Reading and Clearing Diagnostic Trouble Codes

Diagnostics

Special Tool(s):

On-Board Diagnostic (OBD) With Diagnostic Tool

NOTE: For detailed instruction and other diagnostic methods using the diagnostic tool or equivalent, refer to the diagnostic tool tester manual and Computers and Control Systems.

These Quick Tests should be used to diagnose the powertrain control module (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 Codes
^ Quick Test 5.0 - Key On, Engine Running (KOER)
^ Special Test Modes
- Wiggle Test Mode
- Output Test Mode
^ PCM Reset Mode
^ Clearing DTCs P1000
^ On-Board Diagnostic (OBD) II Drive Cycle
^ Other Diagnostic Tool Features

For other diagnostic testing features using the diagnostic tool, refer to Computers and Control Systems. Other diagnostic methods include:
^ Parameter Identification (PID) Access Mode
^ Freeze Frame Data Access Mode
^ Oxygen Sensor Monitor Mode