Diagnostics

Diagnostics


On-Board Diagnostic (OBD) With Scan Tool

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

These Self Tests should be used to diagnose the PCM and should be carried out in order.

- Self Test - Key ON Engine OFF (KOEO)
- Self Test - Continuous Memory Codes
- Self Test - Key ON Engine Running (KOER)
- Special Test Modes:
- Wiggle Test Mode
- Output Test Mode

- PCM Reset Mode
- Clearing DTCs P1000
- OBD II Drive Cycle
- Other Diagnostic Tool Features

For further information on other diagnostic testing features using the scan tool, refer to Computers and Control Systems Information. Other diagnostic methods include the following.

- PID Access Mode
- Freeze Frame Data Access Mode
- Oxygen sensor Monitor Mode