DSR20 - Check/Compare Parameter Identification (PID) Values

- Scan Tool connected.

- Accessories Off (A/C, heater, etc.).

- Start engine and warm to normal operating temperature.

Diagnostic Subroutines 20.0:

- Access each PID listed in chart. Check to see if all PID values are in the range given.

- Are PID values within range given?

YES -- RETURN to Symptom Flow Chart. Testing and Inspection

NO -- FOLLOW direction given in chart.