Accumulating PCM Data

PCM data can be accumulated in a number of ways. This includes circuit measurements with a multimeter or NGS PID data. Acquisition of PCM PID data using the NGS Tester is one of the easiest ways to gather information. Gather as much data as possible when the fault is occurring to prevent improper diagnosis. Data should be accumulated during different operating conditions and based on the customer description of the intermittent fault. Compare this data with the known good data values. Refer to PIN VOLTAGE/PID VALUE CHARTS . This will require recording data in four conditions for comparison: 1) KOEO, 2) HOT IDLE, 3) 48 km/h (30 mph) and 4) 89 km/ h (55 mph).