine whether IPC or PCM have been swapped in this vehicle. If IPC or PCM have been swapped, perform PASS-KEY II relearn. See appropriate ANTI-THEFT SYSTEM article. If IPC or PCM have not been swapped, replace PCM.
  3. Attempt to establish communications with PCM using on-board diagnostics. If NO DATA is not displayed, go to next step. If NO DATA is displayed, verify PCM operation, power, ground and serial data connections.
  4. If a PCM 1520 current DTC is set, go to next step. If a PCM 1520 current DTC is not set, an intermittent condition exists on class 2 serial data line. Perform diagnosis/repair as a DTC IP 2016.
  5. If IPC or PCM have been replaced, perform a PASS-KEY II relearn using scan tool. See appropriate ANTI-THEFT SYSTEM article. If IPC or PCM have not been replaced, replace PCM.
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