On-Board Diagnostics with Scan Tool

NOTE: For detailed instruction and other diagnostic methods using the scan tool, refer to the scan tool tester and the Introduction - Gasoline Engines article.

These quick tests should be used to diagnose the PCM and should be carried out in order.

Quick Test 1.0 - Visual Inspection
Quick Test 2.0 - Set Up
Quick Test 3.0 - Key On, Engine Off (KOEO)
Quick Test 4.0 - Continuous Memory
Quick Test 5.0 - Key On, Engine Running (KOER)
Special Test Mode
- Wiggle Test Mode
- Output Test Mode
PCM Reset Mode
Clearing DTCs
OBD II Drive Cycle

For further information on other diagnostic testing features using the VCM or generic scan tool, refer to the Introduction - Gasoline Engines article.