Accumulating Alternative Fuel Data

Alternative fuel data can be accumulated in a number of ways. Gather as much data as possible when the fault is occurring to prevent misdiagnosis. Data should be accumulated during different operating conditions and based on the customer description of the intermittent fault. Refer to the known good data values located in TYPICAL DIAGNOSTIC REFERENCE VALUES . This will require recording data in two conditions for comparison: 1) KOEO, 2) HOT IDLE. Acquisition of AFCM PID data using a scan tool is one of the easiest ways to gather information. Refer to the following for instructions on gathering PID data using a scan tool.