Accumulating PCM Data
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PCM data can be accumulated in a number of ways. Gather as much data as possible when the malfunction is occurring to prevent misdiagnosis. Data should be accumulated during different operating conditions and based on the customer description of the intermittent fault. Reference the known good data values located in REFERENCE VALUES - 6.0L DIESEL . This will require recording data in four conditions for comparison: 1) KOEO, 2) HOT IDLE, 3) 30 mph and 4) 55 mph. Acquisition of PCM PID data using a scan tool is one of the easiest ways to gather information.
For information on the functions of your scan tool, Refer to the manufacturer manual for scan tool instructions.
Below is a list of the functions available:
- Selecting and viewing PIDs
- Storing PIDs
- Recording measurements along with PIDs
- Playback of stored PIDs
- Peripheral inputs