Code P047 & P107, IPC-To-Pcm Data Link Problem: Action

PCM turns on MIL. PCM sets all data to zero. PCM boosts idle to compensate for possible A/C clutch engagement. Cooling fan control will be based on engine coolant temperature only.

1. If one code is set without the other, PCM has an internal communication problem.
2. Checks if data link is not functioning at all.
3. Checks if PROM is seated correctly in socket.
4. Checks which components have data link problem to IPC.
5. Checks if IPC is having data link problem with PCM or if PCM is having a data link problem with IPC.
6. Checks if data link is open or if PCM is faulty.
7. Checks for wake-up sequence problem.

Fig 1: Code P047 & P107 Schematic, IPC-To-PCM Data Link Problem

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code P047 & P107 Diagnostic Flow Chart, IPC-To-PCM Data Link Problem

Courtesy of GENERAL MOTORS CORP.